Discuss two radials into an RCBO in the UK Electrical Forum area at ElectriciansForums.net
Fine, you'd put 2 into same terminal if part of a RFC.that is two L wires into the one RCBO?
So best to join them via a J box with one cable running into the RCBO. Cludgy, not as good, but within regs.It happens a lot and will be fine.
Regs wise I don't think it's the answer you want:
314.4 Where an installation comprises more than one final circuit, each final circuit shall be connected to a separate way in a distribution board
I know, but the regs can defy themselves.Fine, you'd put 2 into same terminal if part of a RFC.
6A Two 2.5mm cables.What fuse rating is this RCBO
So are they lighting?
One radial is a small fridge, one a boiler. Both together consume well under 6A with many amps to spare. My query was about two radials into one RCBO.So are they lighting?
We should try not to put all lights in the same circuit, so one fault doesn’t wipe out everything….
It will be classed as one 6 AMP circuitOne radial is a small fridge, one a boiler. Both together consume well under 6A with many amps to spare. My query was about two radials into one RCBO.
A 2.5mm cable can be taken from the RCBO to a FCU next to the CU. Then daisey chained off to the boiler, which has its own local FCU. Then the fridge cable off the FCU near the CU. One cable only into the RCBO and DP isolation for the fridge. It would be a radial to the boiler with a sub radial off that to the fridge. Sorted.It happens a lot and will be fine.
Regs wise I don't think it's the answer you want:
314.4 Where an installation comprises more than one final circuit, each final circuit shall be connected to a separate way in a distribution board
Can you consider them to be one final circuit with a spur that happens to be at the CU?
You certainly can if you like, but it's not actually required as per other posts as it is legitimately one final circuit with a branch.A 2.5mm cable can be taken from the RCBO to a FCU next to the CU. Then off to the boiler, which has its own local FCU. Then the fridge cable off the FCU near the CU. One cable only into the RCBO and DP isolation for the fridge. Sorted.
It would also give DP isolation to an integrated fridge.You certainly can if you like, but it's not actually required as per other posts as it is legitimately one final circuit with a branch.
There isn't a right answer here - we'd all prefer not to add joints if not required, and we'd prefer not to stick two legs in an RCBO.
I'd probably gravitate to the latter option personally.
People like a fridge on their own circuits so if another circuit is at fault the fridge is not taken out,I'd make one more comment - perhaps the reason the boiler and the fridge were on separate radial circuits was because they are either (a) somewhat important circuits that could be problematic if tripped, or (b) the loads (at least the boiler or associated valves/pump) are prone to faults. I know most properties don't provide that luxury, pity to take it away.
The Wylex is ÂŁ70 (taking the mick) to BGs ÂŁ38. If two radials are joined there is another way available. Not sure if the BG will fit a Wylex.Is this Wylex single module type 2 SPD of any interest:
It is a bus-bar connection too....Wylex NMT2SPD3W/1 Surge Protection Devices
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But your adding the boiler to this circuit ?, so it is not on its own anymore.People like a fridge on their own circuits so if another circuit is at fault the fridge is not taken out,
In my experience it's usually the bus bar alignment that is the biggest issue, which as someone said wouldn't apply to an SPD which connects to an MCB.The Wylex is ÂŁ70 (taking the mick) to BGs ÂŁ38. If two radials are joined there is another way available. Not sure if the BG will fit a Wylex.
The BG can fit onto a Din rail. Not sure if it fits a Wylex busbar, or any busbar.By the letter of the regs. , no, but it depends if you're an engineer or a sheep. I have no problem mixing different makes in a full DIN rail CU, as long as they fit properly.
This doesn't connect to the busbar, so no pulling out of shape. The only possible issue is to make sure the front part projects through the front panel enough to meet the IP rating, which it almost certainly will.
Yep. A compromise.But your adding the boiler to this circuit ?, so it is not on its own anymore.
I always follow this, it is two final circuits therefore separate circuit protection.@brianmoooore I agree in this case, and must have missed the previous thread on this.
Out of interest, would your comment mean that 314.4 can never actually be broken if combining radial circuits?
Reply to two radials into an RCBO in the UK Electrical Forum area at ElectriciansForums.net
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