Thermadyne THERMAL ARC ARC-MASTER 351 User manual

ARC-MASTER 351
For the Following Specs:
•500123A-1
OWNER’S MANUAL Number 430429-290
Revised December 1, 1997
THERMAL ARC INC., TROY, OHIO 45373-1085, U.S.A.
IMPORTANT: Readtheseinstructionsbeforeinstalling, operating, or servicing this system.

INTRODUCTION 1
How To Use This Manual ..................................1-1
Equipment Identification ..................................1-1
Receipt Of Equipment ...................................1-1
ARC WELDING SAFETY INSTRUCTIONS AND WARNINGS 2
DESCRIPTION OF EQUIPMENT 3
General ...........................................3-1
Specifications ........................................3-1
Protection Features .....................................3-3
Description of Controls and Features ............................3-4
INSTALLATION 4
Location ...........................................4-1
Voltage Changeover ....................................4-1
Connecting Welding Machine to Line Voltage .......................4-1
Connection Instructions ...................................4-2
Grounding ..........................................4-3
Welding Leads .......................................4-4
Pulsed-GMAW Schedule Selection .............................4-5
OPERATION 5
General ...........................................5-1
SMAW Operation ......................................5-1
GTAW Operation ......................................5-2
GMAW/FCAW Operation ..................................5-3
Pulsed GMAW .......................................5-3
Operation, Standard Mode (STD) ..............................5-6
Operation, Automatic Voltage Control Mode (AVC) ....................5-7
MAINTENANCE 6
TROUBLESHOOTING 7
PARTS LIST 8
Equipment Identification ..................................8-1
How To Use This Parts List .................................8-1
DIAGRAMS
430429-290
Table of Contents
December 1, 1997 Revised

INTRODUCTION
How To Use This Manual
This Owner’s Manual usually applies to just the
underlined specification or part numbers listed on
the cover. If none are underlined, they are all cov-
ered by this manual.
To ensure safe operation, read the entire manual,
including the chapter on safety instructions and
warnings.
Throughout this manual, the words WARNING,
CAUTION, and NOTE may appear. Pay particular
attention to the information provided under these
headings. These special annotations are easily rec-
ognized as follows:
WARNING gives information re-
garding possible personal in-
jury. Warnings will be enclosed
in a box such as this.
CAUTION refers to possible equipment
damage. Cautions will be shown in bold
type.
NOTE offers helpful information concern-
ingcertainoperatingprocedures. Noteswill
be shown in italics.
Equipment Identification
The unit’s identification number (specification or
part number), model, and serial number usually
appear on a nameplate attached to the control
panel. In some cases, the nameplate may be at-
tached to the rear panel. Equipment which does not
have a control panelsuch as gun and cable assem-
blies are identified only by the specification or part
number printed on the shipping container. Record
these numbers for future reference.
Receipt Of Equipment
When you receive the equipment, check it against
the invoice to make sure it is complete and inspect
theequipmentforpossibledamageduetoshipping.
If there is any damage, notify the carrier immedi-
ately to file a claim. Furnish complete information
concerning damage claims or shipping errors to
Thermal Arc, Order Department, 2200 Corporate
Drive, Troy, Ohio 45373-1085. Include all equip-
ment identification numbers as described above
along with a full description of the parts in error.
Move the equipment to the installation site before
uncrating the unit. A lifting eye extends through the
top of the cabinet on most equipment to facilitate
handling with a hoist or crane. Use care to avoid
damaging the equipment when using bars, ham-
mers, etc., to uncrate the unit.
WARNING: Falling machine due
to lifting eye failure may cause
death or serious injury.
•Lifting device may fail when overloaded.
•This lifting device is designed to lift the
power source ONLY. If the machine is
equipped with a trailer or accessories over
100 pounds, DO NOT LIFT by lifting eye.
•Avoid sudden jerks, drops, or swinging.
•Check lifting device components visually
for looseness and signs of metal fatigue.
•Before changing any hardware, check
grade and size of bolts, and replace with
bolts of equal or higher size and grade.
Additional copies of this manual may be pur-
chased by contacting Thermal Arc at the address
given above. Include the Owner’s Manual number
and equipment identification numbers.
430429-290
INTRODUCTION
December 1, 1997 Revised 1-1

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430429-290
INTRODUCTION
1-2 December 1, 1997 Revised

PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH. KEEP CHILDREN AWAY. PACEMAKER
WEARERS KEEPAWAY UNTIL CONSULTING YOURDOCTOR. DO NOT LOSETHESE INSTRUCTIONS. READ OPERATING/INSTRUC-
TION MANUAL BEFORE INSTALLING, OPERATING OR SERVICING THIS EQUIPMENT.
Welding products and welding processes can cause serious injury or death, or damage to other equipment or property, if the operator does
not strictly observe all safety rules and take precautionary actions.
Safe practices have developed from past experience in the use of welding and cutting. These practices must be learned through study and
training before using this equipment. Anyone not having extensive training in welding and cutting practices should not attempt to weld. Certain
of the practices apply to equipment connected to power lines; other practices apply to engine driven equipment.
Safe practices are outlined in the American National Standard Z49.1 entitled: SAFETY IN WELDING AND CUTTING. This publication and
other guides to what you should learn before operating this equipment are listed at the end of these safety precautions.
HAVE ALL INSTALLATION, OPERATION, MAINTENANCE, AND REPAIR WORK PERFORMED ONLY BY QUALIFIED PEOPLE.
ELECTRIC SHOCK can kill.
Touching live electrical parts can cause fatalshocks
or severe burns. The electrode and work circuit is
electrically live whenever the output is on. The input
power circuit and machine internal circuits are also
livewhenpowerison.Insemiautomaticorautomatic
wire welding, the wire, wire reel, drive roll housing,
and all metal parts touching the welding wire are
electrically live. Incorrectly installed or improperly
grounded equipment is a hazard.
1. Do not touch live electrical parts.
2. Wear dry, hole-free insulating gloves and body protection.
3. Insulate yourself from work and ground using dry insulating mats
or covers.
4. Disconnect input power or stop engine before installing or serv-
icing this equipment. Lock input power disconnect switch open,
or remove line fuses so power cannot be turned on accidentally.
5. Properly install and ground this equipment according to its
Owner’s Manual and national, state, and local codes.
6. Turn off all equipment when not in use. Disconnect power to
equipment if it will be left unattended or out of service.
7. Use fully insulated electrode holders. Never dip holder in water
to cool it or lay it down on the ground or the work surface. Do not
touch holders connected to two welding machines at the same
time or touch other people with the holder or electrode.
8. Do not use worn, damaged,undersized, or poorly spliced cables.
9. Do not wrap cables around your body.
10. Ground the workpiece to a good electrical (earth) ground.
11. Do not touch electrode while in contact with the work (ground)
circuit.
12. Useonly well-maintainedequipment.Repairorreplacedamaged
parts at once.
13. In confined spaces or damp locations, do not use a welder with
AC output unless it is equipped with a voltage reducer. Use
equipment with DC output.
14. Wear a safety harness to prevent falling if working above floor
level.
15. Keep all panels and covers securely in place.
ARC WELDING SAFETY INSTRUCTIONS AND WARNINGS
ARC RAYS can burn eyes and skin;
NOISE can damage hearing.
Arc rays from the welding process produce intense
heat and strong ultraviolet rays that can burn eyes
and skin. Noise from some processes can damage
hearing.
1. Wear a welding helmet fitted with a proper shade of filter (see
ANSI Z49.1 listed in Safety Standards) to protect your face and
eyes when welding or watching.
2. Wear approved safety glasses. Side shields recommended.
3. Use protective screens or barriers to protect others from flash
and glare; warn others not to watch the arc.
4. Wear protective clothing made from durable, flame-resistant
material (wool and leather) and foot protection.
5. Use approved ear plugs or ear muffs if noise level is high.
ARC WELDING can be hazardous.
Eye protection filter shade selector for welding or cutting (goggles or helmet), from AWS A6.2-73.
Welding or Cutting
Operation
Torch soldering
Torch brazing
Oxygen cutting
Light
Medium
Heavy
Gas welding
Light
Medium
Heavy
Shielded metal-arc welding
(stick) electrodes
Welding or Cutting
Operation
Gas metal-arc welding (MIG)
Non-ferrous base metal
Ferrous base metal
Gas tungsten arc welding (TIG)
Atomic hydrogen welding
Carbon arc welding
Plasma arc welding
Carbon arc air gouging
Light
Heavy
Plasma arc cutting
Light
Medium
Heavy
Electrode Size
Metal Thickness
or Welding Current
—
—
Under 1 in., 25 mm
1 to 6 in., 25-150 mm
Over 6 in., 150 mm
Under 1/8 in., 3 mm
1/8 to 1/2 in., 3-12 mm
Over 1/2 in., 12 mm
Under 5/32 in., 4 mm
5/32 to 1/4 in., 4 to 6.4 mm
Over 1/4 in., 6.4 mm
Electrode Size
Metal Thickness
or Welding Current
All
All
All
All
All
All
Under 300 Amp
300 to 400 Amp
Over 400 Amp
Filter
Shade
No.
2
3or4
3or4
4or5
5or6
4or5
5or6
6or8
10
12
14
Filter
Shade
No.
11
12
12
12
12
12
12
14
9
12
14
ARC WELDING SAFETY INSTRUCTIONS AND WARNINGS
Instruction 830001
May 8, 1996 2-1

WELDING can cause fire or explosion.
Sparks and spatter fly off from the welding arc. The
flying sparks and hot metal, weld spatter, hot work-
piece, and hot equipment can cause fires and burns.
Accidental contact of electrode or welding wire to
metal objects can cause sparks, overheating, or fire.
1. Protect yourself and others from flying sparks and hot metal.
2. Do not weld where flying sparks can strike flammable material.
3. Remove all flammables within 35 ft (10.7 m) of the welding arc.
If this is not possible, tightly cover them with approved covers.
4. Be alert that welding sparks and hot materials from welding can
easily go through small cracks and openings to adjacent areas.
5. Watch for fire, and keep a fire extinguisher nearby.
6. Be aware that welding on a ceiling, floor, bulkhead, or partition
can cause fire on the hidden side.
7. Do not weld on closed containers such as tanks or drums.
8. Connect work cable to the work as close to the welding area as
practical to prevent welding current from traveling long, possibly
unknown paths and causing electric shock and fire hazards.
9. Do not use welder to thaw frozen pipes.
10. Remove stick electrode from holder or cut off welding wire at
contact tip when not in use.
11. Wear oil-free protective garments such as leather gloves, heavy
shirt, cuffless trousers, high shoes, and a cap.
FLYING SPARKS AND HOT METAL can
cause injury.
Chipping and grinding cause flying metal. As welds
cool, they can throw off slag.
1. Wear approved face shield or safety goggles. Side shields rec-
ommended.
2. Wear proper body protection to protect skin.
CYLINDERS can explode if damaged.
Shielding gas cylinders contain gas under high pres-
sure. If damaged, a cylinder can explode. Since gas
cylinders are normally part of the welding process,
be sure to treat them carefully.
1. Protectcompressedgascylindersfromexcessiveheat,mechani-
cal shocks, and arcs.
2. Install and secure cylinders in an upright position by chaining
themtoastationarysupportorequipmentcylinderracktoprevent
falling or tipping.
3. Keep cylinders away from any welding or other electrical circuits.
4. Never allow a welding electrode to touch any cylinder.
5. Use only correct shielding gas cylinders, regulators, hoses, and
fittings designed for the specific application; maintain them and
associated parts in good condition.
6. Turn face away from valve outlet when opening cylinder valve.
7. Keep protective cap in place over valve except when cylinder is
in use or connected for use.
8. Read and follow instructions on compressed gas cylinders, asso-
ciated equipment, and CGA publication P-1 listed in Safety
Standards.
ENGINES can be hazardous.
ENGINE EXHAUST GASES can kill.
Engines produce harmful exhaust gases.
1. Use equipment outside in open, well-ventilated areas.
2. If used in a closed area, vent engine exhaust outside and away
from any building air intakes.
FUMES AND GASES can be hazardous
to your health.
Weldingproducesfumesandgases.Breathingthese
fumes and gases can be hazardous to your health.
1. Keep your head out of the fumes. Do not breath the fumes.
2. If inside, ventilate the area and/or use exhaust at the arc to
remove welding fumes and gases.
3. If ventilation is poor, use an approved air-supplied respirator.
4. Read the Material Safety Data Sheets (MSDSs) and the manu-
facturer’s instruction for metals, consumables, coatings, and
cleaners.
5. Work in a confined space only if it is well ventilated, or while
wearing an air-supplied respirator. Shielding gases used for
welding can displace air causing injury or death. Be sure the
breathing air is safe.
6. Do not weld in locations near degreasing, cleaning, or spraying
operations. The heat and rays of the arc can react with vapors to
form highly toxic and irritating gases.
7. Do not weld on coated metals, such as galvanized, lead, or
cadmium plated steel, unless the coating is removed from the
weld area, the area is well ventilated, and if necessary, while
wearing an air-supplied respirator. The coatings and any metals
containing these elements can give off toxic fumes if welded.
ARC WELDING SAFETY INSTRUCTIONS AND WARNINGS
Instruction 830001
2-2 May 8, 1996

