Adding a new socket to a ring main

[Nickfromwales]

42 minutes ago, G and J said:

So with radial one could have an rcbo for each room’s sockets. (Maybe two rcbos for bigger rooms).  In terms of isolating faults and device failures that’s a fab idea.  Worth the cost of a bigger board and more rcbos/cable methinks. 

If you start fitting 2x RCBO's for 1x room, I will drive there and thrash you.

 

"NO".

[Mike]

1 hour ago, G and J said:

So with radial one could have an rcbo for each room’s sockets.... In terms of isolating faults and device failures that’s a fab idea.

Yes, that's the logic

 

Though RCBOs aren't used in France - instead there are RCDs (on the left of each row in the illustration) feeding a maximum of 8 miniature circuit breakers, with a minimum of 2 RCDs per property and a mix of circuits on each. That way, if one RCD trips, there is still light and power in a nearby room (or even the same one, if more than 1 circuit). I believe that's possible under the UK regs, but frowned upon - RCBOs are preferred, though with so many circuits it would jack up the price if used universally.

 

Although I have no RCBOs, I've upgraded all 4 RCDs to Type F, partly because they provide protection for electronic devices that the old A & AC don't, partly because they're also less liable to nuisance tripping.

 

 

Edited July 30 by Mike

[Nickfromwales]

49 minutes ago, Mike said:

Yes, that's the logic

 

Though RCBOs aren't used in France - instead there are RCDs (on the left of each row in the illustration) feeding a maximum of 8 miniature circuit breakers, with a minimum of 2 RCDs per property and a mix of circuits on each. That way, if one RCD trips, there is still light and power in a nearby room (or even the same one, if more than 1 circuit). I believe that's possible under the UK regs, but frowned upon - RCBOs are preferred, though with so many circuits it would jack up the price if used universally.

 

Although I have no RCBOs, I've upgraded all 4 RCDs to Type F, partly because they provide protection for electronic devices that the old A & AC don't, partly because they're also less liable to nuisance tripping.

 

 

Here, I do all RCBO CU’s, and enjoy the same luxury, only better. 
 

If an earth fault occurs in your scenario then all the MCB’s get disconnected. In mine only one offending circuit dies. 
 

One, not multiples of. 
 

Sorry, but there’s zero comparison.

[Mike]

18 hours ago, Nickfromwales said:

Here, I do all RCBO CU’s, and enjoy the same luxury, only better. 
 

If an earth fault occurs in your scenario then all the MCB’s get disconnected. In mine only one offending circuit dies.

Yes, that is the advantage of RCBOs. And if you don't have many circuits, as per standard UK practice, then the additional cost is low, so it's an easy decision to make.

 

Edited July 31 by Mike

[G and J]

23 hours ago, Nickfromwales said:

If you start fitting 2x RCBO's for 1x room, I will drive there and thrash you.

 

"NO".

I might have an open plan living space that’s so big it has to cross a time zone!  Thankfully I don’t and my heartfelt apologies for trespassing over the two RCBO in the same room line. 
 

I often hold the live wires from different sockets to enjoy the tingle so I can sort of start to imagine a safety angle.  Is that why it’s a no no?

[Nickfromwales]

27 minutes ago, G and J said:

my heartfelt apologies for trespassing over the two RCBO in the same room line. 

I'll belay the thrashing................for now, but I have my eye on you, mister....

 

27 minutes ago, G and J said:

I often hold the live wires from different sockets to enjoy the tingle so I can sort of start to imagine a safety angle.  Is that why it’s a no no?

Hopefully not whilst wearing a black PVC mask with no eyeholes.

[SteamyTea]

10 hours ago, Nickfromwales said:

I'll belay the thrashing

Ropes, cleats and whips?

[Nickfromwales]

1 hour ago, SteamyTea said:

Ropes, cleats and whips?

Was thinking more a-la Basil Fawlty vs car type of thing. 

[SteamyTea]

8 minutes ago, Nickfromwales said:

Was thinking more a-la Basil Fawlty vs car type of thing. 

Now you are being cruel to Austin 1100s