C-H,
You are quite right regarding breaker loop values.
Table 41B2 of BS 7671 gives maximum loop values for Type B,C & D MCB's to BSEN 60898.
It states the values given comply with the 0.4s & 5s disconnection time.
400volt,
I have some excellent course notes illustrating cable selection procedures for compliance with BS 7671. They show calculations required for volt drop, shock protection, thermal constraints, application of correction factors (de-rating) etc.
I can't post them here as they are copyright of the training organisation & run to a few pages.
If you wish to e-mail me (contact PaulUK for my e-mail address), I will be pleased to scan the relevant section & send it to you.
[This message has been edited by David UK (edited 06-15-2003).]
