Gas Bonding

TheCyclingProgrammer

southcoastrgi wrote: »

:T:T

Here we go again but at least it's not me this time :cool:

Any self-respecting electrician would never use an inaccurate term like "earth bonding".

https://www.google.co.uk/search?q=earth+bonding+site:www.theiet.org&client=safari&rls=en&sa=X&ved=0ahUKEwiotI6p0_jQAhWBC8AKHep6CFYQrQIIRygEMAU&biw=1489&bih=905

malc_b

I would agree that having protective bonding visible but is that actually a requirement? Strictly speaking the bonding should be as the gas pipe comes into the building which is not the meter box as that is outside, especially if it one of those sunk in the ground types. And with PME bringing the "earth" outside can be iffy since "earth" might be a different voltage to the soil.

southcoastrgi

Gas regs req the bonding to be before any tees & within 600mm of the meter electrical regs will give a different figure

baldelectrician

DavidFx wrote: »

I stand by what I say.

If you have multiple paths to ground, then under fault conditions you could have different potentials on internal 'grounded' exposed metalwork depending on which 'ground' they are connected to. By bonding them, then all paths to ground have the same potential (equi-potential). A plastic service pipe cannot carry current and therefore cannot introduce a potential.

Bonding internal pipework is suplementary bonding not main bonding

It's quite simple- main protective bonding is required (despite your opinion).


Can you point to any part of BS7671 (IET wiring regs) where it says a gas main bond can be omitted?


If so I will accept your esteemed wisdom

Gloomendoom

southcoastrgi wrote: »

Gas regs req the bonding to be before any tees & within 600mm of the meter electrical regs will give a different figure

A bit difficult with our setup as the meter is outside on the other side of the drive.

DavidFx

baldelectrician wrote: »

It's quite simple- main protective bonding is required (despite your opinion).


Can you point to any part of BS7671 (IET wiring regs) where it says a gas main bond can be omitted?


If so I will accept your esteemed wisdom

Your post on the IET forums gives you the answer

http://www.theiet.org/forums/forum/messageview.cfm?forumid=1&catid=205&threadid=84489

Risteard

DavidFx wrote: »

Bonding internal pipework is suplementary bonding not main bonding

Not true. It could be either. However only extraneous conductive parts need to be bonded.