Re Kes' post on supplementary bonding in a kitchen.

[securespark]

Hi,

What's the principles behind no longer requiring earth bonding in the kitchen? Does it mean that the bonding we have between the h&c pipes is a) irrelevant, b) a good thing, or c) a bad thing? It was installed in 1997 by the Elec board when we had a new cu. We're one of the rural PME installations by the way, which is probably a.

Rgds.

They have decided there may be a problem with parallel earth paths, so have done away with SB in kitchens in the 16th edition.

 

[Spark123]

Supplementary bonding in a domestic kitchen is not wrong, it is just no longer necessary.

 

[JohnD]

I've heard the parallel paths idea, but am not convinced. For example, in my kitchen, the cold tap is connected to the incoming main - which is main-bonded a few metres away. It then continues into the bathroom, where it is supplementary bonded. The hot pipe is also supplementary bonded in the bathroom.

Beside the sink is the boiler, whose pipes are supplementary-bonded to the ring that supplies it. Beside the boiler is a Freezer, fed from a dedicated radial circuit.

To the other side of the sink is the cooker, whose gas-pipe is main-bonded a few metres away. The cooker is also fed from another dedicated radial circuit.

I can't see that I would be any worse off if all the pipes and CPCs in the kitchen were bonded to each other.

p.s. I always encourage my female guests to be naked and wet when in the kitchen.