STEAM AND PRESSURIZED HOT
COOLANT can burn face, eyes, and
skin.
The coolant in the radiator can be very hot and under
pressure.
1. Do not remove radiator cap when engine is hot. Allow engine to
cool.
2. Wear gloves and put a rag over cap area when removing cap.
3. Allow pressure to escape before completely removing cap.
PRINCIPAL SAFETY STANDARDS
Safety in Welding and Cutting, ANSIStandard Z49.1, from American
Welding Society, 550 N.W. LeJeune Rd., Miami, FL 33126.
Safety and Health Standards, OSHA 29 CFR 1910, from Superinten-
dent of Documents, U.S. Government Printing Office, Washington,
D.C. 20402.
Recommended Safe Practices for the Preparation for Welding and
CuttingofContainersThatHaveHeldHazardousSubstances,Ameri-
can Welding Society Standard AWS F4.1, from American Welding
Society, 550 N.W. LeJeune Rd., Miami, FL 33126.
National Electrical Code, NFPA Standard 70, from National Fire
Protection Association, Batterymarch Park, Quincy, MA 02269.
Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet
P-1, from Compressed Gas Association, 1235 Jefferson Davis High-
way, Suite 501, Arlington, VA 22202.
Code for Safety in Welding and Cutting, CSA Standard W117.2, from
Canadian Standards Association, Standards Sales, 178 Rexdale
Boulevard, Rexdale, Ontario, Canada M9W 1R3.
Safe Practices for Occupation and Educational Eye and Face Pro-
tection, ANSI Standard Z87.1, from American National Standards
Institute, 1430 Broadway, New York, NY 10018.
Cutting and Welding Processes, NFPA Standard 51B, from National
Fire Protection Association, Batterymarch Park, Quincy, MA 02269.
SPARKS can cause BATTERY GASES
TO EXPLODE; BATTERY ACID can
burn eyes and skin.
Batteriescontainacidandgenerateexplosivegases.
1. Always wear a face shield when working on a battery.
2. Stop engine before disconnecting or connecting battery cables.
3. Do not allow tools to cause sparks when working on a battery.
4. Do not use welder to charge batteries or jump start vehicles.
5. Observe correct polarity (+ and –) on batteries.
MOVING PARTS can cause injury.
Moving parts, such as fans, rotors, and belts cancut
fingers and hands and catch loose clothing.
1. Keep all doors, panels, covers, and guards closed and securely
in place.
2. Stop engine before installing or connecting unit.
3. Have only qualified people remove guards or covers for mainte-
nance and troubleshooting as necessary.
4. To prevent accidental starting during servicing, disconnectnega-
tive (-) battery cable from battery.
5. Keep hands, hair, loose clothing, and tools away from moving
parts.
6. Reinstall panels or guards and close doors when servicing is
finished and before starting engine.
ENGINE FUEL can cause fire or
explosion.
Engine fuel is highly flammable.
1. Stop engine before checking or adding fuel.
2. Donotadd fuelwhilesmokingorif unitisnear anysparksoropen
flames.
3. Allow engine to cool before fueling. If possible, check and add
fuel to cold engine before beginning job.
4. Do not overfill tank —allow room for fuel to expand.
5. Do not spill fuel. If fuel is spilled, clean up before starting engine.
NOTE: Considerations About Welding And The Effects Of Low Frequency Electric And Magnetic Fields
The following is a quotation from the General Conclusions Section of the U.S. Congress, Office of Technology Assessment, Biological Effects
of Power Frequency Electric & Magnetic Fields —Background Paper, OTA-BP-E-63 (Washington, DC: U.S. Government Printing Office, May
1989): “... there is now a very large volume of scientific findings based on experiments at the cellular level and from studies with animals and
people which clearly establish that low frequency magnetic fields can interact with, and produce changes in, biological systems. While most of
this work is of very high quality, the results are complex. Current scientific understanding does not yet allow us to interpret the evidence in a
single coherent framework. Even more frustrating, it does not yet allow us to draw definite conclusions about questions of possible risk or to
offer clear science-based advice on strategies to minimize or avoid potential risks.”
To reduce magnetic fields in the workplace, use the following procedures:
About Pacemakers:
The above procedures are among those also normally recommended for pacemaker wearers. Consult your doctor for complete information.
1. Keep cables close together by twisting or taping them.
2. Arrange cables to one side and away from the operator.
3. Do not coil or drape cables around the body.
4. Keep welding power source and cables as far away from body as
practical.
WARNING: This product, when used for welding or cutting, produces fumes or gases which contain chemicals known to the State
of California to cause birth defects and, in some cases, cancer. (California Health & Safety Code Sec. 25249.5 et seq.)
ARC WELDING SAFETY INSTRUCTIONS AND WARNINGS
Instruction 830001
May 8, 1996 2-3

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ARC WELDING SAFETY INSTRUCTIONS AND WARNINGS
Instruction 830001
2-4 May 8, 1996

