Supply type

[andy]

just an idea. have a main 100A isolator feeding 2 RCD's. one 4 sockets etc (what would normally be RCD protected on TNC(S)) and another for the other stuff. ie lights

 

[AliasOmega]

Thats a good idea as otherwise if on the same board, the washer could trip the power, and lights out therefore putting you in a position that you may not want to be in.

You could put everything on the rcd, but then a dedicated lighting circuit that was not covered (ie stairs lights, alarm power)

Or fit emergency lights....err..

 

[sh]

Listen guys,i'm sorry for not grasping this but if as I suggested I replace the 100A incomer on the split board I have already bought (contactum 14 way)with this
[url]http://www.tlc-direct.co.uk/Products/BH80slash2slash100.html [/url] would it not still be acting as a split board and give me discrimination whilst still providing the total Rcd coverage I need for my TT system.
Many Thanks

 

[AliasOmega]

If you fitted this switch, you could not have anything more than a 80amp fuse in the main cut out as the lowest main switch rating would be 80amp, i think they normally fit 60amp cartridge fuses unless you have a exceptional large house.

The 100mA RCD as mentioned in that link, would work no different then the non RCD main isolator BUT has the RCD side of things therefore protecting the whole board as required.

You would still have the protection of the protected side of the board (ie ground floor sockets, showers) and then the protection of the 100mA RCD aswell..



You could leave the Main Switch in place, and fit a 100mA RCD inbetween the meter and the consumer unit. This would be all down to cost, you can pick up old 100mA RCD's as these were used in all the old pubs, that are now out of date..(ie 30mA). Check eBay for them.

 

[ban-all-sheds]

Listen guys,i'm sorry for not grasping this but if as I suggested I replace the 100A incomer on the split board I have already bought (contactum 14 way)with this
[url]http://www.tlc-direct.co.uk/Products/BH80slash2slash100.html [/url] would it not still be acting as a split board and give me discrimination whilst still providing the total Rcd coverage I need for my TT system.
Many Thanks

For the third time:

That 100mA Contactum RCD you keep going on about is not a time delayed one.

If your main incomer is not time delayed, then the fact that it is a 100mA trip vs the socket RCDs 30mA trip does not guarantee discrimination. That's why they make time delayed RCDs, and that's why you should use one as the main incomer on a TT installation.

 

[ban-all-sheds]

just an idea. have a main 100A isolator feeding 2 RCD's. one 4 sockets etc (what would normally be RCD protected on TNC(S)) and another for the other stuff. ie lights

How's that going to work?

 

[ban-all-sheds]

You could leave the Main Switch in place, and fit a 100mA RCD inbetween the meter and the consumer unit. This would be all down to cost, you can pick up old 100mA RCD's as these were used in all the old pubs, that are now out of date..(ie 30mA). Check eBay for them.

And they'll be time-delayed ones, will they?

 

[kai]

If I were you, I would NEVER buy secondhand MCB or RCD equipment, you don't know their history, and if they have broken a fault in excess of their safe capacity etc, you put your life at risk if you use old cast offs etc.

I would rather install a Volex unit, than use secondhand RCDs or MCB's!