Maximum KW for shower

[1john]

you cant. it was more of a suggestion that a pullcord could be safely used and sited in the bathroom, who wants a 'cooker' switch on their landing??
incidentally, i dont think i have ever come across anything 'domestic looking' in regards to a 45/50Amp DP switch that can be locked off, but i stand to be corrected.

 

[ColJack]

turn it off, then tie up the string out of reach...

 

[ban-all-sheds]

That might work..

Although a pull switch would be in the bathroom, 99.999% of the time, and so wouldn't be remote.

I agree with what 1john says - basically with strict adherence to the regs it's unlikely that you could get a switch outside to comply.

And if you deem that the switch is to allow mechanical maintenance, a pullswitch would have to be the type with a pop-out tab or a mechanical flag in a window etc. If you say it's an emergency switch then you'd better go looking for a red cord....

 

[wingcoax]

Come on BAS!, Cut it off at the top.

 

[ban-all-sheds]

Actually it's not unusual for cords to have a small plastic piece which allows you to replace the main lower section if it gets grubby/frayed, so you could temporarily remove it there.

Or have it in the bathroom where it won't be remote and won't need lock-off provision.

 

[kai]

Why can't an RCD (of the sort useable as main switches in consumer units) be employed as an isolator?
Surely if it can safely isolate an entire installation, it can safely one shower!

 

[ban-all-sheds]

OK, 2 questions:

1) Is an RCD designed to be used as an on-load isolator?

2) What kind of isolation are you proposing to use the RCD for?

 

[ColJack]

1) yes.. it's designed to operate under load otherwise what's the point of it?
2) in the airing cupboard for maintainence.. ( lock on cupboard door or in din rail box with lockable lid.. )

 

[ban-all-sheds]

1) yes.. it's designed to operate under load otherwise what's the point of it?

It is designed to be able to safely break the load.

That's not the same as it being designed to be used as an on-load isolator. What's its duty cycle, for example?

2) in the airing cupboard for maintainence.. ( lock on cupboard door or in din rail box with lockable lid.. )

That would be OK.

But under the stairs not necessarily so...

 

[ColJack]

probably about the same as the main isolator on the CU..
it's not being used every day as a light switch would be though is it? ( or are you one of these weird people that use the 45A pullcord to turn the shower on and off? )
isolation is not the same as switching either.. isolation is done off load..
some "isolators" are capable of switching full load ( or more for start up currents etc ) but the shower should be off anyway.

it all comes down to what you consider the 45A pullcord to be for..

as for having the switch under the stairs, if it's lockable or the door is then what's the difference?
if no lock then a well placed 4 inch screw into the floorboard will stop the kiddies opening the door and a word to the adults and a sign taped to the door and isolator should be enough ( if they ignore both then it's intentional and attempted murder.. )