Conduit cable calcs....help please ?

[sythai]

Just calculating my In... conduit with singles run.

For the grouping factor - Cg it states number of circuits

If I have 2 circuits, but this consists of 18 x singles (e.g 1 x ring = 6 and 4 x radials)

Would this still be a factor = 0.75 ?

Thank you

Sy

 

[ackbarthestar]

You have 2 circuits?
The rfc I can understand but you now have 4 radials?
1/ Are these 4 radials connected to the same breaker?
2/ When calculating the grouping factor, why do you include the cpc ?
3/ Have you looked at the space factor rather than the grouping factor?

 

[sythai]

You have 2 circuits?
The rfc I can understand but you now have 4 radials?
1/ Are these 4 radials connected to the same breaker?
2/ When calculating the grouping factor, why do you include the cpc ?
3/ Have you looked at the space factor rather than the grouping factor?

1/ The 4 radials start as 32amp kitchen appliance ring and then go into 4 x FCU and its the load sides from here that are going down the conduit, so all on the same breaker.
2/ Never had to work out grouping factor before (about 15 years ago at college) just didn't realise that all, thats why I'm on here figuring it out
3/ Calculated space factor and it's just under - have only got a 2m run with one bend - 25mm tube

 

[ackbarthestar]

Ok, A circuit is regarded as cabling supplied from one source and protected by a single protective device.

Check 'Circuit' in part 2 in the big bad wolf's flower arranging manual