ABSTRACT

Thecurrentratingofthecableandcomponentsmustneverbelessthanthe protectivedevicewhichcontrolsit.Afusedswitchof100Aratingcanonly serveacablehavingacurrentratingof100Aormoreandtheswitchgearatthe oppositeendofthecircuitmustalsobeof100Aratinguptothenextsmaller fuseorminiaturecircuit-breaker.