10mm Main Bonding question

[freedomrun]

Domestic TN-C-S. 10mm Main Bonding required for Water and Gas as none present. Would it be within the regs to use one length of bonding to connect both services. I would like to run one 10mm copper length from the Gas to the Water and then to the CU. Would it be best to use a complete unbroken length or otherwise use Crimp lugs to fix to the clamps? I'm looking at doing this to keep the costs down a bit, what with the price of copper and the distance these services are from the CU in the property, otherwise i would use two seperate runs of 10mm as per OSG diagram. Cheers.

 

[Theorysparky]

Domestic TN-C-S. 10mm Main Bonding required for Water and Gas as none present. Would it be within the regs to use one length of bonding to connect both services. I would like to run one 10mm copper length from the Gas to the Water and then to the CU. Would it be best to use a complete unbroken length or otherwise use Crimp lugs to fix to the clamps? I'm looking at doing this to keep the costs down a bit, what with the price of copper and the distance these services are from the CU in the property, otherwise i would use two seperate runs of 10mm as per OSG diagram. Cheers.

yep this is ok

one unbroken run to all points

 

[Cirrus]

Absolutely fine as long as the run of earth cable is continuous. I did this exact same thing yesterday.

 

[Doc Hudson]

The general concept is that providing undoing the clamp at one extraneous part, will not disconnect the continuity of the bond to the other extraneous part, then it is acceptable to use one continuous cable. Obviously you would label the bonding conductor as combined Gas & Water at the CU end.

Doc H.

 

[NozSpark]

Sounds ok, but if your services are a "bit far away" then you may need to increase the size of the bonding conductor. You should be looking at keeping it's resistance <0.05ohms which IIRC allows up to about 30m with a 10mm earth

 

[kerching]

Here's an idea for the manufacturers of e clamps....why not make one that you can wrap the 10mm or 16mm cable around the screw without having to take the screw out and dropping it...just a thought!..............yes it did happen yesterday, last clamp, miles from home, everywhere shut....................... :coat

 

[NozSpark]

Dunno mate,, I always ring lug them!

 

[steptoe]

ring lug?

whats that?

like a normal lug but for a through cable?

 

[freedomrun]

The overall distance is less than 30M, so sould be ok then with one unbroken legnth to both services - and i will label as used for both at the CU and on the EIC.