No live testing except where it's a must

[Les Macaulay]

Do you agree that we only should be working dead when establishing the Zs for final circuits other than socket outlet circuits? That is, don't use the line, neutral and earth probes of the E/L tester except for Ze and Ipsc. Simply add R1+R2 to Ze.

 

[Silly Sausage]

No!...

 

[Adam W]

A calculated Zs is only theoretical and can be different from a measured Zs, so IMO Zs should be measured unless it really will be dangerous (eg require dismantling live equipment). You can get ES and BC adaptors for light fittings and putting probes on live FCU terminals is hardly 'dicing with death'.

 

[Sintra]

Absolutely not. Always test Zs on all circuits how else would you know your circuit complies with the values for maximum permitted Zs. Calculations do not allow for high impedances through some MCB's, RCD's etc.

 

[markc123]

Health and Safety gone mad these days, if you follow the book then Les you're probably correct...no live testing where possible. However, have to agree with Archy and Adam on this one...a measured Zs is far better on the cert than a theoretical one IMO. I think it is acceptable to add R1+R2+Ze for every circuit if you want, but i personally prefer a measured value when/where possible.

 

[Des 56]

I won't answer your question directly because I understand my favourite scam suggest what you say

I will however say that once upon a time Electricians were taught to work with electricty,now make of that statemnt what you will

One clue I will reveal,live working focuses my respect if not any avoidance fears

 

[markc123]

Absolutely not. Always test Zs on all circuits how else would you know your circuit complies with the values for maximum permitted Zs. Calculations do not allow for high impedances through some MCB's, RCD's etc.

Completley agree. I think though, that if your theoretical Zs complies it's fine...which is stupid. Theres an apprentice, that used to do abit with me - now with another sparky i know, and apparantly on the 2395 testing and inspection practical exam they wouldn't allow any live testing of the circuits...all measured, and this was fine by them.

 

[trev]

We are supposedly skilled professionals, if we can't conduct a live test safely then perhaps we're in the wrong line of work.

 

[THE INVERTER]

Re: No live testing except where it's a must

​

Trying to work out how to do a dead Ze test
lol

 

[Adam W]

Re: No live testing except where it's a must

​

Trying to work out how to do a dead Ze test
lol

Do you agree that we only should be working dead when establishing the Zs for final circuits other than socket outlet circuits? That is, don't use the line, neutral and earth probes of the E/L tester except for Ze and Ipsc. Simply add R1+R2 to Ze.

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