WEG Molded Case Circuit Breakers - User’s Manual
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WEG Molded Case Circuit Breakers - User’s Manual
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2. If the circuit breaker includes factory or field installed internal accessories, make
sure the accessory wiring can be reached when the circuit breaker is mounted.
Note: Labels with accessory connection schematic diagrams are provided on the side of the circuit breaker.
A note should be made of the diagrams if the labels cannot be seen when the circuit breaker is mounted.
3. Position the circuit breaker on the mounting surface.
4. Secure the circuit breaker with the supplied hardware.
2.4. CONNECTING LINE AND LOAD CONDUCTORS
Caution
Overheating can cause nuisance tripping and damage to the circuit
breaker. When aluminum conductors are used, the application of a
suitable joint compound is recommended to reduce the possibility of
terminal overheating.
Connect line and load conductors and accessory leads.
After the circuit breaker is installed and all connections are made, check all mounting
hardware and terminal connection hardware for torque loading. Torque values for line/
load terminal lugs are given on table in Figure 2. Torque mounting screws for terminals,
bus connections and front conductor extensions to 30-35 lb-ft. (41-47 Nm).
Re-install load end and line end covers and secure with pan head screws provided.
Torque large screws to 35-45 lb-in. (4.0-5.0 Nm) and small screws to 24-30 lb-in.
(2.7-3.4 Nm). When using the terminal LT1B2 UBW700, or when prospective fault
currents of cabled installations exceed 65 kA (such as NDC applications), the
conductors are to be braced in accordance with Figure 5.
