Cable sizing

[LewisB08]

Good evening,

Trying to get my head around cable sizing so need some help, so I've based my scenario on a workshop at my place of work, there is a 6 way board going up but obviously at the minute it is empty so how would you be able to come up with Ib?

 

[Pete999]

Find out what type and size of circuits that are being installed, apply the diversity calcs and bingo say 2 RFCs 2 Radials 4 Lighting and a couple of dedicated machines.

 

[LewisB08]

The circuits being installed are 3 x 32a ring mains and 2 x 10a lighting circuits. In the event of not knowing what circuits were being installed what would you do?

 

[davesparks]

The circuits being installed are 3 x 32a ring mains and 2 x 10a lighting circuits. In the event of not knowing what circuits were being installed what would you do?

I would find out what is going to be installed, without that information you cannot know what size circuit is required or what DB is required.

 

[LewisB08]

Ok thanks. Right so I have calculated a diversity of 200. What do I do with that now? By totalling the load a 100a main switch is suitable.