Eaton EPC Series Setup guide

SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE
IF 267
EPC series circuit breaker enclosure with
interlocked Arktite®receptacle
Installation & maintenance information
APPLICATION
EPC Series circuit breakers with interlocked Arktite receptacle are designed
for use as a service outlet to portable electric equipment with the circuit
breaker providing overcurrent and short circuit protection.
EPC Series circuit breakers are rated at 20, 30, 40, 50, 70, 90 and 100
amperes. The Arktite receptacles are rated at 30, 60 and 100 amperes,
and provided in 2-wire, 3-pole and 3-wire, 4-pole designs. The receptacles
provide attachment of the grounding wire to an extra grounding pole and
direct connection between plug and receptacle housings and grounding
pole. The polarized receptacle is compatible with APJ, NPJ and CPH Series
Style 2 plugs with the same style, current rating and number of poles. EPC
Series circuit breakers with interlocked Arktite receptacle are designed for
use in Class I, Groups C, D; Class II, Groups F, G; and Class Ill hazardous
(classified) areas as defined by the National Electrical Code® (NEC) as well
as in damp, wet, or corrosive locations.
CAUTION
To reduce the risk of ignition of hazardous atmospheres, do not use in
Class II, Group F locations that contain electrically conductive dusts.
!
The interlocked receptacle and mating plug cannot be made or broken
under load.
The circuit breaker cannot be closed until the plug is fully inserted into the
receptacle. When the plug is fully inserted and the circuit breaker closed,
the plug cannot be removed until the breaker is opened.
ENCLOSURE INSTALLATION
1. Install conduit sealing fittings into EPC enclosure hubs before fastening
unit to mounting location for installation of conduit and power supply
wires.
2. Select mounting location that will provide suitable strength and rigidity
for supporting the unit and all contained wiring. Be sure to provide
adequate space for insertion and removal of the plug.
3. Fasten unit to mounting location: Position top keyway slot onto 5/16
inch diameter bolt or lag screw; level unit; then secure bottom at
two open slots with 5/16 inch diameter bolts or lag screws. Refer to
DIMENSIONS section of these instructions.
4. Depress locking tab and remove top cover using a standard pinch bar
or similar tool as a pry between the notches on the rim of the cover
and the lug attached to the center section of the enclosure.
5. Install circuit breaker into units supplied without one.
• Select the proper circuit breaker from Table I.
• Secure circuit breaker to mounting plate in location indicated on
mounting plate label.
• Secure upper operating rod guide with two upper circuit breaker
mounting screws.
• Adjust operating rod bracket as necessary to captivate circuit
breaker toggles.
6. Install wiring. Refer to WIRING CONNECTION section of these
instructions.
7. Check wiring per ELECTRICAL TESTING section of these instructions.
8. Replace top cover.
WARNING
To prevent ignition of hazardous atmospheres, disconnect the device
from the supply circuit before opening. Keep tightly closed when in
operation. Conduit runs must have a sealing fitting connected within 18
inches of the enclosure.
Electrical power must be off before and during installation and
maintenance.
!
CAUTION
• Hazardous location information specifying class and group listing of
each device is marked on the nameplate of each enclosure.
• No conduit openings are to be added in the field.
• All unused conduit openings must be plugged. Plug must engage a
minimum of five full threads and be a minimum of 1/8 inch thick.
• All conduits entering and leaving the enclosure, must be sealed
with explosionproof seals within 18 inches of the enclosure.
• Conduit sealing fittings must be installed in each attached conduit
run to comply with the latest edition of the NEC Section 501-5 and/
or 502-5 plus any other applicable code.
!
30, 60 and
100 ampere
size EPC
®National Electrical Code is a Registered Trademark of the National Fire Protection Association.
IF 267 • 04/20 Copyright © 2020, Eaton’s Crouse-Hinds Division Page 1
CAUTION
• Check for dirt, grit or other foreign material on the threads. If any
such material settles on these threads, clear them with kerosene or
Stoddard solvent*, then lubricate with Crouse-Hinds Company Type
STL thread lubricant.
