63A Cooker on 45 A wylex rewireable fuse board

[paul_griff]

My brother asked me to wire in his new cooker which sounded straightforward till I found the existing gas oven/electric hob cooker was just plugged in and found his new cooker took 63 A before applying diversity. No spare circuits on old 6 way wylex re-wire able fuse consumer unit, with a 45A fuse on the incomer. Told him that he needs a new consumer unit fitting.
Anyone got any other thoughts on this?

 

[Brightspark2]

The cooker says its rated at 63A does it?...


Seems alot...

 

[Guest55]

45A DNO service fuse ?
well if it is then it needs uprating as well.
You could just add a small stand-alone 2 way CU just for the cooker instead of changing wylex fuseboard , will save your bro a bit of cash.

 

[fulla]

never seen a 63 amp cooker designed for domestic installation

 

[cakey]

63a sounds alot... Probably less than this in reality. What circuit is it plugged into? Fuse? Cable size?

 

[SPARTYKUS]

My brother asked me to wire in his new cooker which sounded straightforward till I found the existing gas oven/electric hob cooker was just plugged in and found his new cooker took 63 A before applying diversity. No spare circuits on old 6 way wylex re-wire able fuse consumer unit, with a 45A fuse on the incomer. Told him that he needs a new consumer unit fitting.
Anyone got any other thoughts on this?

hello paul_griff

did you get 63A by dividing the "total Wattage" on the back by 230 Volts? (about 14.5 kW) ?

Just guessing cos seen a few cookers like that.

Is it a huge "Flavel" or rangemaster with gas rings on top?

It may be that the 'gas' bit has been included in the total figure .... don't want to assume thats the case but worth a mention.

If so there should be another figure on the back just for total electrical power. And even then it won't be a direct comparison of that figure with the CCC of a cable. As I'm sure you know.

S.

 

[paul_griff]

The cooker says its rated at 63A does it?...


Seems alot...

63 A calculated by adding all hobs and ovens watts together and dividing by 230 volts, it is a big double size range type cooker with ability to wire as single or three phase.

 

[SPARTYKUS]

Wow sounds a heffer. Any gas?

 

[paul_griff]

45A DNO service fuse ?
well if it is then it needs uprating as well.
You could just add a small stand-alone 2 way CU just for the cooker instead of changing wylex fuseboard , will save your bro a bit of cash.

45 A fuse is built into the wylex board, in a large 4 bedroom house so don't really want to add a 2 way unit to it, although that is a possible option. Don't really like the old wylex boards, have heard that they are not up to the fault currents that are potentially present

 

[paul_griff]

63a sounds alot... Probably less than this in reality. What circuit is it plugged into? Fuse? Cable size?

This is a new cooker not wired in yet, hence the problem

 

[paul_griff]

hello paul_griff

did you get 63A by dividing the "total Wattage" on the back by 230 Volts? (about 14.5 kW) ?

Just guessing cos seen a few cookers like that.

Is it a huge "Flavel" or rangemaster with gas rings on top?

It may be that the 'gas' bit has been included in the total figure .... don't want to assume thats the case but worth a mention.

If so there should be another figure on the back just for total electrical power. And even then it won't be a direct comparison of that figure with the CCC of a cable. As I'm sure you know.

S.

Yep that's how I got 63 A it is a range type cooker double normal cooker size, all electric, two ovens and six hobs, can be wired single or three phase, even with diversity applied it works out about 27 A

 

[cakey]

This is a new cooker not wired in yet, hence the problem

What's the existing one plugged into? If a new circuit needed then in my opinion change the whole cu.

 

[paul_griff]

Wow sounds a heffer. Any gas?

No gas that's half the problem, his old one had gas hobs and the oven part just plugged in, hence no cooker point

 

[truckster]

Just a thought, is there an existing cooker circuit in the board? Seen a socket slapped on the existing 6mm for a plug in cooker. Apply diversity and you will get it on a 32A breaker

 

[paul_griff]

What's the existing one plugged into? If a new circuit needed then in my opinion change the whole cu.

Existing cooker is gas hobs and electric oven, oven is on 13a plug plugged into ring main no problem. Glad you agree that you would change the whole CU, he has got young kids so having RCD's would be a great safety benefit too.