00497nam 2275200 450000100060000000300230000600500090002900800410003808200080007907200130008702000180010010000180011826000310013625000060016724500640017365000130023765000400025065000150029075200StarLibrary Marc Built20180420201711 ||||| |||||||||||amh  a621 aEarthing a0-7506-5215-2 aBrian Scaddan bNEWNES-Butterworths c2001 a2 aIee 16 Edition Wiring Regulations explained ind illustrated aEarthing aFundamental requirements for safety aProtection