*To avoid the possibilities of an explosion, oxidation and corrosion, do
not use gasoline or similar solvents.
!

IF 267 • 04/20 Copyright © 2020, Eaton’s Crouse-Hinds Division Page 2
WIRING CONNECTION
Determine the type of distribution system to be used that will comply with
NEC requirements and ensure grounding continuity.
Proper grounding of systems and circuit conductors is required to limit
hazardous voltages caused by lightning, line surges or unintentional contact
with higher voltage lines and to stabilize the voltage to ground during
normal operation. All conductive materials that enclose the electrical
conductors or attached equipment or forming part of such equipment must
be grounded. A permanent conducting connection must be made between
all such equipment and the earth.
Pull all power supply conductors into enclosure and make connections to
the line side of the circuit breaker following the wiring pattern established
for your system.
The Arktite receptacles on the EPC enclosures are polarized so that mating
plugs can enter the receptacle only one way. Also, the mating contacts in
the receptacle and corresponding plug are identified by numbers on the
insulating recesses. Note: Some Arktite plugs manufactured prior to 1982
identify the mating contacts by color. Contact members in the receptacle
always mate with those in a plug identified by the same number {or color).
This assures proper polarity or phase rotation of conductors through
receptacle and plug.
Usually the conductors in a cable or conduit system are identified by the
color of the insulation covering each individual conductor. We assume
that these colors agree with those given in Section 210-5 of the National
Electrical Code for multi-wire branch circuits; also, that there is an additional
wire in the cable or conduit system that is uninsulated or identified green
that is for grounding and complies with Sections 250-42 and 250-45 of
the National Electrical Code. If the conductors are not identified with
exactly these colors, these colors may be assumed when making proper
connections.
WARNING
EPC Series enclosures must be securely attached into a permanently
grounded conduit system in accordance with Article 250 of the National
Electrical Code.
!
WARNING
Before installing an EPC Series enclosure with interlocked Arktite
receptacle, a wiring pattern must be established for your system.
Locations having different voltages, frequencies or types of current {AC
or DC) MUST NOT have interchangeable attachment plugs as stated in
paragraph 210-7F of the National Electrical Code.
!
Circuit breaker Enclosure
Receptacle
with spring
door housing Rating
Hub
size
Circuit
breaker
amperage
Cat. #
Without circuit
breaker
With circuit breaker
Cat. #
Cutler-Hammer
“EHD”
Cat. #
General Electric
“TED”
30A
2-wire, 3-pole
Style 2
2-pole, 480 VACA
or 250 VDC 600 VACB11/4”
20
EPC43032
EPC43032 WT20 2 EPC43032 TT20 2
30 EPC43032 WT30 2 EPC43032 TT30 2
40C EPC43032 WT40 2 EPC43032 TT40 2
50C EPC43032 WT50 2 EPC43032 TT50 2
30A
3-wire, 4-pole
Style 2
3-pole, 480 VACA
or 250 VDC 600 VACB11/4”
20
EPC43042
EPC43042 WT20 3 EPC43042 TT20 3
30 EPC43042 WT30 3 EPC43042 TT30 3
40C EPC43042 WT40 3 EPC43042 TT40 3
50C EPC43042 WT50 3 EPC43042 TT50 3
60A
2-wire, 3 pole
Style 2
2-pole, 480 VACA
or 250 VDC 600 VACB
11/4”
50
EPC46032
EPC46032 WT50 2 EPC46032 TT50 2
60 EPC66032 WT60 2 EPC66032 TT60 2
70C EPC66032 WT70 2 EPC66032 TT70 2
2” 90C EPC66032 EPC66032 WT90 2 EPC66032 TT90 2
100C EPC66032 WT100 2 EPC66032 TT100 2
60A
3-wire, 4-pole
Style 2
3-pole, 480 VACA
or 250 VDC 600 VACB
11/4”
50
EPC46042
EPC46042 WT50 3 EPC46042 TT50 3
60 EPC66042 WT60 3 EPC66042 TT60 3
70C EPC66042 WT70 3 EPC66042 TT70 3
2” 90C EPC66042 EPC66042 WT90 3 EPC66042 TT90 3
100C EPC66042 WT100 3 EPC66042 TT100 3
100A
2-wire, 3-pole
Style 2
2-pole, 480 VACA
or 250 VDC 600 VACB2”
60
EPC61032
EPC61032 WT60 2 EPC61032 TT60 2
70 EPC61032 WT70 2 EPC61032 TT70 2
90 EPC61032 WT90 2 EPC61032 TT90 2
100 EPC61032 WT100 2 EPC61032 TT100 2
100A
3-wire, 4-pole
Style 2
3-pole, 480 VACA
or 250 VDC 600 VACB2”
60
EPC61042
EPC61042 WT60 3 EPC61042 TT60 3
70 EPC61042 WT70 3 EPC61042 TT70 3
90 EPC61042 WT90 3 EPC61042 TT90 3
100 EPC61042 WT100 3 EPC61042 TT100 3
AEnclosures with 600V circuit breakers from the U.S. are available. Information available upon request.
