Hi,
I read on your 'projects' area that supplementary bonding in bathrooms should be done using 4mm cunductors and I am looking for this to be confirmed as I was under the impression that is should be 10mm.
I got the 10mm from the On Site Guide page 37 table 3.3.3 where the protective conductor is 16mm. I'm presuming that this is referring to the main protective conductor at the CU. However I must admit that a 4mm or even 6mm supplementary earth bonding would seem to be more appropriate.
Thanks in advance ... Peter