installing main earth bonding conductors to gas and water services

When my gas meter was changed a few years ago, they mounted the new one in a metal bracket that clamps the in- and out- bound ports together:
If you're implying that that bracket results in electrical continuity across the meter (which it probably does), in electrical terms that's probably theoretically a bad thing - it would arguably be better if the inlet and outlet pipes of the meter were electrically insulated from one another.

Kind Regards, John
 
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I learnt at college in the 80s that if you are running from one pipe to another (eg gas to water) then best practice is to make an unbroken loop around the screw so that if the connection loosens, you don't lose the connection to the pipe at the end of the cable.
Dont think it was best practice, but an actual regulation to do it that way
 
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Just had a look at my copy of the 15th Edition and I can't find anything.
Would have been the 14th if anything, sure we were taught that at college, i dont think it was a myth.
Uncut you could bond several pipes, alternatively each pipe had to be seperate cables
 
Would have been the 14th if anything, sure we were taught that at college, i dont think it was a myth. Uncut you could bond several pipes, alternatively each pipe had to be separate cables
Even today, there are some views/guidance's to that effect so, even if you were taught that at college, it doesn't necessarily mean that it was a requirements of regulations at the time.

If one extended this thinking to 'protective conductors' in general, then every 'point' in a circuit (socket, switch, FCU, light. hard-wired load etc.) would have to have its own separate CPC run back to the MET.

Kind Regards, John
 
Even today, there are some views/guidance's to that effect so, even if you were taught that at college, it doesn't necessarily mean that it was a requirements of regulations at the time.

If one extended this thinking to 'protective conductors' in general, then every 'point' in a circuit (socket, switch, FCU, light. hard-wired load etc.) would have to have its own separate CPC run back to the MET.

Kind Regards, John
I think the reasoning was that if other trades removed the meter or whatever the next bond was always maintained
 
I think the reasoning was that if other trades removed the meter or whatever the next bond was always maintained
Yes, that makes good sense. However, as said, I'm not by any means certain that it was ever an actual regulation.

Kind Regards, John
 
Just to clarify my question:
PHOTO2.jpg


Am I to assume correctly that the new 10mm2 water and gas need to terminate in the distribution board terminal block? Or should they terminate in the CU.
I'm assuming it's the terminal block as per photo?
Do the cables need to be labelled individually as to which they are?
 
The large conductor split between two terminals, where is the other end of that connected?
 
Is that overhead TN-S?

Staffordshire was the first place I ever saw overhead TN-S and on the same day, subterranean TT supplies.

When you learn about supply types at college, you are generally told TN are underground and TT overhead. Then you go out into the world and find all sorts of variations!
 
Is that overhead TN-S?

Staffordshire was the first place I ever saw overhead TN-S and on the same day, subterranean TT supplies.

When you learn about supply types at college, you are generally told TN are underground and TT overhead. Then you go out into the world and find all sorts of variations!

It's a flat so I'm assuming it's TN-S? The cables likely sprawl all over the building? No overhead lines around here
 

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