BS 1363 socket circuit

[KEV 1 N]

How’s the vicar doing his teas and coffees just now?

 

[Norah Nabino]

9.3kw

Was waiting for why. Basically there is 5 plug in appliances (totalling 9.3 KW including tea urns, coffee machines, fridge, 2x kettles which a vicar needs to be on simultaneously, once in a while. One circuit would be easier to run than two.

9.3KW

Does anyone know if its acceptable to have the ocpd of a radial circuit serving only single sockets higher than 32A ?

2 x 6mm would be the most a socket could take so probably 40A OCPD (singles in trunking).

With 9.3KW ,Ib=40.4a so In >=40a
It>=43a assuming ambient temperature is 35°c.
If you use reference method A (enclosed in conduit in an insulated wall) you are going to end up with a10mm cable which i think is expensive and difficult to terminate in a radial.
So i suggest you split the load into 2 radial circuits with Ib = 20a each wiring in 2.5mm.You can use 4mm as well with the same ref.method which is also expensive compared with the 2.5mm.

 

[haptism]

9.3kw

9.3KW

With 9.3KW ,Ib=40.4a so In >=40a
It>=43a assuming ambient temperature is 35°c.
If you use reference method A (enclosed in conduit in an insulated wall) you are going to end up with a10mm cable which i think is expensive and difficult to terminate in a radial.
So i suggest you split the load into 2 radial circuits with Ib = 20a each wiring in 2.5mm.You can use 4mm as well with the same ref.method which is also expensive compared with the 2.5mm.

Its singles in conduit run surface, 6mm singles can then handle 40A. Diversity of the appliances brings the Ib to less than 40A.