Sup bonding code for property with no rcd

chrisreid186 · Nov 22, 2018

What code would you give when doing EICR for a property that has no supplementary bonding in a bathroom, there is no RCD on any circuit but zs and insulation tests are good,

Is it acceptable to measure the resistance between the shower and pipework, if it's under 0.05 ohm's take it as bonded, incase the bonding had been done but covered up?

Nigel · Nov 22, 2018

Actually a very good question.

I would say if everything else tests fine - C3

If all electrical items were Class 2 - C3

If there are Class 1 electrical items then potentially C2.

Deleted account · Nov 22, 2018

I Would and have C2 'd a room containing a bath or shower that has no suplimentary bonding and does not have rcd protection if there is an electric shower.

However I do like essex's take and would consider If it has no electric shower and no class 1 electrical fittings I think I would C3 it in future.

chrisreid186 · Nov 22, 2018

Bathroom has an electric shower, so hoping I can bond from CPC to pipe inside the shower, and that the shower pipe is accessible under bath and use that to bond hot and cold bath taps then take across to sink, also bond from shower isolator pull cord to light pull cord which will intern bond light fitting,

maybe easier to install an RCD

Nigel · Nov 23, 2018

chrisreid186 said:
Bathroom has an electric shower, so hoping I can bond from CPC to pipe inside the shower, and that the shower pipe is accessible under bath and use that to bond hot and cold bath taps then take across to sink, also bond from shower isolator pull cord to light pull cord which will intern bond light fitting,

maybe easier to install an RCD

You may want to think again. If the shower is plastic then what are you hoping to gain from cross-bonding the CPC to the pipe work?

Are the lights, pull cords, isolator also metallic? If not again, what do you hope to gain from cross-bonding to these?

chrisreid186 · Nov 23, 2018

I see what you mean as no exposed conductive parts on shower or pull cords

my idea was to avoid running a cable from the floor to ceiling and that cross bonding the CPC's in pull cords would help lower the resistance between them, now thinking code 3 would be adiquet

ipf · Nov 23, 2018

essex said:
You may want to think again. If the shower is plastic then what are you hoping to gain from cross-bonding the CPC to the pipe work?

Are the lights, pull cords, isolator also metallic? If not again, what do you hope to gain from cross-bonding to these?

Oh yes! let's all go back to the good old 15th Edition.

If he wants to bond the rads, I'm sure I still have the odd one of those special earth bond clips for 'em.

Pauls0212 · Nov 23, 2018

Jesus ... just test it and put the appropriate code... its not rocket science... why c3 if its ok

Pauls0212 · Nov 23, 2018

Tin hat on now

ipf · Nov 23, 2018

Pauls0212 said:
Jesus ... just test it and put the appropriate code... its not rocket science... why c3 if its ok

You called?

Pete999 · Nov 23, 2018

chrisreid186 said:
What code would you give when doing EICR for a property that has no supplementary bonding in a bathroom, there is no RCD on any circuit but zs and insulation tests are good,

Is it acceptable to measure the resistance between the shower and pipework, if it's under 0.05 ohm's take it as bonded, incase the bonding had been done but covered up?

Ian1981 · Nov 23, 2018

Even if the pipework is all plastic, all circuits serving the location are required to have supplementary bonding between them , whether of class 1 or class 11 construction if no rcd is present to the circuits serving the location.
See gn7 and gn8 for examples of such a set up

Nigel · Nov 23, 2018

Ian1981 said:
Even if the pipework is all plastic, all circuits serving the location are required to have supplementary bonding between them , whether of class 1 or class 11 construction if no rcd is present to the circuits serving the location.
See gn7 and gn8 for examples of such a set up

701.415.2 clearly states only ‘extreneous-conductive parts’ and ‘metallic pipes’ are to be supplymentary bonded.

Pete999 · Nov 23, 2018

Ian1981 said:
Even if the pipework is all plastic, all circuits serving the location are required to have supplementary bonding between them , whether of class 1 or class 11 construction if no rcd is present to the circuits serving the location.
See gn7 and gn8 for examples of such a set up

From an interest point of view Ian do you have a Regulation number to clarify this statement? I don't have any GNs.