Low-Voltage Circuit Breakers

James R. White Columns, Spring 2021 Columns, Tech Quiz

This edition of the Tech Quiz discusses one thing we all deal with, either at home or at work: low-voltage circuit breakers. Typically, they can last for years without causing problems, but they do require some maintenance and care. Continue on to find out what’s in store for you!

1. When the topic of low-voltage circuit breakers comes up, what are we really discussing?

a. Low-voltage power circuit breakers

b. Insulated-case circuit breakers

c. Molded-case circuit breakers

d. All of the above types of circuit breakers

2. What type of circuit breaker has drawout construction?

a. Low-voltage power circuit breakers

b. Insulated-case circuit breakers

c. Molded-case circuit breakers

d. All of the above types of circuit breakers

3. Which ANSI/NETA MTS-2019 section covers low-voltage power circuit breakers (you do have your copy ready, right)?

a. 7.6.1.1 Circuit Breakers, Air, Low-Voltage Power

b. 7.6.1.2 Circuit Breakers, Air, Low-Voltage Power

c. 7.6.1.3 Circuit Breakers, Air, Low-Voltage Power

d. None of the above circuit breaker sections

4. How many subsections are there in the Circuit Breaker, Insulated-Case/Molded-Case requirements, and where is the second subsection?

a. 6 sub-sections; Visual and Mechanical Inspection

b. 5 sub-sections; Electrical Tests

c. 4 sub-sections; Electrical Tests

d. 3 sub-sections; Visual and Mechanical Inspection

 

 

James (Jim) R. White, Vice President of Training Services, has worked for Shermco Industries Inc. since 2001. He is a NFPA Certified Electrical Safety Compliance Professional and a NETA Level 4 Senior Technician. Jim is NETA’s principal member on NFPA Technical Committee NFPA 70E®, Electrical Safety in the Workplace®, NETA’s principal representative on National Electrical Code® Code-Making Panel (CMP) 13, and represents NETA on ASTM International Technical Committee F18, Electrical Protective Equipment for Workers. Jim is Shermco Industries’ principal member on NFPA Technical Committee for NFPA 70B, Recommended Practice for Electrical Equipment Maintenance and represents AWEA on the ANSI/ISEA Standard 203 Secondary Single-Use Flame Resistant Protective Clothing for Use Over Primary Flame Resistant Protective Clothing. An IEEE Senior Member, Jim received the IEEE/IAS/PCIC Electrical Safety Excellence Award in 2011 and NETA’s Outstanding Achievement Award in 2013. Jim was Chairman of the IEEE Electrical Safety Workshop in 2008 and is currently Vice-Chair for the IEEE IAS/PCIC Safety Subcommittee.