Using NFPA 70E to Stay Alive

James R. White, Shermco IndustriesColumns, Summer 2019 Columns, Tech Quiz

This month’s Tech Quiz takes a bit different look at NFPA 70E requirements. What is involved in electrical testing? As with most things, it’s not as simple as it may seem. 1. If you are a crew leader, what is the first thing you would do to test a transformer? a. De-energize it b. Isolate it by lockout/tagout (LOTO) c. …

Sulphur Hexafluoride Circuit Breakers

James R. White, Shermco IndustriesColumns, Spring 2019 Columns, Tech Quiz

Sulphur hexafluoride circuit breakers used to be the domain of utilities, but they are liable to be used now by any large- or medium-size industrial. This Tech Quiz will review some of the NETA standard requirements for these circuit breakers. 1. In ANSI/NETA ATS, which ANSI/IEEE standard is referred to if manufacturer’s data is not available? a. C57.04 b. C57.11 …