#1 21662593 13 Jun 2012 12:28 ASAD ALI ASAD ALI Anonymous Post #1 21662593 13 Jun 2012 12:28 Is any one tell me about the basic operating principal of 4 pole ELCB??
#2 21662594 13 Jun 2012 22:14 Frank Bushnell Frank Bushnell Anonymous Post #2 21662594 13 Jun 2012 22:14 http://en.wikipedia.org/wiki/ELCB
#3 21662595 14 Jun 2012 03:59 Olivier Bouilliez Olivier Bouilliez Anonymous Post #3 21662595 14 Jun 2012 03:59 More onhttp://www.electrical-installation.org/enwiki/Residual_current_differential_devices_(RCDs)