BCSA certified units are supplied with 600 VAC FDB frame circuit breakers.
Table 1. EPC Enclosure Circuit Breaker Selection
CAUTION
Selecting a circuit breaker with an ampere rating exceeding that of the Arktite receptacle must
only be done where a momentary in-rush current can be caused by heavy, slow-starting loads,
but where the normal continuous operating current is less than the receptacle rating.
!
WARNING
For each system the same colored wire must be attached to the same
numbered {or color coded) contact on all plugs and receptacles in
that system. This will assure correct system polarity and reduce the
possibility of equipment damage and/or personal injury due to mis-
phasing or electrical shorts. Always test before energizing.
!

IF 267 • 04/20 Copyright © 2020, Eaton’s Crouse-Hinds Division Page 3
If all conductors are alike except one, that one may be assumed to be white
and all the others will probably be in the same relative location from the
white wire at the other end of the same cable. However, lacking positive
color identification of each conductor, ALWAYS test them out electrically.
Assuming conductor color identification as described earlier, connect
conductors identified by color in the proper column in Table II through
corresponding contacts in the plug and receptacle identified by number (or
color) listed. The white wire should always be connected through the #2
contact (or white color code). connections.
*White wire or terminal must not be used for grounding. If one conductor is uninsulated, or identified green, this wire is for grounding the portable device. If no green or bare wire is available, another wire
may be connected through plug and receptacle connections to conduit or some other non-current carrying conductor permanently grounded in accordance with Article 250 of the National Electrical Code.
**Use pressure type termination.
***Arktite plugs manufactured prior to 1982.
NOTE: EPC enclosures identified with the addition of Suffix S4 to catalog number are supplied with receptacle contacts rotated 22-1 /2 degrees for special polarity applications. They are compatible only with
plugs built with the same special feature.
APJ NPJ
Dimensions ‘h’ and ‘hh’ are exposed portion of plug when engaged with receptacle.
Receptacle Breaker a b c d e f g h hh k l
30A 20-50A 24 105/8143/893/8711/16 113/449/16 413/16 7 73/821/16
60A 50A 241/2105/8143/893/8711/16 113/451/16 513/16 613/16 73/821/16
60A 70-100A 241/21213/16 143/893/8711/16 113/451/16 513/16 613/16 91/425/8
100A 70-100A 251/41213/16 143/893/8711/16 113/4513/16 65/873/491/425/8
200A 125-225A 36 18 27 131/2
Receptacle and plug
contact identification
Receptacle
style
Color of
conductors By number
By
color***
Circuit breaker
line connections
2-wire, 3-pole
White*
Black
Green**
Contact #2
Contact #1
GR (grounding
contact)
White
Red
Unidentified
L1
L2
Ground
3-wire, 4-pole
White*
Black
Red
Green**
Contact #2
Contact #3
Contact #1
GR (grounding
contact)
White
Orange
Red
Unidentified
L2
L1
L3
Ground
Table 2
DIMENSIONS
Figure 1. 2-wire, 3-pole, style 2 contact identication
Figure 2. 3-wire, 4-pole, style 2 contact identication
*Polarization keyway or key
(Keyway is groove, key may be
extended form or rivet)
*Polarization keyway or key
(Keyway is groove, key may be
extended form or rivet)

Eaton’s Crouse-Hinds Division IF 267
1201 Wolf Street, Syracuse, New York 13208 • U.S.A. Revision 2
Copyright©2020 Revised 04/20
Supercedes 05/83
All statements, technical information and recommendations contained herein are based on information and tests we believe to be reliable. The accuracy or completeness thereof are not guaranteed. In
accordance with Eaton’s Crouse-Hinds Division’s “Terms and Conditions of Sale,” and since conditions of use are outside our control, the purchaser should determine the suitability of the product for his intended
use and assumes all risk and liability whatsoever in connection therewith.
