tails and main bonding on rewire

[MTI]

Hi all, been sifting through the posts but just wanted someone to clarify what is acceptable in my circumstances.

Full rewire done but property has concrete floors in places. A 10mm Earth exists to gas and water but was broken at the gas earthing clamp. Im aware of an unbroken loop been acceptable but due to costs and client not wanting to pay for this again after explaining the break in cable at gas and concrete floors plus extra decor damage, can i somehow pass this with existing?

My only option i see if not, is i can get to the gas under floor as its wood at this part and run a new 10mm to gas and crimp the existing to make a 'solid' cable to water? Defeats the object really! All circuits on 30ma rcd. Doubt 'as far as practicable' comes in here!

Main earthing block and tails blocks existed when i arrived on site. I have run 25mm P+N into blocks and a 16mm E instead of having to break seals on meter but meter has 16mm tails in and out to blocks. Can i pass this?

Although main gas and water are bonded as mentioned above, some rough energy company have installed a boiler and ran a 10mm E on the exterior of the property at 12 inch from floor with no mechanical protection. I know its not acceptable and is maybe just in their company policy to do this. They have also cross bonded at boiler which is fair enough. Im wondering if they had bad results with discon times or something on old wiring or just wanted to charge more! All pipework is continuous copper.

should i just strip out the 10mm to boiler? what about its existing cross bonding?

i could of used this 10mm and pulled it back a bit to the water stop cock which happens to be next to boiler but it has no mechanical protection


Im wanting to use this installation as my exam piece for part p and im dreading anyhting being pulled!


cheers guys!

 

[londonlec]

I beleive the regs dont say the bond should be continuous. You can crimp the two legs together at the gas, then strip the insulation 6" along and rebond it, without replacing the cable.

The 10mm bond ran externally is acceptable, although unsightly, and unnecessary.

 

[Octopus]

I beleive the regs dont say the bond should be continuous. You can crimp the two legs together at the gas, then strip the insulation 6" along and rebond it, without replacing the cable.

The 10mm bond ran externally is acceptable, although unsightly, and unnecessary.

I think that the regs say that "shared" bonding MUST be continuous. Sorry can't remember the reg number.

With respect to the tails, from what you say the tails from the meter to the Henley block are 16mm and you've upgraded the tails from the Henley block the cu to 25mm - this is the appropriate thing to do as you'll be in tyrouble if you break the meter seals. I'm guessing that the fuse was 100A.

 

[malcolmsanford]

Murdoch there is no reg that tells us that the bonding conductor must be continuous, the GN 8 advises that it should be and it's a good guide, but there is nothing wrong with what londonlec proposed.

 

[Octopus]

Thanks Malcolm, I've always worked on the "continuous" theme so at the very least I've been at the "better" end of the guidance.

Every day is a learning day.

 

[ezzzekiel]

Through crimping is a permanent connection so cant see a problem however as its a full rewire this really should of been corrected properley at the begining