Main Equipotential Bonding on plastic water main

[twocom]

Hi,

I'm wondering whether our mains water needs to have equipotential bonding on it. The water main enters the property from the front and there is around 10 metres of plastic pipe before it hits metal pipe at the stop cock. The consumer unit is then 10 metres back towards the front door. What are the regulations on a setup like this? Is bonding required?

Thanks,
Paul.

 

[davy_owen_88]

IEE: To bond or not to bond

If the incoming pipes are made of plastic, but the pipes within the electrical installation are made of metal, the main bonding must be carried out. The bonding being applied on the customer side of any meter, main stopcock or insulating insert and of course to the metal pipes of the installation.

The connections of the bonding wired to the pipes has to be made with a proper clamp to BS 951 complete with the label “SAFETY ELECTRICAL
CONNECTION - DO NOT REMOVE.”

If the incoming services are made of plastic and the pipework within the building is of plastic then no main bonding is required. If some of the services are of metal and some are of plastic, then those that are of metal must be main bonded.