Temp hooking up a pair of 16a ovens for Christmas day..

[Avo Mk8]

I really doubt the actual load will be anything like enough to blow the 13a fuses either.

If it blows the fuse, then that's about the worst that can happen and I'll sort the 16a supplies on the existing cooker circuit.

16A won't blow the 13A fuse. In fact 20A shouldn't blow it if it's made to spec.
Might make the plug (tops?) a bit hot though.

 

[Deuce]

Regs state that e

The distro in question will almost certainly have a 16a MCB/RCBO on the source side - so therefore plugging in a 16a ceeform attached to a 17A rated (at least) cable is indeed no issue. What it's feeding is irrelevant because we fault and overload protect the cable, not the device (that's down to the manufacturer to do).

No I meant plugging a 32a 1ph splitter cable into the distro which then splits down to 2 or more 16a sockets. I've just googled and I see that all such currently sold splitters have the MCB's mounted on the cable now, makes sense.

I still definitely see people using older splitters to go from 32a to multiple 16a without and inline protection though... I work in automation and SFX so I'm not as upto date with power regs as you will be.

 

[Rockingit]

32>2x16a 1ph splitter

Such a thing should never exist and if I see one then my snips are rarely far behind.

 

[Deuce]

Such a thing should never exist and if I see one then my snips are rarely far behind.

They do exist though, Although I appreciate they should not and why.

Like riggers that should never scale truss without at least one safety lanyard hooked on and people on scissor lifts without a hard hat..

 

[mainline]

Regs state that each and every component of a circuit needs to be able to cope with the maximum demand that may be put upon it under fault conditions - so in this case that would be 40A of the upstream MCB.

The circuit from the 32amp mcb is fed in to a load which cannot draw more than about 26 amps, that's not allowing for diversity, so how can it be overloaded ?

 

[loz2754]

It could be argued that, because the load is supplied via a 16 amp socket outlet, then it is not a fixed load, as anyone could plug anything into that socket.
In this particular case though, it's unlikely that would happen.

 

[Deuce]

The circuit from the 32amp mcb is fed in to a load which cannot draw more than about 26 amps, that's not allowing for diversity, so how can it be overloaded ?

I assume he meant in my original example of using 2 x 16a plugs/sockets onto the existing cooker circuit which has 32a protection. In theory either oven could develop a fault and draw enough current to exceed what the plugs/sockets can handle but not enough to trip the 32a mcb..

A problem avoided entirely with the 13a plugs as they have the fuse protection in the plug.

 

[Rockingit]

The circuit from the 32amp mcb is fed in to a load which cannot draw more than about 26 amps, that's not allowing for diversity, so how can it be overloaded ?

See 512.1.2 (ii)

 

[mainline]

It could be argued that, because the load is supplied via a socket outlet, then it is not a fixed load, as anyone could plug anything into that socket.
In this particular case though, it's unlikely that would happen.

They can still only draw 16amps from each

If the load is fed from socket outlets, then they each will be fused down so can't be overloaded.
If fed from 16amp commando sockets, they still can't be overloaded.
If hard-wired in, they still can't be overloaded.

 

[loz2754]

If fed from 16amp commando sockets, they still can't be overloaded.

As I said, anyone could plug anything into such a socket, so it could in theory be overloaded.
And also as I said, it's very unlikely to happen though in this case.