Another bonding question

[Tim]

Hi guys,

Doing an eicr on a flat. Water is in plastic up to the boiler and no gas to the property. No bonding in place at the moment. Tncs system.

Ir test to the met and get dead short, continuity .07ohms however when i disconnect the 2 earths (from 2 spurs) to the immersion heater i get a reading of 1.9Mohms (over 23kohms) and >999 on continuity.

Does this require bonding?

in the spirit of the forum my interpritation is no as the water pipes do not meet the requirments of an extranious conductive part.

I just want clarification of my interpritation, every days a school day so im happy to be told im wrong.

Cheers,
Tim

 

[telectrix]

what is the water pipe to taps etc.? it that's in copper from stop cock, then it requires bonding.

 

[Tim]

what is the water pipe to taps etc.? it that's in copper from stop cock, then it requires bonding.

Thanks for the reply,

Stop cock to immersion heater is copper (its in the same cupboard)

Stop cock to kitchen taps is copper with plastic joiners (stop cock is in the kitchen)

ensuite is plastic with metal flexy hose

bathroom is plastic with metal flexy hose

This install is only 4ish years old and was tested less than a year ago (change of occupancy so im re testing).
The flats have been installed to a good standard and everything looks very proffesional, which makes me doubt that bonding is required as given the standared of everything else, the installer or the last tester should have picked it up.

Cheers,
Tim


Should have stated above, all circuits have a 30ma rcd.

 

[Engineer54]

Hi guys,

Doing an eicr on a flat. Water is in plastic up to the boiler and no gas to the property. No bonding in place at the moment. Tncs system.

Ir test to the met and get dead short, continuity .07ohms however when i disconnect the 2 earths (from 2 spurs) to the immersion heater i get a reading of 1.9Mohms (over 23kohms) and >999 on continuity.

Does this require bonding?

in the spirit of the forum my interpritation is no as the water pipes do not meet the requirments of an extranious conductive part.

I just want clarification of my interpritation, every days a school day so im happy to be told im wrong.

Cheers,
Tim

So what fuel supplies the boiler?? Is it an oil fired boiler, ...if so, does the oil come into the property via a metal pipe to the boiler? Did you disconnect the boilers supply CPC also?? A little more clarification required here i think!!

 

[telectrix]

from what you say, there is copper from stop cock which is extraneous, and so will require bonding after the stop cock, unless the incoming water pipe is plastic. any copper after plastic will not.

 

[Tim]

Sorry i should have been clearer in my OP.

Incoming water is plastic, its partly copper after the stop cock.

Its an electric immersion heater so gas or oil.

The metalic water pipes do not leave the property.

from what you say, there is copper from stop cock which is extraneous, and so will require bonding after the stop cock, unless the incoming water pipe is plastic. any copper after plastic will not.

You have confirmed what i thought, my only issue was that the earth in the spurs for the immersion heater bonds the pipework to the met, and i was not 100% sure wether this would then mean it required a correctly sized bonding cable.

Thanks for the reasurance

Tim

 

[Tim]

So what fuel supplies the boiler?? Is it an oil fired boiler, ...if so, does the oil come into the property via a metal pipe to the boiler? Did you disconnect the boilers supply CPC also?? A little more clarification required here i think!!

Sorry, should have been clearer in the op, its an immersion heater not a boiler.

Tim

 

[Engineer54]

............ A blond moment!! lol!!

 

[Tim]

............ A blond moment!! lol!!

Certanly was, im having a few of them today, i just coded an rcd because the 48ms didnt meet the <40ms requirements for 1x at 30ma. Then i relised thats 5x.

Im going for lunch and a red bull to get me back on form.

Cheers,
Tim

 

[telectrix]

red bull? sounds like a JD would be more appropriate. LOL.

 

[Tim]

red bull? sounds like a JD would be more appropriate. LOL.

Dont tempt me, theres a pub over the road lol

 

[Richard Burns]

Just to say that you checked if the pipe was extraneous and it wasn't, so it did not need bonding; however it could become live under fault conditions as it was connected by the assembly to the circuit earthing so it needed to be earthed (which it was), sorted.

 

[Amp David]

Have you IR tested between the incomming service and the earth conductor alone?

 

[GLENNSPARK]

Hi guys,

Doing an eicr on a flat. Water is in plastic up to the boiler and no gas to the property. No bonding in place at the moment. Tncs system.

Ir test to the met and get dead short, continuity .07ohms however when i disconnect the 2 earths (from 2 spurs) to the immersion heater i get a reading of 1.9Mohms (over 23kohms) and >999 on continuity.

Does this require bonding?

in the spirit of the forum my interpritation is no as the water pipes do not meet the requirments of an extranious conductive part.

I just want clarification of my interpritation, every days a school day so im happy to be told im wrong.

Cheers,
Tim

should be copper n all at least a meter to the boiler....if it isn`t then auld wet arse hasn`t done his job properly....