Do you need to earth bond bathroom if it is on RCD?

techmob

As title says do you have to earth bond a bathroom if it is on an RCD?

thanks

andyhop

Only incoming gas and water suppliers within 1m of isolation valves need to be earth bonded

albert_s

there are 3 requirements in BS7671 to negate supplementary equipotentional earth bonding and all 3 conditions must be met,
in most cases though provided that EVERY circuit in the dwelling (not just the bathroom) is 30mA RCD protected then cross bonds can be omitted.
if in doubt consult a suitably qualified and competent person.

thescouselander

albert_s wrote: »

there are 3 requirements in BS7671 to negate supplementary equipotentional earth bonding and all 3 conditions must be met,
in most cases though provided that EVERY circuit in the dwelling (not just the bathroom) is 30mA RCD protected then cross bonds can be omitted.
if in doubt consult a suitably qualified and competent person.

Could I just clarify? If you have a split breaker box with the light circuits not on an RCD but everything else on an RCD then earth bonding will still be required - correct?

fluffpot

Yes that's right. In some cases it's easier, cheaper and neater to get a sparks to test the bathroom lighting circuit and install RCD protection to it rather than install supplementary bonding in the bathroom

thescouselander

Interesting. We don't have bonding on our 12 year old house (as far as I can see anyway) and I assumed this was because we had an RCD. Any idea what the rules where 12 years ago - should we have bonding or not?

zax47

Even easier to shove the lighting (and any other unprotected circuits) on RCBOs, voila - all RCD protected and no need for supplementary bonding.

techmob

Hi guys

i am having my electrics done at the moment by a qualified engineer. i asked about bonding and he is the one that said the regs say you don't need bonding now as the bathroom is going to be on an RCD. The water that comes in is going into a plastic pipe and he said that doesn't need bonding. i was running it past you guys on here just so i am 100% sure things are right

does the boiler need bonding?

where else should i expect bonding?

thanks

albert_s

thescouselander wrote: »

Interesting. We don't have bonding on our 12 year old house (as far as I can see anyway) and I assumed this was because we had an RCD. Any idea what the rules where 12 years ago - should we have bonding or not?

12 years ago was 16th edition and lights and such like were not required to have 30mA protection,
but supplementary bonding was required.
to answer your question,
yes, you should have bonding in place if you have circuits not RCD protected.

techmob

how do you know if a circuit is RCD?

albert_s

techmob wrote: »

Hi guys

i am having my electrics done at the moment by a qualified engineer. i asked about bonding and he is the one that said the regs say you don't need bonding now as the bathroom is going to be on an RCD. The water that comes in is going into a plastic pipe and he said that doesn't need bonding. i was running it past you guys on here just so i am 100% sure things are right

does the boiler need bonding?

where else should i expect bonding?

thanks

everything must be on RCD protected circuits to negate requiring supplementary bonding.
boilers that meet BS do not require separate bonding, they are bonded inherently by the manifold, but, manufacturers instructions must always be followed so if they say bond, then bond,,,,,,,,

is all the house water plastic? otherwise it may require bonding, ask him what the resistance readings of the pipes are,(wander lead test), they may be low enough to not require bonding.