[craigp]

im trying to fit a new vac motor only the new one which although being the same one is a different brand, it only has 2 wires, were the original had 3 which joined using a little 3 pin plug, presumabley earth, nuterial and positive,  )

if the new one only needs 2 wires what 2 are they,? earth and positive? they are both black so cant tell apart?

the 3 in machine with the little plug are yellow/green (i know thats earth) brown and blue

help appreciated, craig.

[Ian Gourlay]

Craig,

Not an Electrition but I had this problem.

I was told they are self earthing when I phoned supplier.


However check with  your Supplier.


The problem will arise when you want install one that has an earth wire.

If you cant remember what you did.

[steve cardy]

Hi craig, on your old vac are the two wires black?

[steve cardy]

Sorry craig, i hadnt read your post properly.The earth wire has to be taken off your old vac and put on your new vac.Ive just changed a moter in my machine the new vac having two black wires i was told at prochem that they would join either of the other two wires .I did this and it was fine.
     steve.

[craigp]

no, old vac had 3 wires green/yellow, black & a white,

new ones got 2 (black),  i think what you say ian makes sense i thought it might be self earthing because one wire comes out and back into the vac motor,  

i guess i just dont connect to earth then, i have a feeling the 2 on the new one can go to either, think i might try that and stand back! lol

[craigp]

i posted that before reading yours steve, that confirms it then.

2 black wires either, but there is no were to connect a earth?

which if like ian says its self earthing, thatll be right?

[steve cardy]

on my vac the earth wire is held by a screwinto the metal body of the vac.where does your earth wire connect on your old vac?

[Vernon Purcell]

They are called double insulated and need no earth.
Who did you buy it from
Vernon

[craigp]

woodbridge, just conected as said working fine

[craigp]

thanks for your help chaps, its seems ok, ill give it a proper test tommorrow before taking it on a job

[PaulKing]

 

Never heard of self earthing, but a double double insulated would only have two wire coming from it does'nt matter which way round they go either live or neutral as AC is Alternating current 

Vac may be double insulated but try and get a earth on  to it somewhere ( that is presuming the vac  has a metal body) as if you suck up water it may just try and earth through you and your wand, Then you get hair like mine!

[Kinver_Clean]

If the motor has any exposed metal parts( and I have never come across one that didn't) then it must be earthed. The earth wire off the old motor will have been fixed with a screw somewhere. As long as tgere is a proper connection for the eatrh it seems that it does not matter where. A secure fixing on a motor mount would probably be sufficient if the fan bits are metal.
If both other wires are black then it makes no difference which way they are connected, the motor will still run the right way.
Your machine should be PAT tested after fitting new bits to ensure safety.

Trevor

[Ian Gourlay]

Just had a look at the spare Woodbridge There are exposed Metal Parts.

So will do as Trevor says.

If i make it to Carpex I will have a word with Woodbridge.


When I said self earthing its my simple term as I thought that was the definition I had when I quiried no place for earth wire with Woodbridge.

But obviously Vernon who sells motors and calls them Double Insulated has the correct term.

[craigp]

well ive been using it all working ok, there was no were for earth? no connectors or screw, the body of the motor was not like i seen before its black and i think it was plastic?  could be wrong

anyway its much quietier than the old ones

a new generation of motor?

[PaulKing]

Craig it will be fine up untill it (may possibly) develope a fault and the current look for a easy path to earth

Hence the earth wire to give it a easy path and not a hard one like the poor sap on the end of the wand.

[Mike Halliday]

the opposite, those are the light duty motors, that's why its quieter, 1000w as opposed to the 1300w H/D ( I think)

Mike

[Ian Gourlay]

The spare in the hall says 1300w

Does it make it HD

[Mike Halliday]

is it all metal or is the armiture cover a black plastic?

[Mike Halliday]

sorry got it wrong :

the air outlet should be metal on the H/D

serial No 117123-13

the armiture cover is black plastic on both

Mike

[gwrightson]

i havnt put my earth wire to any thing   am i in danger? 
 geoff