main equipotential bonding

[1983]

Hi all some advice please.

when it comes to main equipotential bonding can i run a 10mm2 from the met to the incoming water pipes and a sperate 10mm to the gas or does it have to be a single 10mm from met to gas and looped on to water pips? and also if the main equipotential bonding is in place do u still need to cross bond the central heating pips?

 

[nickblake]

Has to be a single uncut run from CDU to water then an uncut loop to gas oil etc , or you have to run 2 seperate 10 mm from the CDU

 

[sjm]

nickblake is correct either uncut looped to connect water and gas or 2 x 10mm runs. There is no requirement to bond boiler piework in BS7671 unless it is an extraneous conductive part in it's own right. Check out BS 7671: 2008 | 17th Edition guidance | Electrical Safety Council new or rewired domestic situations.

Cheers
sjm