Shower Circuit Generalisations

[securespark]

Calling all qualified sparks!

I am wondering if it is possible to make a rule of thumb concerning shower circuits.

Could you look at a given circuit, assume that some of the cable run will be in thermal insulation, and apply any other correction factors that you can reasonably assume will be needed and by factoring in the cable size and length of run, work out whether the circuit is safe or not?

Eg, if you have a 15m run of 6mm T & E on a 40A B type, can it safely supply a 9.5?

 

[baldelectrician]

generally I use the rule > 7kw means 10mm,

I use 10mm for ALL new shower circuits greater than 7.5kW

 

[NuttallsSpark]

I go by the guidance notes onsite guide and BS EN 7671 they all say install 10mm for showers nothing less!

Sick and tired of hearin plumbers say 6mm for a run less that 16M

Ive also asked a NICEIC inspector and he agreed with me on 10MM

 

[securespark]

Thanks, folks.

I'm actually talking more about existing showers - checking by rule of thumb if they are installed OK, rather than new installs.

BTW the lime green IEE guide mentions 6mm2 for the smaller showers in its tables on P45+.

 

[NuttallsSpark]

BTW the lime green IEE guide mentions 6mm2 for the smaller showers in its tables on P45+.

Only use the Brown editions of the Regs and OSG and GN3

 

[ban-all-sheds]

My GN3 is definitely orange.

 

[NuttallsSpark]

My GN3 is definitely orange.

Really!!! mine is orange too but Brown circle with the 3 inside it

 

[ban-all-sheds]

Ah - the ever important circle.

Mine's a sort of blue-grey colour, but I have applied most of the updates from the IEE website. Real cut & paste!

 

[NuttallsSpark]

I did that with my blue regs when the new 2004 amendment came into effect, but got tired and went and bought the new brown edition lol

 

[ban-all-sheds]

Regs is too much of a pain. Ancillary GNs I can live with. Still haven't been *rsed to do my blue OSG.

 

[securespark]

This one!!

http://www.amazon.co.uk/exec/obidos/ASIN/086341463X/202-3806649-8632601