Rings or Radials ....

[Octopus]

Just started on a complete refurbishment / extension on a 3 bedroom property which is having a complete rewire.

I'm not keen on Dual RCD boards, nor trying to have as few circuits as possible ....

So when it comes to the socket circuits I was thinking of:

Radial 20A for hall, lounge and dining room
Ring 32A for kitchen
Radial 20A for upstairs

Anyone like to comment?


PS the plumber was asking me today why I was installing 35 mm boxes - he seemed to think 25 were always best!

 

[Leesparkykent]

I've fitted a few RCBO only, but MK only, errkk!. The rest are somewhat more expensive, unless the client doesn't mind paying more?

I can get a 10way lewden/control gear board with 8 RCBO's for £99

 

[Octopus]

I fit the Control Gear units - as Lee says - a small premium, for a simpler set up and far easier to fault find when it starts tripping.

 

[Andy78]

I have used the lewden boards too. Seem fine to me.

 

[Toneyz]

I stopped fitting dual RCD boards when the AMD3 rules came along - RCBO boards everytime since then.[
Deleted

 

[Dozer 73]

Only problem with 35mm boxes , not so good on the single skin walls , very easy end up in next room

 

[123]

Only problem with 35mm boxes , not so good on the single skin walls , very easy end up in next room

Are you chasing the walls with a jack hammer or something?

 

[Dozer 73]

Are you chasing the walls with a jack hammer or something?

Of course , why what do you use
Residents aren’t usually too happy with a compressor in their living room though

 

[123]

I fit the Control Gear units - as Lee says - a small premium, for a simpler set up and far easier to fault find when it starts tripping.

What do you fit if it's TT?

 

[123]

Of course , why what do you use
Residents aren’t usually too happy with a compressor in their living room though

Wall Chaser and SDS Chipping Hammer - have yet to burst into the next room with 35mm deep boxes

 

[Dozer 73]

Can’t say I’m an expert on the house bashin so I,ll stand corrected
And probably leave it to the specialists

 

[Octopus]

What do you fit if it's TT?

not had one yet but I'm thinking 100 mA RCD in place of the 100a dp switch

 

[Leesparkykent]

not had one yet but I'm thinking 100 mA RCD in place of the 100a dp switch

Wouldn't be a good idea with them control gear RCBO's due to not being double pole or SPSN. The new wylex compact RCBO's are SPSN I believe.

 

[Ian1981]

deleted

 

[westward10]

Wouldn't be a good idea with them control gear RCBO's due to not being double pole or SPSN. The new wylex compact RCBO's are SPSN I believe.

Does that matter if they are only being used for circuit protection and not isolation with the main double-pole rcd supporting them.

 

[Leesparkykent]

Does that matter if they are only being used for circuit protection and not isolation with the main double-pole rcd supporting them.

well yeah unless you want the whole board tripping in the event of a neutral-earth fault...RCBO trips, as it's solid neutral the neutral isnt disconnected so takes out the upfront time delayed RCD.