Max water bond resistance

[Ampo]

Hi all so I have a situation where a client is moving and they want the db changed for selling. Db change is easy enough as is running a bond to gas which is currently missing. The only issue is that the last eicr said that the water wasn't bonded. It would involve major works (tiled floors and newly decorated walls, coving and so on) and the mains water is opposite side of the house. Although the strap isn't visible I have run a wander lead and got 0.29 on a 6mm at the dB to the stop cock so it is bonded. I know its not a good reading but wonder what peoples opinions are in changing the board? There is no way they want the work done if it involves ripping the house apart for the water bond but they are more than happy to do the board and gas.

 

[Pretty Mouth]

Hi all so I have a situation where a client is moving and they want the db changed for selling. Db change is easy enough as is running a bond to gas which is currently missing. The only issue is that the last eicr said that the water wasn't bonded. It would involve major works (tiled floors and newly decorated walls, coving and so on) and the mains water is opposite side of the house. Although the strap isn't visible I have run a wander lead and got 0.29 on a 6mm at the dB to the stop cock so it is bonded. I know its not a good reading but wonder what peoples opinions are in changing the board? There is no way they want the work done if it involves ripping the house apart for the water bond but they are more than happy to do the board and gas.

.29 ohms = 94m of 6mm cable, or more likely a loose connection. Could you not run the bond around the exterior of the building?

 

[suffolkspark]

You sure it needs doing at all?

 

[davesparks]

could you elaborate on how you tested this please? was this tested with the 6mm disconnected from the MET?

 

[telectrix]

is there a gas pipe anywhere near the water stop cock, or could the water bond be connected elsewhere ( as in as close as practicable to the incomer without demolition)?

another solution would be to get a wet-pants to fit a plastic section close to the stop cock

 

[Ampo]

.29 ohms = 94m of 6mm cable, or more likely a loose connection. Could you not run the bond around the exterior of the building?

I know its really high and realistically only a 20m run, its a terrace with board at the front and stop cock at the back, gas meter i van do externally but no chance on water
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could you elaborate on how you tested this please? was this tested with the 6mm disconnected from the MET?

Yes so I did a lknd lead test with some 1mm singles from the db position with the 6mm disconnected to the stop cock. Singles were nulled out

 

[Baddegg]

I know its really high and realistically only a 20m run, its a terrace with board at the front and stop cock at the back, gas meter i van do externally but no chance on water
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Yes so I did a lknd lead test with some 1mm singles from the db position with the 6mm disconnected to the stop cock. Singles were nulled out

As tel said get a plumber to put a section of plastic in at the point of entry of the pipe

 

[Ampo]

is there a gas pipe anywhere near the water stop cock, or could the water bond be connected elsewhere ( as in as close as practicable to the incomer without demolition)?

another solution would be to get a wet-pants to fit a plastic section close to the stop cock

Unfortunately nothing anywhere near where I could get to. The board is at the front door

 

[pc1966]

If bonding is utterly impractical, then what about fitting a 100mA delay RCD incomer instead of the main switch and converting it to a TT system? You would need an earth rod, but that might be more practical then ripping up expensive floors.

Just another idea to be discussed!

 

[suffolkspark]

I find it odd that the incoming water supply isnt plastic..... only come accross half dozen lead ones in 17 years