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Volt stick lighting up at gas meter


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#1 OFFLINE   oldtimer

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Posted 02 February 2014 - 02:55 PM

Guys was called out last week to a 2nd floor flat British Gas was to have moved the gas meter but refused because the fitter checked the gas meter pipework with a volt stick and it lit up. He added that it could be nothing but he could go no further until it was checked out .

 

Had a look it was a split CU one side RCD and non RCC

Supply was a TNCS (Ze=0.06)

Gas pipe bonded with a 10mm

Water pipe bonded by a 10mm

 

I checked this out and measured for voltage at the meter via a separate earth and nothing and yep volt stick lit up I eventually tracked the problem down to the central heating boiler but went no further as it is under a maintenance contract .

 

So I take it this can be common on a TNCS or PME supply in a flat ? Anybody had this and what checks do you do ie amp probe the gas pipework and any faults that you have found causing this

 


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#2 OFFLINE   Hertz a lot Re: Volt stick lighting up at gas meter

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Posted 02 February 2014 - 04:08 PM

If you have no potential between pipework and earth, then you have no problem. Voltsticks aren't and shouldn't be used for testing as you know. Voltsticks light up for all sorts of reasons, and should be ignored, a calibrated voltmeter is far better. The BG engineer needs some training by the sounds of it, or he should at least leave the electric to someone like yourself who knows what they are doing!

 

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#3 OFFLINE   MDJ Re: Volt stick lighting up at gas meter

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Posted 02 February 2014 - 05:02 PM

Guys was called out last week to a 2nd floor flat British Gas was to have moved the gas meter but refused because the fitter checked the gas meter pipework with a volt stick and it lit up. He added that it could be nothing but he could go no further until it was checked out .

 

Had a look it was a split CU one side RCD and non RCC

Supply was a TNCS (Ze=0.06)

Gas pipe bonded with a 10mm

Water pipe bonded by a 10mm

 

I checked this out and measured for voltage at the meter via a separate earth and nothing and yep volt stick lit up I eventually tracked the problem down to the central heating boiler but went no further as it is under a maintenance contract .

 

So I take it this can be common on a TNCS or PME supply in a flat ? Anybody had this and what checks do you do ie amp probe the gas pipework and any faults that you have found causing this

Oh no, Oh dear, Gasp


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#4 OFFLINE   oldtimer Re: Volt stick lighting up at gas meter

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Posted 02 February 2014 - 05:30 PM

Agreed and call me cynical but why all of a sudden are the meter guys doing this other to say Ahh Haa you have a major problem and I can get my company to look at it for you christ there was a bloody big 10mm earth cable bonded to the pipe.

 

Plus this is the first time I have heard of this so no doubt I can expect more and I want to be prepared.

 

I had a problem last year where a metal sink was "live" and tracked it down to the washing machine socket earth being adrift and the sink being bonded to the washing machine socket earth terminal with plastic supply pipes so once the earth was reconnected problem was solved


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#5 OFFLINE   oldtimer Re: Volt stick lighting up at gas meter

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Posted 02 February 2014 - 05:41 PM

Oh no, Oh dear, Gasp

Care to comment 

 

Is this a new BG wheeze ? the reason I ask is I get called out about 7-10 times a year and its always O my god you have no earth only to find on all of one they do have an earth 


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#6 OFFLINE   MDJ Re: Volt stick lighting up at gas meter

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Posted 02 February 2014 - 06:46 PM

comment about  using a volt stick? I had better not, tony or lenny may ban me. they should be thrown away, appalling items of equipment and only enthusiasts use them ;)



if you do use one then at least use 2 together lol


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#7 ONLINE   Tony Re: Volt stick lighting up at gas meter

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Posted 02 February 2014 - 09:56 PM

I'll not ban you. The bloody things should be in the bin! I'll help any way I can to hurt GB


I’m guilty! Whatever it was, I did it!
I really must start taking my anti-paranoia pills.


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#8 ONLINE   Davethsparky Re: Volt stick lighting up at gas meter

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Posted 02 February 2014 - 10:24 PM

There's nothing wrong with volt- sticks as long as you remember the golden rule-

 

If it lights up red it's probably live and if it doesn't light up its probably live.







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