Live Earth loop testing on light circuits

[Guest123]

Well I for one will always carry out a Zs test.

Also everyone on this forum is equal and all we do share the knowledge and skills we have without an i'm superior attitude. I have all the qualies that you have listed and more but don't try and ram them down anyones throat.

 

[super spark]

Well I for one will always carry out a Zs test.

Also everyone on this forum is equal and all we do share the knowledge and skills we have without an i'm superior attitude. I have all the qualies that you have listed and more but don't try and ram them down anyones throat.

Im sorry if I came across rude or arrogant, I apologies as this was not my intention. I joined this forum to increase my knowledge and perhaps help others.

I used to always carry out Zs test until it was pointed out to me that the calculation in question is measured and more accurate, but each to there own and all circumstances and people are different. Circumstances may arise where a Zs test is justified and valid.

I hope you would accept my apology, forums work as the age old saying goes; 2 heads are better than 1.

This forum seems like a good one & I'd rather make friends than come across as a ****. sometimes just typing stuff I can get carried away and maybe come across that way.

Once again, My apologies if I offended anyone.

 

[EddieB]

S/S, you didn't offend me I think most of us are dyed in the wool contract sparks who take a bit of offending, thanks for replying to the original thread.
"its good to talk"

 

[Guest123]

No worries.

 

[dynamite2000]

hi pal can you tell me how to do a earth fault loop test on a ring circuit while it is still live please..?

 

[WayneL]

hi pal can you tell me how to do a earth fault loop test on a ring circuit while it is still live please..?

Ha Ha, dynamite, you blow me away!! (pun intended)

 

[m4tty]

Use a kewtech plug adapter or the plug in lead which comes with the tester

 

[IQ Electrical]

hi pal can you tell me how to do a earth fault loop test on a ring circuit while it is still live please..?

I hope it's a wind-up but you know, I'm just not sure!

 

[T&Earth]

Hi

How do you by-pass the RCD, surely if you have to go to the trouble of taking the RCD out, then it would be easyer to do Ze = R1+R2

Many Thanks
Steve

 

[WayneL]

Hi

How do you by-pass the RCD, surely if you have to go to the trouble of taking the RCD out, then it would be easyer to do Ze = R1+R2

Many Thanks
Steve

You could always link out at the light/rose and test Zs at the CU

 

[T&Earth]

Hi Waynel

Thanks for your reply, but sorry to thick but what do you link
Thanks
Steve

 

[WayneL]

Hi Steve,

Safely isolate installation (obviously)

Ensure Main Switch, all MCBs and all RCDs are open (off)

Link out 'Line' and 'CPC' at furtherest point on circuit.

Using two lead 'Loop Tester', place one probe on the outgoing side of the MCB, for circuit you wish to test, and the other probe on the incomming 'Line' conductor at the 'Main Switch'.
Take Zs reading.

Alternatively, if you wish to test through the MCB, but skip the RCD, then close the MCB (of circuit under test), and place your probes on the outgoing 'Line' of the RCD and the incomming 'Line' of the 'Main Switch'
Take Zs reading.

Don't forget to remove the 'Link'

 

[T&Earth]

Hi Waynel

Thanks for the help very useful cheers

Steve

 

[WayneL]

Hi Steve,

Some people cringe when this method is mentioned - and some just can't get their heads around it.

In my opinion, it could be a better option than standing on a set of 'steps' and trying to get your probes onto the terminals in a ceiling rose.
Also helpful if you haven't got a 'no-trip' tester as it won't trip the RCD.

 

[Jimmy Boy]

I said this before on another thread I am not saying it's right or wrong just this is what the Nikky teach now.

As per Electricity at work regulations," No person shall be engaged in or or so near any Live conductor...." "Unless it is unreasonable in all circumstances for it to be dead".

taking of Zs using probes at non- socket points isn't necessary as it can be gained by calculation, therefore you don't have to test non-socket points with probes, you can use calcs, some may not agree but that is the NICEIC veiw or at least it was last time I was on a course at HQ Dunstable, whether thats an *** covering exercise is debatable but that's another discussion