3
2
7
5
4
6
1
8
BREAKER
CIRCUIT
G
Z
Y
X
T1
T2
T3
L3
L2
L1
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 fi 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 fi 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
