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WEG Molded Case Circuit Breakers - User’s Manual
4
Caution
When removed and reinstalled, thread forming screws will try to reform
the threads in the base. Care should be taken every time a thread-forming
screw is used to ensure the screw starts in the original threads. Damaged
threads can result in improper circuit breaker cover retention.
4. Replace cover and install pan-head screws followed by thread-forming screws
as shown in Figure 3. Torque cover screws to 18-23 lb-in (2-2.6 N.m.).
5. If not already installed, mount terminals as shown in Figure 4. Secure the
terminals to the circuit breaker using a 7/32-inch socket wrench, and torque to
6-8 lb-ft (8-11 N.m). After mounting the circuit breaker and before installation
of the conductors, the terminal mounting screw can be checked or retightened
through the terminal when the conductor screw is removed. If warning label is
supplied with terminal, place on upper portion of circuit breaker cover.
1
1
1
3P
3P
3P
4P
4P
1
2
2
2
2
2
1
3P
4P
1
2
Figure 3:
cover screw installation positions
1. Screw, No. 8 x 1.88 inch, flat head, cross-recessed, thread forming.
2. Screw, No. 190-32 x 3.125 inch, pan head, cross-recessed.
