When circuit breakers are installed in Class I locations, they must be________ .
A) dustproof
B) dust-ignitionproof
C) explosionproof
D) waterproof

Name: When circuit breakers are installed in Class I locations, they must be________ . A) dustproof B) dust-ignitionproof C) explosionproof D) waterproof
Brand: Quizplus
Rating: 4.8 (34 reviews)

Question

Quizplus · Accepted Answer

Circuit breakers in Class I locations, which are areas where flammable gases or vapors may be present, must be explosionproof to prevent ignition of the surrounding atmosphere.

When Circuit Breakers Are Installed in Class I Locations, They