Hob power ratings
 

I am replacing a solid-plate hob (5.5Kw) with a ceramic hob (6.4Kw) . There
is a 30 amp fuse and cooker control unit. should this be OK for a straight
swap over?


Regards and thanks in advance


PJM

Syke wrote:
I am replacing a solid-plate hob (5.5Kw) with a ceramic hob (6.4Kw) . There
is a 30 amp fuse and cooker control unit. should this be OK for a straight
swap over?


Regards and thanks in advance


PJM


Yes. 1kW = 4A at 240V, near as dammit. 6.4 of your earth kilowatts
thusfore means some 26A, so your circuit should be fine. (A purist would
recite all the ways in which the existing circuit might've been right on
the limits for the lower-rated, 5.5kW so 22A, previous load... but in
the real world, you'll be fine). This is the peak load - in practice
(and this is Officially Sanctioned by the Regs Themselves ;-) your hob
will be a smaller load, with not all elements being on
simultaneously-like - even if you've got them all switched on, their
temperature controls will be bringing them in and out of circuit).

I am replacing a solid-plate hob (5.5Kw) with a ceramic hob (6.4Kw) .
There
is a 30 amp fuse and cooker control unit. should this be OK for a straight
swap over?

No problem whatsoever, assuming the existing circuit is correctly designed
for its fuse. You should even get away with an oven on the same circuit,
although you'd need to check its rating. The total is allowed to go
substantially over the circuit rating in this case.

Christian.

"Christian McArdle" wrote in message
et...
I am replacing a solid-plate hob (5.5Kw) with a ceramic hob (6.4Kw) .
There
is a 30 amp fuse and cooker control unit. should this be OK for a
straight
swap over?

No problem whatsoever, assuming the existing circuit is correctly designed
for its fuse. You should even get away with an oven on the same circuit,
although you'd need to check its rating. The total is allowed to go
substantially over the circuit rating in this case.

Christian.



Thanks to all responders. I fitted the hob today and it works fine. There
IS an oven on this circuit, rated at 2.18 Kw Max, but as it's still working,
I assume everything's OK!

Regards

PJM

Syke wrote:


Thanks to all responders. I fitted the hob today and it works fine. There
IS an oven on this circuit, rated at 2.18 Kw Max, but as it's still working,
I assume everything's OK!

Not *quite* the best of assumptions - sustained overloads which damage
cable insulation but don't cause the fuse/MCB to trip are insiduous and
quite possible. (A 30A-nominal RCD will pass, say, 36A effectively
forever, probably 40A too...) But in your case, even with the oven on
the circuit you should be fine.