Equipotential bonding

[eckersecker]

Ok hard hat on. Ive wired a garage with a water pipe. Ive taken a 10 mm back from the pipe to the MET in the house (TNS). The board in the garage is RCD protected. So far all the same as the IEE Supplying a Detached Out building booklet recommendations. Can I run another 10 mm from the pipe to the earth bar in the garage consumer unit? This would help reduce the Zs readings of the garage consumer unit and in my opinion make the installation safer.

 

[Deleted member 9648]

Cant see why you'd want to....if the Zdb is high you need to look at the design of your distribution circuit to the garage or the Ze at the intake. If the Zdb is not high why bother?....Aside from that I cant see an issue if you do want to connect to the garage CU.

 

[eckersecker]

well it would mean in effect that the garage board had an extra 10 mm earth all the way back to the board. which, although belts and braces , should increase safety.