PROTEGEZ-VOUS, AINSI QUE LES AUTRES, CONTRE LES BLESSURES GRAVES POSSIBLES OU LA MORT. NE LAISSEZ PAS LES
ENFANTSS’APPROCHER,NI LESPORTEURSDESTIMULATEURCARDIAQUE(AMOINSQU’ILSN’AIENT CONSULTEUNMEDECIN).
CONSERVEZ CES INSTRUCTIONS. LISEZ LE MANUEL D’OPERATION OU LES INSTRUCTIONS AVANT D’INSTALLER, UTILISER OU
ENTRETENIR CET EQUIPEMENT.
Les produits et procédés de soudage peuvent sauser des blessures graves ou la mort, de même que des dommages au reste du matériel
et àla propriété,sil’utilisateur n’adhère pas strictement àtoutes les règles de sécuritéet ne prend pas les précautions nécessaires.
En soudage et coupage, des pratiques sécuritaires se sont développées suite àl’expérience passée. Ces pratiques doivent être apprises
par étude ou entraînement avant d’utiliserl’equipement. Toute personne n’ayant pas suivi un entraînement intensif en soudage et coupage
ne devrait pas tenter de souder. Certaines pratiques concernent les équipements raccordés aux lignes d’alimentation alors que d’autres
s’adressent aux groupes électrogènes.
La norme Z49.1 de l’American National Standard, intitulée“SAFETY IN WELDING AND CUTTING”présente les pratiques sécuritaires à
suivre. Ce document ainsi que d’autres guides que vous devriez connaître avant d’utiliser cet équipement sont présentésàla fin de ces
instructions de sécurité.
SEULES DES PERSONNES QUALIFIEES DOIVENT FAIRE DES TRAVAUX D’INSTALLATION, DE REPARATION, D’ENTRETIEN ET
D’ESSAI.
L’ELECTROCUTION PEUT ETRE
MORTELLE.
Une décharge électrique peut tuer ou brûler grave-
ment. L’électrode et le circuit de soudage sont sous
tension dès la mise en circuit. Le circuit d’alimenta-
tion et les circuits internes de l’équipement sont
aussi sous tension dès la mise en marche. En
soudage automatique ou semi-automatique avec
fil, ce dernier, le rouleau ou la bobine de fil, le
logement des galets d’entrainement et toutes les
pièces métalliques en contact avec le fil de soudage
sont sous tension. Un équipement inadéquatement
installéou inadéquatement mis àla terre est dangereux.
1. Ne touchez pas àdes pièces sous tension.
2. Portez des gants et des vêtements isolants, secs et non troués.
3. Isolez-vousde lapièceàsouderet delamise àlaterreaumoyen
de tapis isolants ou autres.
4. Déconnectez la prise d’alimentation de l’équipement ou arrêtez
le moteur avant de l’installer ou d’en faire l’entretien. Bloquez le
commutateuren circuitouvertouenlevezlesfusiblesdel’alimen-
tation afin d’éviter une mise en marche accidentelle.
5. Veuillez àinstaller cet équipement et àle mettre àla terre selon
le manuel d’utilisation et les codes nationaux, provinciaux et
locaux applicables.
6. Arrêtez tout équipement après usage. Coupez l’alimentation de
l’équipement s’il est hors d’usage ou inutilisé.
7. N’utilisezquedesporte-électrodesbienisolés.Nejamaisplonger
les porte-électrodes dans l’eau pour les refroidir. Ne jamais les
laisser traîner par terre ou sur les pièces àsouder. Ne touchez
pas aux porte-électrodes raccordésàdeux sources de courant
en même temps. Ne jamais toucher quelqu’un d’autre avec
l’électrode ou le porte-électrode.
8. N’utilisez pas de câbles électriques usés, endommagés, mal
épissés ou de section trop petite.
9. N’enroulez pas de câbles électriques autour de votre corps.
10. N’utilisez qu’une bonne prise de masse pour la mise àla terre
de la pièce àsouder.
11. Ne touchez pas àl’électrode lorsqu’en contact avec le circuit de
soudage (terre).
12. N’utilisez que des équipements en bon état. Réparez ou rem-
placez aussitôt les pièces endommagées.
13. Dans des espaces confinés ou mouillés, n’utilisez pas de source
de courant alternatif, àmoins qu’il soit muni d’un réducteur de
tension. Utilisez plutôt une source de courant continu.
14. Portez un harnais de sécuritési vous travaillez en hauteur.
15. Fermez solidement tous les panneaux et les capots.
PRECAUTIONS DE SECURITE EN SOUDAGE A L′ARC
LE SOUDAGE A L′ARC EST DANGEREUX
LE RAYONNEMENT DE L′ARC PEUT
BRÛLER LES YEUX ET LA PEAU; LE
BRUIT PEUT ENDOMMAGER L′OUIE.
L’arc de soudage produit une chaleur et des
rayons ultraviolets intenses, susceptibles de
brûler les yeux et la peau. Le bruit causépar
certains procédés peut endommager l’ouïe.
1. Portez une casque de soudeur avec filtre oculaire de nuance
appropriée (consultez la norme ANSI Z49 indiquéeci-après)
pourvous protéger le visage et les yeux lorsque vous soudez ou
que vous observez l’exécution d’une soudure.
2. Portezdes lunettesdesécuritéapprouvées.Desécranslatéraux
sont recommandés.
3. Entourez l’aire de soudage de rideaux ou de cloisons pour
protéger les autres des coups d’arcoudel’éblouissement;
avertissez les observateurs de ne pas regarder l’arc.
4. Portez des vêtements en matériaux ignifuges et durables (laine
et cuir) et des chaussures de sécurité.
5. Portez un casque antibruit ou des bouchons d’oreille approuvés
lorsque le niveau de bruit est élevé.
PRECAUTIONS DE SECURITE EN SOUDAGE A L'ARC
Instruction 830002
8-V-96 2-1

