White Paper Abstract

An Electrical Win-Win Solution and Best Practice

Christopher Johnston, Senior Principal

In Critical Facilities, the electrical load on the critical (UPS output) bus is a continuous load that rarely changes (except to increase!). A 100%-rated circuit breaker will carry 100% of its rating continuously, but an 80%-rated circuit breaker will carry only 80% of its rating. Why are 80%-rated circuit breakers specified for continuous loads? By specifying 100%-rated circuit breakers we can reduce first cost (CAPEX) and increase availability.

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