In the electrical industry, a new method of protecting workers from arc energy is gaining popularity: prevention through design. Simply speaking, the design and installation of equipment or systems incorporates inherent safety features that protect workers from serious arc-flash injuries or death. The 2011 National Electrical Code (NEC) added Section 240.87, Non-instantaneous Trip, achieving safety measures through a reduction of arc energy on the load side of all circuit breakers that were not equipped with an instantaneous trip function (non-instantaneous trip types).
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