Kenneth Cybart, Littelfuse


Arc Flash & Electrical Safety July 15, 2007

Identify the ‘right’ limit on selective coordination

In 2005, the National Electric Code was changed to require selective coordination of circuit protection for emergency circuits and legally-required standby systems. Its goal was to ensure that if one circuit overloaded or faulted, it would not cause a blackout or other circuits to lose power in places like hospitals and elevators, where losing power could be hazardous.

By Kenneth Cybart, Littelfuse
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