Finding the correct neutral to pull in a DB

[Gurnatronics]

So, I can’t turn off the board, can’t really turn off circuits except the one I am replacing with an RCBO. It’s all singles in trunking no sheaths to trace back to find the appropriate L and CPC, and obviously, nothing is labelled and they definitely aren’t in the correct neutral terminals.

Normally I would link out L&N and bell out neutrals as I pull the neutrals out the bar but that is no good on critical live systems.

Anyone got any hacks or tricks? I don’t want to tell them it’s a no go without a shutdown

Cheers

 

[westward10]

Use a kettle or fan heater.

 

[ipf]

Use a kettle.

I like that.........another good reason/excuse found for having a brew.....

 

[Gurnatronics]

I like that.........another good reason/excuse found for having a brew.....

Use a kettle or fan heater.

I was thinking that but didn’t want a search party mob with pitchforks and torches hunting us

 

[littlespark]

Using a kettle encourages you to do the test quickly…. It’ll boil and cut off within 5 minutes.

 

[padawan]

TJ Anderson is correct especially if its commercial environment. RAMS protect the client
in exceptional circumstances for live working, i would get written instruction from client as evidence, let them assess and manage the risk
you may also need special PPE
if the circuit earth is not identified, will you certify the work?
days of working live on busbars are gone

 

[Rockingit]

and always test for live using the back of your hand/fingers.

It's stupid, I know (in the hopefully unneccesary sense), but I always as a sub-conscious 'drilled into me as a nipper' kind of thing, always do tap the back of the finger onto ANY metal enclosure or panel that I have to engage with.

 

[pc1966]

It's stupid, I know (in the hopefully unneccesary sense), but I always as a sub-conscious 'drilled into me as a nipper' kind of thing, always do tap the back of the finger onto ANY metal enclosure or panel that I have to engage with.

Indeed, touch before you grip, just in case you can never un-grip!

Also old-timers working on valve gear would try and keep one hand in pocket so any shock would be largely confined to a hand. Going to hurt, and possible made worse by cutting the back of your hand whipping it out against any metalwork, but less chance of fibrillation death.

 

[Rockingit]

Indeed, touch before you grip, just in case you can never un-grip!

Also old-timers working on valve gear would try and keep one hand in pocket so any shock would be largely confined to a hand. Going to hurt, and possible made worse by cutting the back of your hand whipping it out against any metalwork, but less chance of fibrillation death.

It's also because a burn injury will heal faster on the back of your hand than the palm. I also was taught (and still do!) to work one handed in some situations - and the number of times I've opened up a panel and it all comes tumbling out where there's no dressage and too much untidy slack......

 

[Rockingit]

back to the OP - again, not 100% guaranteed - but if you think you've narrowed it down with a clamp meter, see if you can get the live/s in as well as the neutral - theoretically should be solid zero under a full load (unless there's a earth fault).

 

[loz2754]

back to the OP - again, not 100% guaranteed - but if you think you've narrowed it down with a clamp meter, see if you can get the live/s in as well as the neutral - theoretically should be solid zero under a full load (unless there's a earth fault).

As also suggested in post number 19