Using one cable for multiple Earth bonding

[Roogy1]

HI all, I've had 3 x additional gas supplies installed in a building. Can i use one 10mm bonding cable and link these new supplies (keeping the cable continuous by stripping the sheath and clamping into earth straps) or do i have to run 3 new earth cables? Also can i use a staple gun (metal uninsulated staples) to clip this cable to skirting ? Thanks in advance

 

[cliffed]

Yes as long it’s not broken

 

[telectrix]

Yes as long it’s not broken

quite rare for me to buy broken cable.

 

[Roogy1]

Yes as long it’s not broken

Thanks, I forgot to add that these supplies are for 3 individual flats so I’m assuming that won’t make any difference?

 

[telectrix]

Thanks, I forgot to add that these supplies are for 3 individual flats so I’m assuming that won’t make any difference?

that could depend on the flats' earthing arrangements. are they all to a common earth or separate?

 

[Roogy1]

that could depend on the flats' earthing arrangements. are they all to a common earth or separate?

The incoming supply comes into a boiler room at the rear of the property. There is a main earth bonding bar here where current water and gas pipes are bonded. The meters are located here. The electrical supplies to the flats go off in SWA cable via isolators

 

[pc1966]

It should be fine from the incoming supply that spits to the flats, as all flats are then on the same source and earthing arrangement anyway.

Check the bonding size though, as it would be determined in the PME case by the size of the incomer cable, not the size of the flat's feeders (see Table 54.8 in the regs).

For a couple of flats I would doubt the supply is more than 35mm (10mm bond), and very unlikely to be more than 50mm (16mm bond), so going with 16mm bond is probably OK, but check as far as you can as 10mm is cheaper and far easier to wrangle.

As already mentioned, ideally you don't want any joints in the bonding cable but if necessary then you can use something maintenance free like a proper crimp or soldered joint. Getting 16mm wrapped round your typical pipe clamp tag is difficult, you might need to have a longer screw/bolt than normally comes with them.

 

[Lister1987]

quite rare for me to buy cable.

Fixed that for you @telectrix