me9 <
me9@privacy.net> wrote:
Harry Bloomfield Esq <harry.m1byt@outlook.com> wrote:
On 24/12/2024 09:58, Scott wrote:
I think he also said that a plastic gas pipe can be used outdoors but
not indoors.
Gas regulations! Plastic buried underground, is much less likely to be melted by the heat from a fire, and less of an issue, even it it did. A plastic gas pipe subjected to heat in a building, would be much more serious.
My house was built in the 70s, water pipe is plastic. Gas pipe appears as plastic coated steel. I have a substantial earthing system connected from my amateur radio aerials (10mm^2 and at least 10 earth roda and many buried wires). I'd like to convert to a TT system, but if I disconnect my supplied earth and check the earth loop impedence to my system it is about 6 ohms. Is this likely to be the earth bonding to the gas pipe (Unable to disconnect easily due multiple paths through boiler etc) to the earth next door. If so can I get teh gas people to fit an isolating section in the pipe?
I doubt you could get an insulating section of pipe installed before the
meter without splashing the cash at your gas network operator, but could you get a gas fitter to install an insulating piece of pipe straight after your meter? Then your earth bond would go to the pipework system after the insulated piece (before the first tee) and be at the potential of your earth rods rather than any potential current flowing from next door.
(I'm not sure how the DNO/electricians would view conversion to TT - worth asking around. At the very least you'd need RCDs on everything)
Theo
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