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by maveric
Thu Jun 25, 2009 3:32 pm
Forum: Electrics Forum
Topic: maximum demand
Replies: 1
Views: 2391

maximum demand

Gents , For my exam i have to design the electrical installation in a house extension , upstairs is two bedrooms containing seven twin switched sockets to BS 1363 protected by BS EN 60898 type B mcb . How do i calculate the new assumed current demand of the installation if i do not know the current ...
by maveric
Fri Jan 23, 2009 8:12 pm
Forum: Electrics Forum
Topic: cable calcs
Replies: 18
Views: 8928

[quote="singer"]Having copy of BS 7671 is commendable but not knowing how to use it shows you have insufficient knowledge to be able to design, install, test, inspect & certify anything you are contemplating. Best to call in someone who can!!![/quote] At what point did i say i was goin...
by maveric
Wed Jan 21, 2009 5:15 pm
Forum: Electrics Forum
Topic: cable calcs
Replies: 18
Views: 8928

cable calcs

:? could anyone one tell me in easy to understand terms how to calculate the cable and breaker size , including cf's and volt drop, i have a copy of BS7671 IEE Wiring Regs but i am struggling to get my head around the long calculation to reach Zs, fault current and minimum csa of cpc .
by maveric
Wed Jan 21, 2009 5:06 pm
Forum: Electrics Forum
Topic: cable calculation
Replies: 2
Views: 2738

cable calculation

:? could anyone one tell me in easy to understand terms how to calculate the cable and breaker size , including cf's and volt drop, i have a copy of BS7671 IEE Wiring Regs but i am struggling to get my head around the long calculation to reach Zs, fault current and minimum csa of cpc .
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