OVEN LOAD CONNECTION

[Albert]

Hi,
I'm in the middle of checking my elec. wiring, i found that the oven that rated 5.1Kw (manufacturer value), in connected to a 20A MCB in a radial circuit.
I don't think that the radial circuit is a problem, but the 20A MCB, calculating the load considering the diversity, I found that the load (which without diversity would be 22.17A), is 21.65A, the wire is 4mm2.
According to the OSG, the cable can take 37A (method 1), i'm tempted to change the MCB to 32A, any suggestions?
Albert

 

[plugwash]

yeah that should be fine

 

[Albert]

yeah that should be fine

thanks,
should be fine to leave as is or should be fine to change the MCB to 32A?
Albert

 

[plugwash]

either is probably ok

diversity guidelines are just guidelines

personally i probably wouldn't bother swapping it unless i had nuisance tripping problem

 

[securespark]

considering the diversity, I found that the load (which without diversity would be 22.17A), is 21.65A, the wire is 4mm2.

Isn't the formula for diversity: first 10A of fl + 30% of remainder + 5A for socket outlet?

In your case, this would equal 18.65A inc allowance for a socket outlet.

If your CU allows it, fit a 25A breaker..

 

[Albert]

either is probablly ok

diversity guidelines are just guidelines

personally i probably wouln't bother swapping it unless i had nuisance tripping problem

I know but as you will see below a silly error in adding the figures made it to look like the values are on the limit, it looked so near it could go both ways, that is why I asked you, the more experienced sparkies, to know what would you do.

Isn't the formula for diversity: first 10A of fl + 30% of remainder + 5A for socket outlet? In your case, this would equal 18.65A inc allowance for a socket outlet.

5100(W)/230(V)=22.17A
12.17(A)x30%=3.65(A)+10(A)+5(A)=18.65(A)

Yes I see, I used the diversity correctly but fail with the arithmetics...
I don't think that this is a valid question any more, it is clear to me that it can stay as is, (nothing else is going to be added to the load on this circuit, and there is no neusence tripping )...Sorry for that.
Albert

 

[securespark]

Just wanted to get diversity formula sorted out.....