SELECTION DES NUANCES DE FILTRES OCULAIRES POUR LA PROTECTION DES YEUX EN COUPAGE ET SOUDAGE
( selon AWS A 8.2-73 )
Opération
de
Coupage ou soudage
Brasage tendre au chalumeau
Brasage fort au chalumeau
Oxycoupage
mince
moyen
épais
Soudage aux gaz
mince
moyen
épais
Soudage àl’arc avec
electrode enrobées (SMAW)
Soudage àl’arc sous gaz
avec fil plein (GMAW)
métaux non-ferreux
métaux ferreux
Soudage àl’arc sous gaz
avec électrode de tungstène (GTAW)
Soudage àl’hydrogène
atomique (AHW)
Soudage àl’arc avec
électrode de carbone (CAW)
Soudage àl’arc Plasma (PAW)
Gougeage Air-Arc avec
électrode de carbone
mince
épais
Coupage àl’arc Plasma (PAC)
mince
moyen
épais
Dimension d’électrode ou
Epaisseur de métal ou
Intensitéde courant
toutes conditions
toutes conditions
moins de 1 po. (25 mm)
de 1 à6 po. (25 à150 mm)
plus de 6 po. (150 mm)
moins de 1/8 po. (3 mm)
de 1/8 à1/2 po. (3 à12 mm)
plus de 1/2 po. (12 mm)
moins de 5/32 po. (4 mm)
de 5/32 à1/4 po. (4 à6.4 mm)
plus de 1/4 po. (6.4 mm)
toutes conditions
toutes conditions
toutes conditions
toutes conditions
toutes conditions
toutes dimensions
moins de 300 ampères
de 300 à400 ampères
plus de 400 ampères
Nuance de
de filtre
oculaire
2
3 ou 4
2 ou 3
4 ou 5
5 ou 6
4 ou 5
5 ou 6
6 ou 8
10
12
14
11
12
12
12
12
12
12
14
9
12
14
LES VAPEURS ET LES FUMEES SONT
DANGEREUSES POUR LA SANTE.
Le soudage dégage des vapeurs et des fumées
dangereuses àrespirer.
1. Eloignez la tête des fumées pour éviter de les respirer.
2. A l’intérieur, assurez-vous que l’aire de soudage est bien ven-
tilée ou que les fumées et les vapeurs sont aspirées àl’arc.
3. Si la ventilation est inadequate, portez un respirateur àadduc-
tion d’air approuvé.
4. Lisez les fiches signalétiques et les consignes du fabricant
relatives aux métaux, aux produits consummables, aux revête-
ments et aux produits nettoyants.
5. Ne travaillez dans un espace confinéque s’il est bien ventilé;
sinon, portez un respirateur àadduction d’air. Les gaz protec-
teurs de soudage peuvent déplacer l’oxygène de l’air et ainsi
causer des malaises ou la mort. Assurez-vous que l’air est
propre àla respiration.
6. Ne soudez pas àproximitéd’opérations de dégraissage, de
nettoyage ou de pulvérisation. La chaleur et les rayons de l’arc
peuvent réagir avec des vapeurs et former des gaz hautement
toxiques et irritants.
7. Ne soudez des tôles galvanisées ou plaquées au plomb ou au
cadmium que si les zones àsouder ont étégrattées àfond, que
si l’espace est bien ventilé;sinécessaire portez un respirateur
àadduction d’air. Car cesrevêtements et tout métalqui contient
cesélémentspeuventdégagerdesfuméestoxiquesaumoment
du soudage.
PRECAUTIONS DE SECURITE EN SOUDAGE A L'ARC
Instruction 830002
2-2 8-V-96

LE SOUDAGE PEUT CAUSER UN IN-
CENDIE OU UNE EXPLOSION
L’arc produit des étincellies et des projections. Les
particules volantes, le métal chaud, les projections
de soudure et l’équipement surchauffépeuvent
causer un incendie et des brûlures. Le contact
accidentel de l’électrode ou du fil-électrode avec un
objet métallique peut provoquer des étincelles, un échauffement
ou un incendie.
1. Protégez-vous, ainsi que les autres, contre les étincelles et du
métal chaud.
2. Ne soudez pas dans un endroit oùdes particules volantes ou
des projections peuvent atteindre des matériaux inflammables.
3. Enlevez toutes matières inflammables dans un rayon de 10, 7
mètres autour de l’arc, ou couvrez-les soigneusement avec des
bâches approuvées.
4. Méfiez-vous des projections brulantes de soudage susceptibles
de pénétrer dans des aires adjacentes par de petites ouvertures
ou fissures.
5. Méfiez-vous des incendies et gardez un extincteur àportéede
la main.
6. N’oubliez pas qu’une soudure réalisée sur un plafond, un
plancher, une cloison ou une paroi peut enflammer l’autre côté.
7. Ne soudez pas un récipient fermé, tel un réservoir ou un baril.
8. Connectez le câble de soudage le plus près possible de la zone
de soudage pour empêcher le courant de suivre un long par-
cours inconnu, et prévenir ainsi les risques d’électrocution et
d’incendie.
9. Ne dégelez pas les tuyaux avec un source de courant.
10. Otez l’électrode du porte-électrode ou coupez le fil au tube-con-
tact lorsqu’inutiliséaprès le soudage.
11. Portez des vêtements protecteurs non huileux, tels des gants
en cuir, une chemise épaisse, un pantalon revers, des bottines
de sécuritéet un casque.
LES ETINCELLES ET LES PROJEC-
TIONS BRULANTES PEUVENT
CAUSER DES BLESSURES.
Le piquage et le meulage produisent des particules métalliques
volantes. En refroidissant, la soudure peut projeter du éclats de
laitier.
1. Portez un écran facial ou des lunettes protectrices approuvées.
Des écrans latéraux sont recommandés.
2. Portez des vêtements appropriés pour protéger la peau.
LES BOUTEILLES ENDOMMAGEES
PEUVENT EXPLOSER
Les bouteilles contiennent des gaz protecteurs
sous haute pression. Des bouteilles endommagées
peuvent exploser. Comme les bouteilles font nor-
malement partie du procédéde soudage, traitez-
les avec soin.
1. Protégez les bouteilles de gaz comprimécontre les sources de
chaleur intense, les chocs et les arcs de soudage.
2. Enchainez verticalement les bouteilles àun support ou àun
cadre fixe pour les empêcher de tomber ou d’être renversées.
3. Eloignez les bouteilles de tout circuit électrique ou de tout
soudage.
4. Empêchez tout contact entre une bouteille et une électrode de
soudage.
5. N’utilisez que des bouteilles de gazprotecteur, des détendeurs,
des boyauxs et des raccords conçus pour chaque application
spécifique; ces équipements et les pièces connexes doivent
être maintenus en bon état.
6. Ne placez pas le visage face àl’ouverture du robinet de la
bouteille lors de son ouverture.
7. Laissez en place le chapeau de bouteille sauf si en utilisation
ou lorsque raccordépour utilisation.
8. Lisez et respectez les consignes relatives aux bouteilles de gaz
compriméet aux équipements connexes, ainsi que la publica-
tion P-1 de la CGA, identifiée dans la liste de documents
ci-dessous.
LES GAZ D’ECHAPPEMENT DES
MOTEURS PEUVENT ETRE MORTELS.
Les moteurs produisent des gaz d’échappement
nocifs.
1. Utilisez l’équipement àl’extérieur dans des aires ouvertes et
bien ventilées.
2. Si vous utilisez ces équipements dans un endroit confiné, les
fumées d’échappement doivent être envoyées àl’extérieur, loin
des prises d’air du bâtiment.
LES MOTEURS PEUVENT ETRE DANGEREUX
LE CARBURANT PEUR CAUSER UN IN-
CENDIE OU UNE EXPLOSION.
Le carburant est hautement inflammable.
1. Arrêtez le moteur avant de vérifier le niveau de
carburant ou de faire le plein.
2. Ne faites pas le plein en fumant ou proche d’une source
d’étincelles ou d’une flamme nue.
3. Si c’est possible, laissez le moteur refroidir avant de faire le
plein de carburant ou d’en vérifier le niveau au début du
soudage.
4. Ne faites pas le plein de carburant àras bord: prévoyez de
l’espace pour son expansion.
5. Faites attention de ne pas renverser de carburant. Nettoyeztout
carburant renverséavant de faire démarrer le moteur.
PRECAUTIONS DE SECURITE EN SOUDAGE A L'ARC
Instruction 830002
8-V-96 2-3