ENCLOSURE DISASSEMBLY
1. Remove top cover.
2. Disconnect supply conductors attached to line side of circuit breaker
and those connecting the receptacle to load side of circuit breaker.
3. Remove two screws attaching upper operating rod guide to the upper
circuit breaker mounting bracket.
4. Loosen BUT DO NOT REMOVE, the four set screws holding the two
mounting bracket shoes to the center section of the enclosure until
the shoes are free to pivot. Remove circuit breaker mounting bracket
assembly.
5. Remove operating rod assembly by pressing assembly towards
receptacle and rotating clockwise until it is free from operating arm
shaft.
6. Align square hole with interlock shaft and then remove operating rod
assembly.
7. Remove the aligning and locking plate fastened to flat surface on
right side of the receptacle. Unscrew receptacle assembly from EPC
enclosure.
ENCLOSURE ASSEMBLY
1. Replace receptacle assembly. Be sure that receptacle is rethreaded
into enclosure to the original depth noted previously.
2. Place aligning and locking plate over 1/4 inch pin on center section
of enclosure and fasten plate to receptacle assembly using the two
slotted hex head screws.
3. With release lever in the depressed position, replace the circuit breaker
operating rod assembly.
4. Replace the circuit breaker mounting frame, circuit breaker and
operating rod guide.
5. Test the interlock mechanism, complete all wiring connections and
replace upper cover.
INTERLOCK TEST
With the Arktite plug removed from the receptacle it should be impossible
to move operating handle to “on” position.
Insert plug into receptacle. This should actuate the interlocking mechanism
and allow the operating handle to be moved to ON position. The plug at this
time should resist all normal efforts to withdraw it from the receptacle even
while pressing the release lever.
Move operating handle to OFF position, press release lever and withdraw
the plug. It should again be impossible to move the operating handle to the
ON position.
ELECTRICAL TESTING
Do not connect to power until the following electrical tests have been
performed:
• Make continuity check of wiring to verify correct phasing and
grounding connections.
• Check insulation resistance to be sure system does not have any
short circuits or unwanted grounds.
MAINTENANCE
Electrical and mechanical inspection of all components must be performed
on a regular schedule determined by the environments and frequency of
use. It is recommended that inspection be performed a minimum of once a
year.
1. Inspect all wire terminals for tightness. Discoloration due to excessive
heat is an indicator of a possible problem and should be thoroughly
investigated and repaired as necessary.
2. Check grounding and bonding for correct installation and secure
connection.
3. Clean exterior surfaces making sure nameplates remain legible.
4. Inspect housings and replace those which are broken.
5. Check receptacle contacts for signs of excessive arcing or burning and
replace if necessary.
In addition to these required maintenance procedures, we recommend an
Electrical Preventive Maintenance program as described in the National Fire
Protection Association Bulletin NFPA No. 708.
WARNING
Electrical power must be turned off before and during disassembly or
maintenance.
!
CAUTION
Note depth that receptacle housing enters EPC enclosure housing for
reference when reassembling later.
!
WARNING
If any parts of the plug, receptacle or connectors appear to be missing,
broken, or show signs of damage, DISCONTINUE USE IMMEDIATELY.
Replace with the proper replacement part(s) before continuing service.
!