Molded Case Circuit Breakers Molded Case Switches And Circuit Breaker Enclosures

It is the fifth edition of nmx j 266 ance the fourth edition of csa c22 2 no.

Molded case circuit breakers molded case switches and circuit breaker enclosures.

This is the harmonized ance csa group and ul standard for molded case circuit breakers molded case switches and circuit breaker enclosures. There are two types of molded case circuit breakers thermal magnetic and solid state solid state thermal magnetic solid state trip unit molded case breakers are listed to ul 489. This edition of nmx j 266 ance supersedes the previous edition published on january 15 2013. It is the fifth edition of nmx j 266 ance the fourth edition of csa c22 2 no.

A molded case circuit breaker is defined as a circuit breaker that is assembled as an integral unit in a supportive and enclosed housing of insulating material basically a molded plastic case. 5 and the thirteenth edition of ul 489. This is the harmonized ance csa group and ul standard for molded case circuit breakers molded case switches and circuit breaker enclosures. Insulated case circuit breakers and molded case circuit breakers there are two main classifications of low voltage circuit breakers molded case circuit breakers and low voltage.

5 and the thirteenth edition of ul 489. Molded case circuit breakers are electrically operated switches that provide electrical circuit protection against both overloads and short circuits in low voltage distribution systems.