earths??

[gpz900jim]

I have to fit a power shower as a replacement to an existing one. The shower is rcd protected, measured zs reading is within acceptable limits, for a 0.4 second disconnection time, but the main earthing conductors to the gas and water are not up to current spec. Will I have to change them? or will they be ok left, given that the zs is ok?? cheers jim

 

[pushrod]

If it is not an identical replacement ie addition or alteration then yes you have to upgrade earth and bonding. If it is an identical replacement and the present bonding/earth show no sign of of overheating and were correct at time of previous install i believe it is not an absolute must - however i would encourage the client to upgrade.

 

[sjm]

When you say that the bonding is not up to current spec do you mean that they are in place only the cable is 6mm and not 10mm? If so check out www.esc.org.uk/forum alterations and additions.