consumer unit mixed messages

[ezzzekiel]

main bonding should be upgraded to 10mm and the earthing conductor to 16mm.

actually this is not stictly correct, if the bonding has been in place for some time and shows no signs of degrading or thermal damage it can be left in situ.

Alterations and additions in domestic and similar premises : Electrical Safety Council



Q12. When carrying out electrical work on an installation forming part of a TN-C-S system, is it necessary to upgrade existing 6 mm² protective equipotential bonding to 10 mm²?

Not necessarily. If the existing 6 mm² bonding connects all the extraneous-conductive-parts to the main earthing terminal, has been in place for a significant time and shows no signs of thermal damage, then it may not require to be upgraded.

Regulation number(s)

• 132.16
• 544.1.1

 

[telectrix]

nice bit of clarification there ezzz. nice one.

 

[mechelec]

I can not find reg 132.16 in my BRB it has 132.15.2 have i missed an amendment ?