Live Polarity test

[JackTheCat]

Gents
Got a question here asking me how i would test polarity with the system energised, dead test is ohmmeter what answer are they looking for here?

 

[JackTheCat]

found the answer from scaddans book.

"When the supply is connected, it is important to check that the incoming supply is correct. This is done using an approved voltage indicator at the intake position or close to it"

yeh right

 

[plugwash]

check voltage between live and earth.

 

[gingervit]

found the answer from scaddans book.

"When the supply is connected, it is important to check that the incoming supply is correct. This is done using an approved voltage indicator at the intake position or close to it"

yeh right

And yeh, it does happen. There is a 50 50 chance in any domestic dwelling that the meter tails are the wrong way round, if it is a TNS system, it should always be checked. The REC does not!

BTW, Approved voltage indicator means FUSED test leads to relecent guidence note, ie 2mm exposed tips.etc.
Bit of a rant I know, but cost me a good multimeter when mate @borrowed it@ and stuck it accross the mains on continuity.......BANG

 

[Pensdown]

If you follow the link and down load the PDF file you might find the contents useful. Most testers are the same so don't be put off

http://edmundson-electrical.voltili...SSU&universe=infopro.whatsnew.brand&cmid=3153