Reg no for main switch on tnc-s

[bigspark17]

Should main switch on tncs isolate all poles.? Switch in the pic only isolates the three phase conductors!
Reg no?

 

[Andy78]

There is no requirement to isolate the neutral in TN systems as far as I know except for domestic situations where the switch is intended for use by householders.

 

[Wilko]

Andy correct as always
537.2.1.1 - says for TNS and TNCS its not required to sw neutral
537.2.1.7 - provision of a way to ISO neutral must be provided (a link)
537.1.4 - single phase domestic both L & N to be sw.

 

[bigspark17]

Thanks both! If there was a thanks button id hit it

 

[Andy78]

Thanks both! If there was a thanks button id hit it

Just send us money instead

 

[andyb]

I looked for ages at this picture for the main switch Bigspark. Then I saw you pointing at it.

 

[Andy78]

I looked for ages at this picture for the main switch Bigspark. Then I saw you pointing at it.

I think he's actually pointing at the sticker posted by the NICEIC contractor that appears to state an installation date of June 2014 and recommends the next test date as June 2014. Maybe not very confident in their work ....... lol.

 

[andyb]

I think he's actually pointing at the sticker posted by the NICEIC contractor that appears to state an installation date of June 2014 and recommends the next test date as June 2014. Maybe not very confident in their work ....... lol.

A least they're not responsible if something goes wrong a couple of days after testing Andy.
Past its retest date.

 

[westward10]

Needs a bigger 415V notice having trouble seeing it.