Basic Engineering Circuit Analysis 11th Edition by David Irwin ,Robert Nelms

تمرين 27

A number of 120-V rms household fixtures are to be used to provide lighting for a large room. The total lighting load is 8 kW. The National Electric Code requires that no circuit breaker be larger than 20 A rms with a 25% safety margin. Determine the number of identical branch circuits needed for this requirement.