DES PIECES EN MOUVEMENT PEU-
VENT CAUSER DES BLESSURES.
Despièces en mouvement,telsdesventilateurs,des
rotors et des courroies peuvent couper doigts et
mains, ou accrocher des vêtements amples.
1. Assurez-vous que les portes, les panneaux, les capots et les
protecteurs soient bien fermés.
2. Avant d’installer ou de connecter un système, arrêtez le moteur.
3. Seules des personnes qualifiées doivent démonter des protec-
teurs ou des capots pour faire l’entretien ou le dépannage
nécessaire.
4. Pour empêcher un démarrage accidentel pendant l’entretien,
débranchez le câble d’accumulateur àla borne négative.
5. N’approchez pas les mains ou les cheveux de pièces en mou-
vement; elles peuvent aussi accrocher des vêtements amples
et des outils.
6. Réinstallez les capots ou les protecteurs et fermez les portes
après des travaux d’entretien et avant de faire démarrer le
moteur.
DESETINCELLESPEUVENT FAIREEX-
PLOSER UN ACCUMULATEUR;
L’ELECTROLYTE D’UN ACCUMU-
LATEUR PEUT BRULER LA PEAU ET
LES YEUX.
Les accumulateurs contiennent de l’électrolyte
acide et dégagent des vapeurs explosives.
1. Portez toujours un écran facial en travaillant sur un accumu-
lateur.
2. Arrêtez le moteur avant de connecter ou de déconnecter des
câbles d’accumulateur.
3. N’utilisez que des outils anti-étincelles pour travailler sur un
accumulateur.
4. N’utilisez pas une source de courant de soudage pour charger
un accumulateur ou survolter momentanément un véhicule.
5. Utilisez la polaritécorrecte (+ et –) de l’accumulateur.
LA VAPEUR ET LE LIQUIDE DE RE-
FROIDISSEMENT BRULANT SOUS
PRESSION PEUVENT BRULER LA
PEAU ET LES YEUX.
Le liquide de refroidissement d’un radiateur peut
être brûlant et sous pression.
1. N’ôtez pas le bouchon de radiateur tant que le moteur n’est pas
refroidi.
2. Mettez des gants et posez un torchon sur le bouchon pour l’ôter.
3. Laissez la pression s’échapper avant d’ôter complètement le
bouchon.
PRINCIPALES NORMES DE SECURITE
SafetyinWeldingandCutting,normeANSIZ49.1,AmericanWelding
Society, 550 N.W. LeJeune Rd., Miami, FL 33128.
Safety and Health Standards, OSHA 29 CFR 1910, Superintendent
of Documents, U.S. Government Printing Office, Washington, D.C.
20402.
Recommended Safe Practices for the Preparation for Welding and
CuttingofContainersThatHaveHeldHazardousSubstances,norme
AWS F4.1, American Welding Society, 550 N.W. LeJeune Rd.,
Miami, FL 33128.
National Electrical Code, norme 70 NFPA, National Fire Protection
Association, Batterymarch Park, Quincy, MA 02269.
Safe Handling of Compressed Gases in Cylinders, document P-1,
Compressed Gas Association, 1235 Jefferson DavisHighway, Suite
501, Arlington, VA 22202.
Code for Safety in Welding and Cutting, norme CSA W117.2 Asso-
ciation canadienne de normalisation, Standards Sales, 276 Rexdale
Boulevard, Rexdale, Ontario, Canada M9W 1R3.
Safe Practices for Occupation and Educational Eye and Face Pro-
tection, norme ANSI Z87.1, American National Standards Institute,
1430 Broadway, New York, NY 10018.
Cutting and Welding Processes, norme 51B NFPA, National Fire
Protection Association, Batterymarch Park, Quincy, MA 02269.
PRECAUTIONS DE SECURITE EN SOUDAGE A L'ARC
Instruction 830002
2-4 8-V-96

DESCRIPTION OF EQUIPMENT
General
The ARC-MASTER 351 is a primary inverter DC
power source that can be used forconstant voltage,
constantcurrent, and pulsewelding processes. The
DC output is produced by a transistorized primary
inverter operating at a frequency of 20 kHz, which
allows for quiet, efficient operation. The output is
rated at 350 amperes/34 volts at 100% duty cycle,
for all modes of operation. An auxiliary 120 volt/10
ampere AC output is also provided, with circuit
breaker protection.
Controls for the following welding processes are
built into the ARC-MASTER 351: Shielded Metal
Arc Welding (Stick), Gas Tungsten Arc Welding
(TIG), Gas Metal Arc Welding (MIG), and Pulsed
GasMetalArcWelding(Pulsed MIG).As anintegral
part of the Pulsed Mig control, the power source
contains pre-programmed weld schedules for 24
wire/gas combinations. All 24 schedules may also
be programmed by the operator. An optional Pro-
gramming Pendant (204180-1) is required to do
this.The followingcontrolsareincorporated into the
front panel of the power source: Process select
switch, Amperage/Voltage/Pulse Frequency con-
trol, Inductance/Arc-Force control, Remote/Local
control switch, Digital amps/volts meter and switch,
Pulse Mig schedule select switch, and indicator
lights.
The ARC-MASTER 351 also contains the follow-
ing protection features to assure continued, reliable
operation: Input over and undervoltage shutdown,
overcurrent shutdown, short circuit protection,
overtemperatureshutdown,outputopencircuitvolt-
age limitation, and fan thermostat.
Input Data
Line Voltage Line Current kVA Eff.PF Output
200 VAC/60 Hz 53 Amps 18.4 84% .84 100% @ 350A/34V
230 VAC/60 Hz 47 Amps 18.7 85% .82 100% @ 350A/34V
400 VAC/60 Hz 25 Amps 17.3 84% .89 100% @ 350A/34V
460 VAC/60 Hz 22 Amps 17.5 85% .87 100% @ 350A/34V
400 VAC/50 Hz 25 Amps 17.3 84% .89 100% @ 350A/34V
Maximum Average Output Current: 350 Amps (100% duty cycle)
Minimum Average Output Current: 10 Amps
Maximum Pulse Current: 450 Amps
Short-Circuit Limit: 600 Amps
Overcurrent Shutdown: 370 Amps
Maximum Open Circuit Voltage: 50 Volts
Voltage Adjust Range for CV: 10 –34 Volts
Current Adjust Range for CC: 0 –350 Amps
Operating Temperature Range 0 –40°C
Input Line Variations ±10% (for all line voltages)
Line Regulation ±1%
Load Regulation ±1%
Specifications
430429-290
DESCRIPTION OF EQUIPMENT
June 13, 1996 Revised 3-1

