NOARK - Essential Components Catalog

A molded case circuit breaker can be used to provide overload and short circuit protection for cables, control panels, motors and branch circuits. In addition, the National Electrical Code (NEC) requires the following when controlling a motor: • A means of disconnecting power from the circuit • Short circuit protection for the cables • A way to start and stop the motor (typically a contactor) • Overload protection for the motor (typically an overload relay) The molded case circuit breaker can provide the means to disconnecting power and provide short circuit protection under UL 60947-4-1 type C protection. The magnetic only Motor Circuit Protector (MCP) can provide the same function under UL 60947-4-1 type D protection. Molded Case Circuit Breakers UL 489 and UL 60947-4-1 (formerly UL 508) Applications TYPE C Components Catalog Number Product Molded Case Circuit Breaker (MCCB) M1S Contactor EX9C Overload Relay Ex9R TYPE D Components Catalog Number Product Motor Circuit Protector (MCP) M1M Contactor EX9C Overload Relay Ex9R 1