Shock Origin?

[Mike2007]

I isolated a CU the other day(flicked main switch), tested bus bar and it was dead! Changed over some fuseways and zing!! Got a belt!
One circuit was the garage cable, might there be a capacitor on something in the garage (detached shed). Thought that was the last of it and got another 5 mins later...

Would that have been a full 230v coming back to ground itself or less?
Only one distribution board.

 

[RF Lighting]

What type of testers were you using?

What did you test the busbar to?

 

[Mike2007]

What type of testers were you using?

What did you test the busbar to?

I have got an Alphatec voltage indicator and a Fluke 1652 and was testing incoming mains not appliances on the circuits.

 

[RF Lighting]

but what did you test the busbar to?

Earth, neutral, both and then tested neutral to earth aswell?

 

[Mike2007]

but what did you test the busbar to?

Earth, neutral, both and then tested neutral to earth aswell?

Phase to neutral.

 

[RF Lighting]

Is it possible that the live contact of the switch did not disconnect?

This would give you a 0V reading when testing live to neutral, when the installation is infact still live.

This is why you must always test every live conductor to each other AND earth.

 

[Mike2007]

Is it possible that the live contact of the switch did not disconnect?

This would give you a 0V reading when testing live to neutral, when the installation is infact still live.

This is why you must always test every live conductor to each other AND earth.

I will go back and re-test, looking for all possibilities in current paths.