by plumbbob »
Tue Jun 24, 2008 7:42 pm
Absolutely definitely not!
Earth bonding (assuming a domestic property) must be 10mm cable directly earthed at the consumer unit.
Apart from the huge difference in the cable size if the lighting circuit were to develop a fault, it is conceivable the metal you intend to bond may become live.
What exactly are you bonding?
It would be better to post an electrical question to the electrics forum rather than the plumbing forum.