Thomas&Betts Russellstoll 9MT Series User manual

3
2
7
5
4
6
1
8
BREAKER
CIRCUIT
G
Z
Y
X
T1 T2 T3
L3L2L1
GROUNDING HUB
LOAD SIDE
LINE SIDE
- PREWIRED -
(BACK OF)
RECEPTACLE
3P4W: X/L1,Y/L2(N),Z/L3,G/
2P3W: X/L1(N),Y/L2,G/
GROUND
TERMINAL
(3P4W SHOWN)
Russellstoll®
Instruction Sheet for DuraGard®Safety Interlock
Catalog Number Series 9MT
When your application calls for the utmost in safety and reliability,
circuit breaker protected DuraGard®Safety Interlocks provide the
industry’s only breaker protected premium nonmetallic interlocked
outlet. Molded from DuraV®high performance thermoplastic,
Russellstoll®DuraGard®Safety Interlocks can be used in industrial,
commercial and process manufacturing environments. UL listed as
enclosure type 4X (screw cap version). Flap cap version available for
indoor use only.
Interlocks are available in 30 or 50 Amp ranges, either 2p3w or 3p4w
with 5 standard polarizations to a maximum 3p4w, 480vac rating.
DuraGard®applications can include:
o Maintenance and repair facilities
o Shipyard welding stations
o Job site temporary power stations
o Data Center /hardware protected outlets
o Portable equipment & mobile generators or lighting
o Industrial power outlets for factories
PREPARATION
1. Recommended Tools & Accessories
Cable Cutters Wire Strippers
Slip Jaw Wrench Torque Wrench
Screw Drivers Allen Wrench
Ohmmeter Liquid-tight Conduit Fitting
2. Turn handle #8 to “OFF” position.
3. Note Fig. A. Cutaway. Remove cover #3 (4 screws #2) if attached
to base. Mount base to wall or I-beam at a de-energized
power drop with receptacle facing down, using adjustable swing-
out mounting feet #1 for 4-point or center hung 3-point screw
mounts. Tighten mounting screws to 20 in. lbs. Select wire
/cable based on allowable ampacity Fig. B. If conduit entry, set and
tighten conduit tting, with O-ring between enclosure and threaded
hub.
4. Attach ground wire #4 per schematic (Fig. C), to grounding hub #7.
Establish wiring so that same colored/numbered
circuits are maintained through each junction, with special
attention to grounding lead connection.
5. Loosen pressure screws #5 on terminals of circuit breaker #6 and
neutral block if used. Strip wire ends (from
conduit ) to 5/8” and insert into breaker terminals
(line side). Tighten to value shown on breaker
(See Fig. C).
6. Make sure disconnect handle #8 is in “OFF” position and
reassemble cover #3 with screws #2 at max. 20 in. lbs. torque.
Verify proper operation per “Electrical Testing” and “Operation”
procedures.
7. Note catalog number, date and le instruction sheet for
reference. See “OPERATION” section and instruct
personnel accordingly.
FIG. A
TA01935 E Page 1 of 2
DuraGard®
Ampere Rating
Maximum Cable Size
AWG 60°C
30 #8 7 STRAND
#8 FLEXIBLE (or building wire)
50 #6 7 STRAND
#6 FLEXIBLE (or building wire)
FIG. B
FIG. C
WARNING
Risk of electrical shock. De-energize all power prior
to installation or repair

WARNING
© 2008 Thomas & Betts. All Rights Reserved.
WARRANTY: Thomas & Betts sells this product with the understanding that the user will perform all necessary tests to determine
the suitability of this product for the user’s intended application. Thomas & Betts warrants that this product will be free from defects in
materials and workmanship for a period of ninety (2) years following the date of purchase. Upon prompt notification of any warranted
defect, Thomas & Betts will, at its option, repair or replace the defective product or refund the purchase price. Proof of purchase is
required. Misuse or unauthorized modification of the product voids all warranties.
Limitations and Exclusions: THE ABOVE WARRANTY IS THE SOLE WARRANTY CONCERNING THIS PRODUCT, AND IS IN
LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, WHICH ARE SPECIFICALLY DISCLAIMED. LIABILITY
FOR BREACH OF THE ABOVE WARRANTY IS LIMITED TO COST OF REPAIR OR REPLACEMENT OF THE PRODUCT,
AND UNDER NO CIRCUMSTANCES WILL THOMAS & BETTS BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL OR
CONSEQUENTIAL DAMAGES.
Thomas & Betts Corporation
Memphis, Tennessee
www.tnb.com TA01935 E Page 2 of 2
ELECTRICAL TESTING
Do not connect to power until the following electrical tests
have been performed.
1. Make continuity checks of wiring with ohmmeter to verify
correct phasing and grounding connections.
2. Check insulation resistance to be sure system does not
have any short circuits or unwanted grounds.
Turn the power on and test the system, before connecting to
any load.
MAINTENANCE
Inspection of electrical equipment used in industrial and heavy
use situations must be conducted regularly to ensure proper
function and safety.
Check for the following during inspection:
1. Unsecured contact wire terminals
2. Cracked or broken housings
3. An unfastened or loose ground conductor
4. Deteriorated or misplaced gaskets
5. Loose or missing screws
6. Frayed or broken insulation on wires
7. Damaged O-rings
OPERATION
To Operate Switch
1. Insert plug.
2. Tighten screw collar completely.
3. Turn handle to ON position for power.
4. Turn handle to OFF position to turn off power.
To Remove Plug
1. Turn handle to OFF position.
2. Loosen screw collar.
3. Remove plug.
For Tripped Breaker Handle in Trip Position
1. Turn handle past OFF position to reset breaker.
2. Turn handle to ON position for power.
(plug must be properly inserted)
If any part of the interlock appears to be missing or damaged.
DISCONTINUE USE IMMEDIATELY. Replace with factory
replacement parts only before continuing use.
MAINTENANCE MANAGER: Please record the
following information for your records.
COMPLETE CATALOG NO.
(As shown on device label)
DATE OF INSTALLATION