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?

wrote:
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?

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

"Lobster" wrote in message
...
wrote:
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?

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!

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