Medium-Voltage Power System Components

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

The Tech Quiz questions for this issue concern medium-voltage power system components. FREE QUESTION! What is medium-voltage? Great question, as there are varying answers from NETA, NEMA, NFPA, and IEEE. NETA’s Standards Review Council has defined and classified medium-voltage within the NETA standards as “a class of nominal system voltages greater than 1,000 volts and less than 100,000 volts,” which …

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 …

Working with Circuit Breakers Safely

James R. White Cover Story, Spring 2021 Cover Story

Circuit breakers come in several types of operating styles differentiated by what they use to safely extinguish an arc in a circuit, including air, air-magnetic, vacuum, and SF6. While most older circuit breakers were manufactured in the United States, mostly by companies such as Westinghouse Electric, General Electric, and Federal Pacific, today many circuit breakers are imported. Older companies merged …

Committee Reports: NEC CMP-13, NFPA 70B, ASTM F18, NFPA 70E

James R. White Specifications & Standards, Spring 2021 Specifications & Standards

NEC CMP-13 NEC CMP-13 covers Articles 700 Emergency Systems, 701 Legally Required Standby Systems, 702 Optional Standby Systems and 708 Critical Operations Power Systems (COPS). The Task Group’s sessions on October 22-21 ran five hours due to the high workload. Earlier, the Correlating Committee asked Jim Dollard (CMP-13 Vice Chair) to develop a “Safety by Design” annex with a Task …

Protective Relaying

James R. White Columns, Tech Quiz, Winter 2020 Columns

This edition of Tech Quiz covers protective relays. Many years ago, as I was teaching a protective relay class, a student asked, “What are these things?” I replied, “Relays,” to which he answered, “No, relays are those little black plastic things that go click-click.” I made sure to call them protective relays from then on. Things in the protective relaying …

Cable Testing

James R. White Columns, Fall 2020 Columns, Tech Quiz

Cable testing is one of the oldest forms of testing in the industry. At first, cables were tested using DC voltages, but this was found to damage newer cable types, so additional cable testing methods were developed. This issue’s Tech Quiz takes a look at cable testing. 1. During the early years of cable testing, which two primary types of …

ASTM F18 Committee Report

James R. White Fall 2020 Specifications & Standards, Specifications & Standards

The semi-annual ASTM-F18 Committee Meeting on May 28, 2020, was hosted on the WebEx app. This takes the place of the April meeting that was scheduled in Boston and cancelled due to the COVID-19 crisis. There were 74 participants. F1506 Antitrust laws were read first. The first and only subject was F1506 arc-rated face masks, which are similar to a …

Safety First, Last, and Always

James R. White Columns, Summer 2020 Columns, Tech Quiz

Everyone says they want to be safe, but when you get right down to it, some are more serious — or possibly they understand the consequences of incorrect decisions more accurately — than others. Whoever performed the repair in this photo did not have a clue what they were doing or the possible consequences of such shoddy work. Thankfully, we …

Troubleshooting

James R. White Columns, Spring 2020 Columns, Tech Quiz

This issue of NETA World covers troubleshooting. A big part of that is being able to interpret a schematic, and some of the most difficult are those for circuit breakers (unless you work in the circuit breaker shop, I suppose). Give these questions a try. Here’s a big call-out to retired Instructor Craig Nelson, who got tired of my hand …