K
KAS1
Why is this not a simple thing for people to get their heads around. It's so simple, the 0.05ohms is just a recommended value between two or more conductive parts ie pipes or steel structure which may or may not be connected together by a BONDING CONDUCTOR and the MAIN BONDING CONDUTOR'S resistance is dependant on the size and length of the cable , which should be determined by calculation and/or the size of the EARTHING CONDUCTOR simple. I REPEAT THE 0.05ohms HAS NOTHING TO DO WITH THE MAIN BONDING CONDUCTOR'S resistive value. The main bonding conductor is from the MET to a pipe or steel structure and a bonding conductor is between two pipes or metalwork that requires bonding to met the requirements of BS7671.