Visibility of supplementary bonding in bathrooms etc

[freeway_rider_813]

The diagrams for supplementary bonding in bathrooms etc given in OSG fig 4d & 4e & in the "IEE Elec Guide to the Bldg Regs" figs 5.3a & b are reasonably clear.

What is not clear is how much of the bonding conductor may be run out of sight.

For instance, if copper pipes enter the bathroom at separate points and connections between them are out of sight behind a ceiling or under a floor (and in the case of the CH fed radiator a long way off), can the linking yellow/green insulated bonding conductor be also run out of sight?

In other words, how visible does supplementary bonding have to be?

[Lobster]

IANAE but I've certainly always hidden mine under floorboards etc and never been pulled up on it - I think more important is the visibilty of the earth clamps - eg if an inspector can see a cable disappearing under the floor behind the basin, heading towards the rad where another cable can be seen emerging, then it would be pretty tough of him to play devil's advocate and assume the two weren't connected! Behind a removable bath panel - with sections of missing floorboards beneath - is a good hiding place for cable etc as it can easily be seen where it runs.

David

[ARWadsworth]

It is the accessibility of the clamps that is important. It is of course very easy to remove the cable from the clamps and test that the cable is continuous under the floorboard. Connections under a floor in a bathroom are not usually considered inspectable. The usual places to hide the clamps are behind removable bath panels and behind sink pedestals. You can make all the conections under the floorboards if they are soldered not clamped connections, this will make an inspection very difficult, but you could take photographs of the connections.

Adam