OSG pg 160.Cooker circuits in household and similiar premises. 8.4

[lamb]

Would the cable withstand such current flow for such a period of time??

Yes, the cable would take roughly one hour at full load current to come up to maxiumum operating temperature (70 deg for PVC).

 

[Graeme Harrold]

Thanks for the replies guys.

With further reading I understand that diversity it to be used when calculating the overall demand for an entire installation and not used for working out cable sizes for individual circuits.

The load used by a domestic home as seen by the supplier would be lower than the sum of all appliances in the installation added together as all the appliances would not be in use at the same time. Diversity is used for this purpose.

Diversity can be applied to individual circuits. Is that not where this thread started..............

 

[entech]

Diversity can be applied to individual circuits. Is that not where this thread started..............

Yes diversity is applied for individual circuits when working out max demand as per bs7671.

 

[Sav]

Sorry to put a spanner in the works, but:
1500 /230 = 6.52 amps not 65amps !!

Am i missing something here ??
Sav

 

[Graeme Harrold]

Sorry to put a spanner in the works, but:
1500 /230 = 6.52 amps not 65amps !!

Am i missing something here ??
Sav

Sav, Yes a ZERO it was 15Kw = 15 x 1000 = 15000w not 1.5Kw

And for entech, diversity can be used to reduce cable sizes on individual circuits if you want

 

[Sav]

Sorry Graeme,
Read the opening post and then saw the calcs by not clever . Thats what threw me a bit !!

Sav