Molded Case Circuit Breakers Molded Case Switches And Circuit Breaker Enclosures

This edition of nmx j 266 ance supersedes the previous edition published on january 15 2013.

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

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. Molded case circuit breakers are electrically operated switches that provide electrical circuit protection against both overloads and short circuits in low voltage distribution systems. 5 and the thirteenth edition of ul 489. This harmonized standard has been jointly revised on april 22 2019.

M p and r frame molded case circuit breakers powerpact 800 a m frame powerpact 1200 a p frame. Abb s formula molded case circuit breaker line offers simplicity and quality in some of the smallest dimensions available.