Wiring a 10.5 KW shower run

[domestic spark]

If the ceiling is above 2.25m you are ok with a cord pull isolator, still site it sensibly though. If ceilings are lower then cord pull needs to be more than 60cm away from edge of shower tray/bath. If the room is really small it needs to go in the most sensible available place, remember BS7671 is non-statutory, but outside the room is also a possibility.

60cm rule only applies when shower has a fixed head !

 

[Octopus]

If the room is really that small and the ceiling is low I'd be looking at putting the isloation switch outside the room.

 

[SimpleSimon]

Thinking about it, in my en suite at home there isn't an isolator. The circuits are protected by an RCD though. Should there be one.

The amount of showers without an isolator switch I've seen is shocking.

 

[malcolmsanford]

60cm rule only applies when shower has a fixed head !

Not sure what you mean by that as 60cm for a fixed head, as it is the distance that zone 2 extends to from zone 1. Apart from the heights for zone 1 and 2 the only mention I can remember for a fixed head was for showers without a basin, and they don't have a zone 2 with them.

I maybe wrong about that as I don't have the BRB with me at the moment.

 

[telectrix]

at 10.5 kw, pull switches are notorious for burning out, and a pig to connect 10mm. i would be inclined to fit a wall switch outside the room.easier to fit, and outside all zones.

 

[Engineer54]

at 10.5 kw, pull switches are notorious for burning out, and a pig to connect 10mm. i would be inclined to fit a wall switch outside the room.easier to fit, and outside all zones.

As far as i can make out from the various posts i've read on this matter... Many Electricians only use ''Crabtree'' 50A pull switches on these higher rated Shower units that require 10mm T&E. According to them, 10mm cable is accommodated pretty easily... Plus they like the neon indicator being automatically disconnected when you drop the head unit....

 

[tony mc]

With a nice deep box for the cable !!!!

 

[tonys]

As far as i can make out from the various posts i've read on this matter... Many Electricians only use ''Crabtree'' 50A pull switches on these higher rated Shower units that require 10mm T&E. According to them, 10mm cable is accommodated pretty easily... Plus they like the neon indicator being automatically disconnected when you drop the head unit....

So I take it you would follow suit ?

 

[Engineer54]

I would certainly be checking them out, if i was in the position of installing such a circuit, ...So yes of course!!!!

 

[chiplard]

The 50A Crabtree pull switches are far superior to anything else I've fitted. They have 2 openings at the top which the ends of the cable push through, then you have plenty of space to terminate without worrying about tight bending radius or having to try and put the cover on with cables in the way.

Overall a well designed bit of kit.