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Discuss plastic pipe and earth. in the Periodic Inspection Reporting & Certification area at ElectriciansForums.net

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what's the point of having to run in a 10mm cable to the incoming water supply if it's blue elkathene plastic pipe,and the rest of the plumbing in the building is in hepworth plastic.My boss says we have to get the plumber to fit a 6inch piece of copper pipe after his plastic stopcock so as we can fit our earth clamp.Surely the water itself is a poor conductor.?
 
A

Adam W

As per OSG 4.4 (p29):
"There is no requirement to main bond an incoming service where the incoming service pipe and the pipework within the installation are both of plastic".
 

slocm3105

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Arms
Just make sure that there is no metal pipework in the house before taking this into consideration :). Cover yourself.
 

EddieB

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Arms
Then you get the situation where the kitchen fitter has changed the plumbing and the stop cock is still copper then there's 6ft of plastic and then back to copper, where oh where are we supposed to clamp the 10mm earth bonding cable?
 
S

Spudnik

This a very tricky subject and can only be cleared by taking each installation as it comes.

The only way you can be sure if bonding is required or not is to test the resistance between the incoming pipework and a local CPC.
 
S

sles

Then you get the situation where the kitchen fitter has changed the plumbing and the stop cock is still copper then there's 6ft of plastic and then back to copper, where oh where are we supposed to clamp the 10mm earth bonding cable?
....or 6" of copper then a carbuncle of plastic push fits where the kitchen fitter has thrown his proverbial spanner in the works

Steve
 
W

wisesparky

Hi guys, thats what i got told, just to run 10mm to main water in and leave there incase it gets changed at a later date????
Suppose if they pay me for it i dont mind.:D
 
S

skiandy

In the IEE wiring matters mag I'm sure it said that bonding things when the plumbing installation was done in poly pipe actually made it a greater risk. :eek: I'll need to dig out the mag though......
 
S

SEC-Tom

One of the lads at work did this but there wasn't any copper so he bonded to the plastic pipe, very silly of him. The pipe then burst covering him and the house he was rewiring with water.
 
W

WarrenG

If you have plastic push fittings in the copper pipework you should install a bonding conductor across the fitting to maintain the conductivity.

See Pic. :)
 
Last edited by a moderator:
S

sles

If you have plastic push fittings in the copper pipework you should install a bonding conductor across the fitting to maintain the conductivity.

See Pic. :)
Warren,

If it was one or two then I could understand this.

The problem is the kitchen fitters use them like they are going out of fashion.

It is not uncommon to open the cupboard door under the sink and see a dozen of them in a maze of pipework and then there is the stuff you CANNOT see or even possibly get at behind the other cupboards / boxing in / floorboards. When it is like that, there is no real practical reasonable answer.

Steve
 
B

billybob

I'm a kitchen fitter,who uses end feed solder fittings(cheaper).

This situation with the earthing requirements is confusing,so I just earth it all,unless its obviously all plastic.

On a similar theme,how does ptfe tape on gas affect the electrical conductivity?
 

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