Safe Isolation!

[Edwardioo]

Would i be right in saying this is how to perform safe isolation?

Single Phase:

Permission to test
Prove testers on know supply
Isolate Breaker
Prove testers again
Lock Off
Sign Up (Safety signs eg Electricians at work dont enter etc..)

Cheers Ed.

 

[Sintra]

The procedure for proving dead should be by use of a test lamp or two pole voltage detector as recommended in HSE Guidance Note GS38.
Non-contact voltage indicators (voltage sticks) and multi-meters should not be used. The test instrument should be proved to be working on a known live source or proprietary proving unit before and after use. All phases of the supply and the neutral should be tested and proved dead.

 

[Edwardioo]

The procedure for proving dead should be by use of a test lamp or two pole voltage detector as recommended in HSE Guidance Note GS38.
Non-contact voltage indicators (voltage sticks) and multi-meters should not be used. The test instrument should be proved to be working on a known live source or proprietary proving unit before and after use. All phases of the supply and the neutral should be tested and proved dead.

But in general am i right?

 

[Sintra]

So long as you prove your tester on a known source before and after testing for dead then that is fine.

 

[Edwardioo]

Cheers Matey!

 

[MarkieSparkie]

Proving an approved voltage tester on a known supply would be an infringement EAWR as it states work must be done dead unless this is not possible. By doing a safe isolation you by definition can work dead. Therefore a proving unit must be used.

 

[Edwardioo]

Proving an approved voltage tester on a known supply would be an infringement EAWR as it states work must be done dead unless this is not possible. By doing a safe isolation you by definition can work dead. Therefore a proving unit must be used.

How do you prove your proving unit works?

 

[SirKit Breaker]

But in general am i right?

No.

There is only one way to prove dead. Approved voltage indicator, and proving unit. Using proving unit confirm voltage indicator Indicates. Isolate, lock off an post notice. Use voltage indicator to prove installation is dead, then re prove voltage indicator still indicates.

This is the only way to prove dead as per the EAWR and HSE GS38.

Cheers.........Howard

 

[SirKit Breaker]

How do you prove your proving unit works?

It has to be calibrated, and have a good battery in it.

 

[thekingiam]

Proving an approved voltage tester on a known supply would be an infringement EAWR as it states work must be done dead unless this is not possible. By doing a safe isolation you by definition can work dead. Therefore a proving unit must be used.

sure it states in regs known supply or proving unit, i think the term work does not include testing as you have to do live testing to prove safety of supply before introducing loads

 

[Sintra]

Proving an approved voltage tester on a known supply would be an infringement EAWR as it states work must be done dead unless this is not possible. By doing a safe isolation you by definition can work dead. Therefore a proving unit must be used.

How do you do your Ze then?
The supply side of the main switch would be the known source and also the point were you would conduct a Ze test.

 

[thekingiam]

i havent got 17th eddition yet to but just found an old brian scadden fifth edition and it states known supply, dont think proving units were invented then?
i dont believe you need to prove on a proving unit unless the powers that be got a cut in proving unit suplies.

 

[MarkieSparkie]

You can only do a Ze test live so that is in keeping with EAWR. Using the live side of the isolated main switch is NOT acceptable to prove an approved voltage tester under EAWR. If you work on industrial installations, your permit to work will state specifically the limitations imposed on you with regard to live working, to ensure compliance with EAWR.

 

[thekingiam]

You can only do a Ze test live so that is in keeping with EAWR. Using the live side of the isolated main switch is NOT acceptable to prove an approved voltage tester under EAWR. If you work on industrial installations, your permit to work will state specifically the limitations imposed on you with regard to live working, to ensure compliance with EAWR.

are you saying you cannot test your approved voltage tester on another protected supply as in another ring circuit?

 

[telectrix]

there is a difference between live working and live testing. if iy's not permitted to use the incoming live terminals to prove your tester , then it's also not permitted to measure Ze. or PFC at source. honestly, we are turning into a load of fairies with all this nonsense. next thing we'll all be wearing rubber suits to plug in MFTs.