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Ask The Trades › DIY Forum › Electrical Questions › Reversed live and neutral

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Reversed live and neutral (Read 24023 times)

bripl GDPR opt-out	Re: Reversed live and neutral Reply #34 - Jan 12^th, 2005, 7:35pm as a humble plumber ithink i should point out most modern boilers which contain a pcb will not operate with reverse polarity something to do with the ignition and flame sensing device.
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Lectrician Administrator Trade Member Author Offline Ask The Trades Posts: 8814 Total Thanks: 109 For This Post: 0 Braunton, North Devon United Kingdom Gender: Trade: Electrician	Re: Reversed live and neutral Reply #35 - Jan 12^th, 2005, 8:06pm Well there we have it guys... My plumber was still a tosser!
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billythekid Trade Member Offline I love YaBB 1G - SP1! Posts: 3402 Total Thanks: 0 For This Post: 0 Trade: Plumber	Re: Reversed live and neutral Reply #36 - Jan 12^th, 2005, 10:03pm i agree, most plumbers are!
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scotspark

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Re: Reversed live and neutral
Reply #37 - Jan 13^th, 2005, 8:08pm

Had exactly this problem when In a rush fitting a new consumer unit in a horrifically akward space I connected the tails up reverse polarity Embarrassed

and didn't test until the next day cos i had to rush off and my martindale had got broken the previous day.

got there and the customer mentioned thety had no hot water or central heating Embarrassed

not one of my finer moments.

why do you think he done it deliberately DAMOCLES?????? it's asimple mistake to make as different sockets have connections on different sides, but he should have picked it up when testing

brown to red and blue to f****&&&&ommited!!!!!!!!!!!!!!!!!!!!!!!!!!!

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ban-all-sheds

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Re: Reversed live and neutral
Reply #38 - Jan 17^th, 2005, 12:43am

[quote author=bripl link=1105391377/30#34 date=1105558514]as a humble plumber ithink i should point out most modern boilers which contain a pcb will not operate with reverse polarity something to do with the ignition and flame sensing device. Roll Eyes

[/quote]
It's an AC supply, the voltage between Live and Neutral will vary between +325V and -325V 50 times a second whichever way round it's connected - how can it make a difference?

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plugwash Administrator Offline I love YaBB 1G - SP1! Posts: 1383 Total Thanks: 0 For This Post: 0 Trade: Not Specified	Re: Reversed live and neutral Reply #39 - Jan 17^th, 2005, 8:47am all i can think of is it could be relying on thier being a voltage between neutral and earth possiblly for some sensing arangement. or its a deliberate miswiring cutout for some reason.
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