SWA protection with off peak

[Clinchy]

Hello,

Been to look at job, a barn that's been converted into separate flats. Each one is fed by a 10mm 3C SWA. On peak, off peak and neutral. Currently they just have a double pole main switch for isolation but no protective device. Is there a nice little unit I can use that's designed to deal with something like this? At the moment I thinking of using a 3p&n main switch and then each line on an MCB.

Many Thanks.

 

[littlespark]

10mm supply each? That doesn’t seem very big. Can’t have much in the flats.

 

[Simon47]

How about a 3P MCB ?
In principle, you have a setup that can overload the neutral if both peak & off peak supplies are in use - a 3P MCB will protect against that as well as L-E faults on either supply.

 

[mainline]

Hello,

Been to look at job, a barn that's been converted into separate flats. Each one is fed by a 10mm 3C SWA. On peak, off peak and neutral. Currently they just have a double pole main switch for isolation but no protective device. Is there a nice little unit I can use that's designed to deal with something like this? At the moment I thinking of using a 3p&n main switch and then each line on an MCB.

Many Thanks.

What's the earthing arrangement. ?

 

[Jock from the north]

Hello,

Been to look at job, a barn that's been converted into separate flats. Each one is fed by a 10mm 3C SWA. On peak, off peak and neutral. Currently they just have a double pole main switch for isolation but no protective device. Is there a nice little unit I can use that's designed to deal with something like this? At the moment I thinking of using a 3p&n main switch and then each line on an MCB.

Many Thanks.

I take it there's no gas supply obviously but what other main protective bonding conductors are required .

 

[Clinchy]

Cheers for the replies.

They are shoe box bedsits, 1 storage heater, immersion, cooker, shower.

It's a TNCS

No gas, no oil, plastic water main.

How about a 3P MCB ?
In principle, you have a setup that can overload the neutral if both peak & off peak supplies are in use - a 3P MCB will protect against that as well as L-E faults on either supply.

Thanks, that sounds more tidy than my idea.

 

[Jock from the north]

It seems crazy the shower will be the same size as main supply but I suppose you could have a 16mm t and e feeding 11 kw shower due to the instalation method ,glass wool ,volt drop etc with a 16mm split con and 80 amp fuse at service head and you would think nothing of it

 

[Jock from the north]

For prob an extra 50 quid per flat could have went to 16mm .