Figure 3-1
430429-290
DESCRIPTION OF EQUIPMENT
3-2 June 13, 1996 Revised

Protection Features
The machine has several built-in protection fea-
tures designed to assure reliability.
a. Short-Circuit Current Limit —The output
current is limited to a safe absolute maximum value
as listed in the specifications. This current limit
circuit is active for all modes of welding, and will
instantly limit the current during short-circuit condi-
tions. The circuit will not shut the power source off.
b.Overcurrent Shutdown —If the average weld-
ing current exceeds the shutdown limit listed above
(fora couple ofseconds), thepower sourcewillshut
itselfoffandturnontheREDoverloadindicatorlight.
ThegreenReady-to-Weldlightwillalsoshutoff.The
power source will remain off with the RED light on
until it is reset by momentarily turning the AC power
ON/OFF switch to the OFF position.
c. Overtemperature Shutdown —A fan thermo-
stat will turn the fan on as the machine heats up.
The fan will remain on until the machine cools back
down; on hot days the fan may run continuously. In
the event that the fan is unable to cool the machine
because of blocked air flow, excessive ambient
temperature, overload, etc., one of two protection
thermostatswillshut themachineoff. Ifthemachine
is shut off because of overtemperature, the RED
overload indicator light will turn on, and the green
Ready-to-Weld light will shut off. The fan will con-
tinue to operate to cool the machine. The power
source will remain off with the RED light on until it
is reset by momentarily turning the AC power
ON/OFF switch to the OFF position.
d. Input Voltage Detection —If the input voltage
is too high or too low, the machine will not operate.
If this condition is detected, the GREEN Ready-to-
Weld light will shut off (or not come on initially). The
red overload indicator light will be off. On initial
power up, the GREEN Ready-to-Weld light will not
turn on until the internal voltages have stabilized (a
couple of seconds). The power source will remain
off until it is reset by momentarily turning the AC
power ON/OFF switch to the OFF position.
CAUTION: Application of the incorrect
voltage or incorrect voltage changeover
link arrangements could result in dam-
age to the power source. See Installa-
tion chapter of manual and verify input
connections and voltage.
e. Open Circuit Voltage Limitation —Under
most conditions when an arc is not present, the
output voltage of the power source will be limited to
approximately 50 volts.
Figure 3-2 Dimensions
430429-290
DESCRIPTION OF EQUIPMENT
June 13, 1996 Revised 3-3

Description of Controls and
Features
(See Figure 3-3)
1—Process Select Switch: This four-position
switch is used to set the power source according to
the welding process used. Position 1 (SMAW) is
used for shielded metal arc welding (stick) and
carbon arc gouging. In position 1, the power source
operates in the constant current mode, with arc
force. Position 2 (GTAW) is used for gas tungsten
arc welding (TIG). In position 2, the power source
operates in constant current mode with a lift arc
starting circuit activated and arc force disabled.
Position3(GMAW/FCAW)isusedforgasmetaland
flux cored arc welding (MIG). In position 3, the
power source operates in the constant voltage
mode, with variable electronic inductance control.
Position 4 (Pulsed GMAW) is used for pulsed gas
metal arc welding (pulsed MIG). In position 4, the
schedule select switch is activated allowing prepro-
grammed pulse parameters to control the welding
process.
2—Remote/Local Control Switch: This switch
determines if the output of the power source is
controlled by the front panel control dial or remotely
through the 19-pin amphenol on the rear of the
power source.
3—Overload Indicator (RED): This red light will
turn on for either an overcurrent or overtemperature
condition.
4—Ready Indicator (GREEN): This green light
will be on whenever the power source is Ready-to-
Weld. If the green light is not on, the power source
will not produce any output power.
5—DigitalMeterDisplay:Thedigitalmeterisused
to preset the output voltage, current, pulse fre-
quency, or arc length whenever the power source
is not welding. When the power source detects that
an arc has been established, the digital display
automatically switches to displaying either actual
welding volts or amps, depending on the position of
the meter amps/volts switch.
Inthepresetmode(noarc),thedisplaywillchange
based on the welding process selected by the proc-
ess select switch. For positions 1 and 2, the meter
will display preset welding amps.For position 3, the
meter will display preset welding volts. For position
4, the meter will display preset pulse frequency
(when the STD/AVC switch is in the STD position)
or arc length (when the STD/AVC switch is in the
AVC position). The meter does not display exact
frequency (Hertz) or arc length (Volts), but a refer-
ence number from 0 to 440. When the STD/AVC
switch is in the STD position, 0 represents the
lowest pulse rate (approximately 30 pulses per sec-
ond)and440thehighest(approximately300pulses
per second). For the STD/AVC switch in the AVC
position, 0 is the shortest arc length possible, and
440 the longest.
Figure 3-3 Control and Rear Panel
430429-290
DESCRIPTION OF EQUIPMENT
3-4 June 13, 1996 Revised

