Bonding to pipes

[james king]

Hello,

just a quicky. We have not done domestic in some time now.

We carried out a pir.

We found that the gas is bonded but the all other supplementary bonding is not in place.

now if there is a rcd coving the installation does the pipes ect need to be bonded?

As it is, there is no rcd so would I then give this as a option to bond the pipes/boiler or just install a rcd?


Thanks

 

[telectrix]

nothing to do with whether RCD is fitted or not. if water comes in on metal pipework it needs bonding. code C2 if not. code C2 for no supplementary bonding in bathrooms if no RCD fitted.

 

[james king]

No I understand if water comes in or gas ect I needs bonding. Gas and water has been earthed

I am talking about if supplementary bonding is required when there is no rcd? And if I install a rcd then they wouldn't be a requirement to install bonding to boiler bathroom ect?

 

[marcusone]

Water supply will need bonding if metal service into property. Code 2 if it isn't. No supplementary bonding also Code 2. Covering bathroom circuits with an RCD is an option as long as all criteria are met.

 

[Dizzy_Maskell]

Just a point mate it is now called EICR not PIR as you called it maybe a refresher course would be a good option if you are carrying out this type of work as the defect codes have no changed too

 

[marcusone]

No I understand if water comes in or gas ect I needs bonding. Gas and water has been earthed

I am talking about if supplementary bonding is required when there is no rcd? And if I install a rcd then they wouldn't be a requirement to install bonding to boiler bathroom ect?

Yes. Supp Bonding is required when there isn't an RCD.
Yes if you cover all bathroom circuits with RCD protection and meet the necessary criteria to do so. You can omit supplementary bonding.

 

[Geoffsd]

Is supplementary bonding perhaps NOT required in the bathroom?

Have you taken any measurements?

You cannot say yes or no by looking at it, let alone from a forum.

 

[Guitarist]

Sorry to sound harsh, but why are you carrying out EICR's when your knowledge seems sketchy at best?

 

[Farmelectrics]

If you have earthed gas and water and you board is dual rcd ie 17 th edition board I didn't think you needed to cross bond pipes

 

[D Skelton]

Supplementary bonding would only be required between simultaneously accessible extraneous and/or exposed conductive parts in the bathroom. Have you tested for these?

If there are indeed simultaneously accessible extraneous and/or exposed conductive parts in the bathroom then supplementary bonding is required between each in every circumstance unless all these three requirements are met:

1. The requirementsfor ADShave been met,2. All extraneous conductive parts are effectively connected to earth,3. An RCD with a rating not exceeding 30mA is provided for additional protection on all circuits within the bathroom.

Guess what... This doesn't mean that just whacking an RCD on will absolve the installer of any responsibility to abide by the requirements for supplementary bonding (as most 'electricians' these days like to think! [I understand that you are in this case the inspector and not the installer]).

If there are no simultaneously accessible extraneous and/or exposed conductive parts in the bathroom and no supplementary bonding then that warrants no code, if there are however and yet there is still no supplementary bonding then that is a C2. Whether or not adding an RCD to cover those circuits will mean that the requirements for supplementary bonding don't have to be met will be entirely dependant on your findings for the aforementioned points '1' and '2'.
This is basic and fundamental knowledge written in black and white thoughout BS 7671, in particular sections 415, 544 and 701, that anyone carrying out EICRs should have! The very fact that you are having to ask these questions causes me to doubt your level of competence to carry out what you are doing.

 

[Geoffsd]

Supplementary bonding would only be required between simultaneously accessible extraneous and/or exposed conductive parts in the bathroom. Have you tested for these?

If there are indeed simultaneously accessible extraneous and/or exposed conductive parts in the bathroom then supplementary bonding is required between each in every circumstance unless all these three requirements are met:

1. The requirements for ADS have been met,2. All extraneous conductive parts are effectively connected to earth,3. An RCD with a rating not exceeding 30mA is provided for additional protection on all circuits within the bathroom.

All true.

However, there is also the fact that the installation may be such that the resistances between the parts may be sufficiently low that the requirements for bonding are met by the parts and cpcs themselves.

Depending on the situation, the required resistances can be relatively high.

In the OP's case there may be supplementary bonding outside the bathroom which has not been seen or the pipe work may not be extraneous.



Testing is the only way to find out - not asking "Do these pipes need boding?"

 

[D Skelton]

Refer back to my previous post and point 2 Geoff

 

[Flanders]

Although we see a lot of boiler and sinks in kitchens cross bonded, this is now not required(this i think was a 15 addition reg ) Supplementary bonding is required in a room containing a bath or a shower but if an the circuits within the bathroom are RCD protected then no Supplementary bonding is required

 

[D Skelton]

Refer back to me previous post, in partucular points 1,2 and 3 Flanders

Just because the bathroom has an RCD, it doesn't automatically mean it no longer requires supplementary bonding.

 

[Des 56]

This freezing forum caused me to lose my post which was going to refer Flanders to post 10 by D Skelton
He has now been admonished by the Author of that post 10 and rightly so

This forum is also getting spammed again