Plastic fitting between two pipes and electrical safety connections | on ElectriciansForums

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Hi again,

So last night was very eventful! The fitting that sits between two pipes failed and leaked water all in the kitchen. Luckily my father was awake at the time and spotted this before any serious incident took place.

We called a plumber the next morning to get the problem fixed (was still under warranty so no charge yay!), but when I looked at the pipes I noticed something odd....

To my knowledge, any extraneous pipe must be earthed which is why you typically connect at the water inlet to the house and the gas. I also remember reading that if you have two pipes that are insulated with a plastic fitting the you need to have an electrical connection between these two pipes because the tap would otherwise be floating (not connected to anything).

I asked the plumber about this and he said that it's old practice to do just that but I am convinced that there should be an electrical safety jumper across those two pipes!

Am I wrong or is he?

All the best guys!
 
really you need to test the copper pipe after the plastic, to see if it's extraneous. IR test from suspect pipework to MET. if it's >22kΩ, then it's not considered to be extraneous.
 
I also remember reading that if you have two pipes that are insulated with a plastic fitting the you need to have an electrical connection between these two pipes because the tap would otherwise be floating (not connected to anything)..............
but I am convinced that there should be an electrical safety jumper across those two pipes!

If that were true, I would of got shares in an earth clamp business years ago, and made a fortune.
 
So if I understand it correctly...

Earth bonding like that is only required if the exposed metal is something that can A) become in contact with a person and B) potentially become live via a fault in wiring near by.

Many thanks!
 
Not quite exactly. Main protective bonding should be in place, i.e. is the pipe entering the property extraneous. Secondly elsewhere in the property, for example a bathroom, is the pipework entering the room extraneous. As Telectrix said, you would need to test to tell.
 

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