Electrical Myth busting!

[pencilpusher]

First of all, Happy New Year to everyone...................

Now, having had a thread attract a scaremongerer this week about the "myth" of extending a PME suppy to an outbuilding, I am very interested to hear about electrical myths others have heard of and would like to share. (This is a serious thread to collate myths about electrical can and cannot do's - no other myths are welcome!) Maybe we could compile a list of the top ten electrical myths at the end.

I will start then - You cannot export (extend) a TNCS supply to an outbuilding ..........or else!

Over to you.......................

 

[Marvo]

>20MΩ is an insulation fault that's worth tracking down and fixing to stop the RCD tripping.

 

[mackers]

a little bit of knowlegde can never be dangerous!

 

[GLENNSPARK]

Continuity is good....IR is good....but its tinned stranded..."i`m afraid it will need a rewire love"......

 

[Sintra]

A well designed TT system has a Ra of between 100 & 200 ohms.

 

[Plonker 3]

More DIYers should come on this forum to get advice on replacing a light fittings so we don't have to go round and sort it out when it doesn't work properly anymore.

 

[mechelec]

you are not a proper electrician if you are not in a part P scheme !!!! grrrrrr

 

[Goody]

DIY'ers keep electricians going.

 

[RexT]

Hi Guys,

How about ...It is always so easyfor lighting, just remember black to black and red to red.

Best wishes

Rex

 

[Deleted member 9648]

UK TT systems @ 100-200 ohms result in people dropping like flies all over the place,you hear of terrible accidents every day.

 

[Engineer54]

And the Fools relying on an RCD when they when they leave a UK TT system with an Ra of 200 ohms!!!

 

[GLENNSPARK]

VIR is always shot along its full length......

 

[Deleted member 9648]

People who believe an Ra of 10-20 ohms will mean they no longer rely on an RCD to meet disconnection times.

 

[Engineer54]

People who believe an Ra of 10-20 ohms will mean they no longer rely on an RCD to meet disconnection times.

Then best stick to leaving your customs with your beloved 200 ohms then, ...and fingers crossed it don't go belly -up. ...10 ohms wont meet set disconnection times, but in all likelhood will trip a protection device eventually, especially when helped along with parallel bonding arrangements. Better than s*d all in my book!! lol!!

 

[Engineer54]

People that are hell bent on trying to defend the undefendable, because it's written in the holy bible of BS7671!! ...lol!!

 

[leonard]

You are not a electrician if you don't have NVQ3 or JIB GOLD card