RaceDiagnostics
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diversity is used so they arent all carrying full current at the same time
Unless an EV or other high current/use circuit is added it’ll probably be ok, but technically the RCD isn’t protected against overload, You can’t use diversity for overload protection, that’d be like wiring a 32a ring in 1.0mm and saying it’s only for some USB chargers so it’ll be okVery little chance of them getting warm in any normal use.
It doesn'tatter what the writing on the fuse or circuit breaker says, the actual load will be pretty small in a house.
Through the magic of diversity the average house could run off a 20A fuse without incident.
With thermal damage yes, no thermal damage C3 but all codes are down to the discretion of the inspector.Isn’t that technically a P2 on an EICR? I’m presuming the Cutout fuse is 100a.
Not sure haven't had much to do with MK, same manufacturer so in theory yes but depends how they sit on the busbar.
No problem, I'll pick one up at Screwfix tomorrow and see if it fits.Not sure haven't had much to do with MK, same manufacturer so in theory yes but depends how they sit on the busbar.
I think it's this later version in your link that I have some spares of.
Unless an EV or other high current/use circuit is added it’ll probably be ok, but technically the RCD isn’t protected against overload, You can’t use diversity for overload protection, that’d be like wiring a 32a ring in 1.0mm and saying it’s only for some USB chargers so it’ll be ok
everything carrying current should be protected against overload, normally by an upstream protection device (in this case cutout fuse) which will operate before the downstream rating is exceeded.
The 63a rating is saying that’s the max current the RCD can pass normally, In reality it would probably survive more but it’s not technically safe. From @RaceDiagnostics PoV, if you know you aren’t gonna pull more than 63A on those circuits for any length of time then I’d leave it but someone in the future might use it differently. Isn’t that technically a P2 on an EICR? I’m presuming the Cutout fuse is 100a.
In your example, you are actually protecting against overload by using a fixed load which is unlikley to create an overload. Hence why I said overload protection is ‘normally’ provided by an OCPD, but left the door open for other methods such as the one you described. How oftem is that used in a domestic building? The point is the cable, connectors, switchgear etc are all rated for the max current they will ever receive. The CU one is different because the loads aren’t fixed, so you can’t use it to limit the current.You are incorrect about everything carrying current needing protection from overload. For example where a load is not subject to overload faults overload protection is not required, electric heating elements fall in to this category.
i dont like . if one socket packs in its very expensive to change
Why would they ? That's like saying the 3 amp fuse in my lamp plug is getting warm as it's connected to a 32 amp breakerAnyone else think those RCD’s could be getting a bit warm seeing as they are rated for 63a and are protected by what looks like a cutout 100a fuse? Especially the one on the left with all the tasty 40/32a ccts on…
That’s because the RCD isn’t a fuse so has no ability to limit the current through it..if it was an RCBO it’d be absolutely fine (and be like your example)Why would they ? That's like saying the 3 amp fuse in my lamp plug is getting warm as it's connected to a 32 amp breaker