[Gllug] OT: Mains electricity colour coding.

Chris Bell chrisbell at chrisbell.org.uk
Tue Oct 26 10:44:56 UTC 2010


On Tue 26 Oct, James Courtier-Dutton wrote:

> In the UK, certain faults cause the central fuse box to click off, but
> it can be any device on the ring main that caused it, making location
> of the fault more difficult.
> 
   I assume you mean the Residual Current Circuit Breaker RCCB, otherwise
known as the Earth Leakage Circuit Breaker ELCB, which trips if the total
sum of live and neutral return current exceeds a very low maximum value.
This could be due to a number of faults, but the tripping current is set to
about the value that the human body can survive during accidental contact.
Electricity is dangerous in that it can kill directly and it can also cause
fires through faulty wiring and connections.

-- 
Chris Bell www.chrisbell.org.uk (was www.overview.demon.co.uk)
Microsoft sells you Windows ... Linux gives you the whole house.

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