Single Module Double Pole RCBO over 40 amps?

[phxl]

With for example the Wylex NXHL1B Single Module DP range of RCBO's there is (at last) a sensible solution to RCD protection for all circuits individually, but only up to 40 amps. Is there a manufacturer doing 50 amp single module double pole rcbo's e.g for thirsty 10 kw or 11 kw large cookers and showers?

 

[Octopus]

What make is the fuseboard?

 

[phxl]

With for example the Wylex NXHL1B Single Module DP range of RCBO's there is (at last) a sensible solution to RCD protection for all circuits individually, but only up to 40 amps. Is there a manufacturer doing 50 amp single module double pole rcbo's e.g for thirsty 10 kw or 11 kw large cookers and showers?

New installation so not decided yet which board... so which ever one offers a 50 amp single module DP.

 

[Andy78]

The only other DP single module RCBO I know of is from SBS trade sales, but they are only to 40A maximum too.

 

[MDJ]

MEM, you get the rcbo pod and add what breaker size you like, even 63 amp

 

[MDJ]

PS, avoid RCBOs with cookers if you can lol

 

[Octopus]

PS, avoid RCBOs with cookers if you can lol

Why ?

 

[MDJ]

Why ?

I find they trip when the oven gets older, the elements deteriorate and trip the RCBOs, I have lost count of call outs over the years where the oven is the reason, Obviously on a TT there is no avoiding this, but I would wire an oven and a fridge as well to the regs so an RCBO or RCD wasn't required if I could, JMO.

 

[Octopus]

^^ interesting

I find it’s washing machines and dish washers that cause aggro.

Just yesterday our aged washing machine tripped the rcbo ... so to empty it I ran an extension lead from our fridge freezer socket (dedicated circuit mcb) ... and emptied it ......

Anyway a cooker on a rcbo isn’t an issue ..

 

[Midwest]

MEM, you get the rcbo pod and add what breaker size you like, even 63 amp

The RCD pod is for just SP, as far as I'm aware.

 

[Marvo]

I find they trip when the oven gets older, the elements deteriorate and trip the RCBOs, I have lost count of call outs over the years where the oven is the reason, Obviously on a TT there is no avoiding this, but I would wire an oven and a fridge as well to the regs so an RCBO or RCD wasn't required if I could, JMO.

Wouldn't that be all the more reason to put a cooker on an RCBO, that way if it deteriorates it's disconnected plus there's no nuisance to other circuits?

 

[phxl]

P.s. Just noticed my opening thread should have read " Wylex NHXS1" not Wylex NHXL1; These RCBO’s include switched neutral as standard.

This stops the old Neutral to Earth fault causing problems when fault-tracing as it provides full separation of circuits.

They do not however retrofit onto the "balcony " style busbars that were common in Wylex.

The new Regulation, 536.4.203 (devices and components that are used in low voltage assemblies, such as consumer units, must only be those that have been declared suitable for that purpose by the manufacturer of the assembly.Or put another way. Only use manufacturer approved parts, don’t mix brands of devices, or control items. Using unapproved parts will invalidate manufacturer guarantees and may result in an unsafe installation...) (see: www.electrium.co.uk/news/how-to-choose-the-right-consumer-unit-and-what-to-put-in-it) rules out mixing makes and vintage within a dist board. That all devices fit a standard din rail yet fits to busbar vary so much has always been a source of danger from poor contact overheating etc.

The fact that the new single module DP rcbo's are so compact hopefully does not impede their reliability... particularly in the case of 32 and 40 amp ratings? They have not been around long enough to know yet so this injects an air of caution about using them.

 

[MDJ]

Wouldn't that be all the more reason to put a cooker on an RCBO, that way if it deteriorates it's disconnected plus there's no nuisance to other circuits?

I don't like any appliances on RCBOs, my kitchen ring is on a breaker, the other house sockets on a RCBO, and I have a seperate circuit for the fridge as well lol

 

[DPG]

That's a new one - omit RCD protection because it may trip when the appliance deteriorates in years to come.

Plus how are you wiring the circuits to the appliances to obviate the need for RCD protection?

 

[MDJ]

I have metal conduit in the wall down to my sockets from the floor above, I agree with Murdoch about washing machines etc, they nusience trip, as do most appliances, I don't like RCBOs on kitchen appliances, and won't change my mind