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How to Wire a Plug?!
fat_jedi
Posts: 167 Forumite
I've bought an electrical appliance that had a strange plug on the end. The chap told me that I just have to cut it off and wire a regular UK plug on it as it had been used in a work environment (although he said it was single phase and not 3 phase).
However, when I have cut the flex it has 4 colours and not the expected 3.
It has Brown, Blue, Green/yellow, and black.
What would I do with the black wire?
Should I be calling a sparkie out to do this? If so what would be a good price?
The item is a pump.
Any help gratefully received...
FJ
However, when I have cut the flex it has 4 colours and not the expected 3.
It has Brown, Blue, Green/yellow, and black.
What would I do with the black wire?
Should I be calling a sparkie out to do this? If so what would be a good price?
The item is a pump.
Any help gratefully received...
FJ
"If you think things can't get worse it's probably only because you lack sufficient imagination."
0
Comments
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What sort of pump, what is on the rating plate, and what sort of plug did it have?
Under new harmonised colour codes
Brown, = phase 1 / live
Blue = neutral
Green/yellow = earth
black = phase 2 / live
Which does not make sense for single-phase domestic use.A kind word lasts a minute, a skelped erse is sair for a day.0 -
It sounds like it does need a 400v 3 phase supply to run this pump. Take it back (unless you have a 3 phase supply in your home).0
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There should be a small plate somewhere on the housing which will give you the required information.
Single/three phase
voltage
wattage
etc0 -
what color is the plug?
as a guide,
yellow plug is 110v
blue plug is 240v
red plug is 415vGet some gorm.0 -
Owain_Moneysaver wrote: »What sort of pump, what is on the rating plate, and what sort of plug did it have?
Under new harmonised colour codes
Brown, = phase 1 / live
Blue = neutral
Green/yellow = earth
black = phase 2 / live
Which does not make sense for single-phase domestic use.
Except that if the motor was 3 phase the wires would be brown, black, grey, blue and green/yellow for earth.For every complex problem there is an answer that is clear, simple and wrong.0 -
Except it didn't come with a UK plug top and so god knows where it is from and the regulations/standards, if any, that it complies to.0
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Could be 220V "split-phase", dervied from 110V but -110,neutral,+110 from a centre neutral tapped 110V tranny found in industrial apps. That would account for 2 apparent "line" conductors. What make/model? There must be some rating info on it somewhere.
If it is then it might be modified to be used on single phase by wiring "live" to one line conductor and "neutral" to the other, giving a 220V pd across the device. However if it's a pump it will have a motor - do we know how it's wound? Permanent magnet field coils or not?
More to this than changing a plug!0 -
Outside chance it could be a 2 speed 240v pump as fitted to some boilers?0
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