George Farrell, Cary, Ill.


Building Automation and Controls December 1, 2005

The Debate Over Circuit Breakers vs. Fused Solutions Continues

I have a number of reservations about the technical issues in Mr. Lane's articles, which broke down changes to the NEC and suggested fused distribution may not always be necessary when considering selective coordination requirements. Both circuit breaker (CB) and fused systems provide safe and reliable overcurrent protection when systems are carefully engineered, installed and maintained. But there are significant differences that must be recognized. The first problem with all three articles is they do not look at a complete system.

By George Farrell, Cary, Ill.