6—AC Power ON/OFF Switch: This switch is
used to control the three-phase input power applied
to the power source. When this switch is in the ON
position, the digital meter display should light up,
and the green Ready-to-Weld light should be on.
7—MeterAmps/VoltsSwitch:Thisswitchcontrols
whether the digital meter displays welding amps or
weldingvoltsafteranarchasbeenestablished.This
switch has no effect prior to striking an arc.
8—OutputLocalAmps/VoltsControl: This control
dial sets the output welding amps, volts, or pulse
rate, depending on the position of the welding proc-
ess select switch. For all processes except GTAW
(TIG), this control is only active when the remote/lo-
calswitchisinthe local position.For TIG this control
sets the maximum welding amps available, and the
remote control allows control from 0 to this maxi-
mum. Clockwise is increasing output.
9—Arc Force/Inductance Control: This control
pot. is active for SMAW (stick) and GMAW (MIG).
In SMAW mode, this pot. controls the amount of arc
force, with maximum arc force being full clockwise.
The higher the arc force setting, the more drive the
arc will have. In GMAW mode, this pot. controls the
electronic inductance feature, with maximum induc-
tance being full counterclockwise. More inductance
makes the arc softer and less spattery. Less induc-
tance makes the arc harsher with more drive. The
inductance should be set according to the wire and
gas used, and the type of weld characteristic de-
sired.
10 —Schedule Select Switch: This 12-position
switchis usedtoselect thewire/gascombinationfor
Pulsed GMAW welding. This switch is only active
whentheweldingprocessselectswitchisinposition
4 (Pulsed GMAW). Set this switch according to the
chart on the front panel of the power source to the
wire/gas combination being used. Other gas/wire
combinations can be used but may require some
trial and error to determine the correct schedule to
run these on. See Operation chapter of this manual
for more details on the Pulsed GMAW operation.
11 —Output Negative Terminal: Connection point
for negative welding lead.
12 —Output Positive Terminal: Connection point
for positive welding lead.
13 —STD/AVC Select Switch: This switch is used
to select Standard (STD) Pulsed GMAW schedules
(schedules 1–12) or Automatic Voltage Control
(AVC) Pulsed GMAW schedules (schedules
13–24). See the Operation’s chapter of this manual
for more details on Pulsed GMAW.
14 —Programming Pendant plug: Optional Pro-
gramming Pendant (204180-1) plugs in here. This
option allows the user to customize any or all of the
24pulsed-MIGschedules to theirparticularapplica-
tion. Once a schedule is changed, the pendant can
beremovedandtheARC-MASTERwillusethenew
settings.
15 —Circuit Breaker: This 10-amp pushbutton
breaker provides protection for the 120-V AC cir-
cuit. This circuit breaker protects the duplex recep-
tacle as well as the 120-V AC power provided
through the 19-pin amphenol.
16 —5-Pin Amphenol Plug: This amphenol plug
allows interface to a number of simple Thermal Arc
wire feeders. It provides a solid-state contactor
On/Off control. The pinout is as follows:
A) Contactor circuit
B) Contactor circuit (A-B closure turns
power source on)
C) 24 VAC L1
D) 24 VAC L1
E) 24 VAC L2
17 —19-Pin Amphenol Plug: This amphenol plug
allows interface to more complex Thermal Arc wire
feeders and other controls where remote output
control as well as contactor control is required. The
pinout is as follows:
A) Contactor circuit
B) Contactor circuit (A-B closure turns
the power source on)
C) Positive Output Volts
D) 24 VAC L2
E) 120 VAC
F) 120 VAC Neutral
G) Chassis ground
H) Remote Control Maximum
(top side of pot.)
J) Remote Control Input (wiper of pot.)
K) Remote Control Minimum (bottom
side of pot.)
L) Control circuit common
M) Arc established = + 15 volts
N) Open
P) 24 VAC L2
R) 115 VAC Neutral
S) Open
T) Open
U) Scaled Output Current Signal
(100 Amps/Volt)
V) Negative Output Volts (same as pin L)
18 —Opening for Input Power: This is the access
opening for the three-phase input power connec-
tions.
430429-290
DESCRIPTION OF EQUIPMENT
June 13, 1996 Revised 3-5

19 —Duplex Receptacle: This receptacle can
provide up to 10 amps of 120-V AC auxiliary power
for powering wire feeders, water circulators, etc.
20 —Circuit Breaker: This 10-amp pushbutton
breaker provides protection for the 24 V AC circuit.
430429-290
DESCRIPTION OF EQUIPMENT
3-6 June 13, 1996 Revised

INSTALLATION
Location
For best operating characteristics and longest unit
life, take care in selecting an installation site. Avoid
locations exposed to high humidity, dust, high am-
bienttemperature,orcorrosivefumes.Moisturecan
condense on electrical components, causing corro-
sionorshortingofcircuits.Dirtoncomponentshelps
retain this moisture.
Adequate air circulation is needed at all times in
order to assure proper operation. Provide a mini-
mum of 12 inches (305 mm) of free air space on all
sides of the unit. Make sure that the ventilator
openings are not obstructed. Ventilation air flow is
from rear to front.
Voltage Changeover
Remove cabinet right side panel for access to
LINE VOLTAGE CHANGEOVER circuitry. Check
line voltage connections against instructions on
VOLTAGE CHANGEOVER FIGURES (Figures 4-2
through 4-5). If necessary, rearrange link connec-
tions.
Connecting Welding Machine to
Line Voltage
The input power should be connected to the unit
through a fused disconnect switch, or other suitable
disconnecting means furnished by the user. Access
is provided in the rear panel of the machine for the
entry of the input conductors.
DANGER: ELECTRIC SHOCK
CAN KILL. Open the discon-
nect switch, or breaker, and
determine that no voltage is
present, before connecting
wires between welding ma-
chine and power supply.
CAUTION: The method of installation,
conductor size, and overcurrent protec-
tion shall conform to the requirements
of the local electrical code, the National
Electrical Code, or other national codes,
as applicable. All installation wiring and
machine reconnection shall be done by
qualified persons.
Table 4-1 provides minimal information for selec-
tion of line conductors, fuses, and the equipment
grounding conductor. This information is from the
National Electrical Code NFPA 70-1981 Edition.
Install this equipment per the latest edition, avail-
able from the National Fire Protection Association,
470 Atlantic Avenue, Boston, MA 02210.
Line
Volts Rated Line Amps
Approx.
Line
Fuse Size Copper Line Wire Size*
Copper
Grounding
Conductor
Min. Size
200
230
400
460
53
47
25
22
60
60
40
30
No. 6
No. 8
No. 10
No. 10
No. 8
No. 8
No. 10
No. 10
Table 4-1 Recommended Wire and Fuse Size Table
* Conductor size shall be modified as required for line voltage drop and ambient temperature. Sizes listed
are based on 90°C conductor insulation, designated as FEP, FEPB, RHH, and THHN.
430429-290
INSTALLATION
June 13, 1996 Revised 4-1