Branch-Circuit, Feeder and Service Calculations, Part XXI

摘要

Load calculation requirements are in Article 220 of the National Electrical Code (NEC). It provides requirements for calculating branch-circuit, feeder and service loads. The Code divides requirements in Article 220 into five parts. Part Ⅰ covers general requirements for calculation procedures. Part Ⅱ provides calculation provisions for branch circuits. Part Ⅲ contains feeder and service calculation requirements (sometimes referred to as the standard method).