opposite lock

iTrader: (3)

Hi my next door neighbour is after advice about her heater for her outdoor pool.
Its a 5kilowatt unit , whats the best/safest way to power it? will it be fine just plugged into mains or should she have it rigged into the mains via its own fuse board etc....
forgive me if this is a daft question , wot i know on electrics i could write on a pin head.
any replys much appreciated ,mike

markyrst

5kw will be pullin about 22 amps so if its pluged into a 13 amp socket it will blow immediatley. its gona need probably a 32 amp 4mm supply on a 30mA rcd

opposite lock

iTrader: (3)

thanks pal thts great

dreamer

Will that be goin constantly?

Might justify a 3 phase connection in the long run depending on what way it works out

Contact a pool specialist deffo

markyrst

3 phase will cost a fortune to get put in, couldnt be justified in a domestic situation

KSA-Cossie

iTrader: (4)

As above depending on cable run.

daveselwood

you need to work out the volt drop for the cable distance,how many amps does it run,how many meters away from fuse box and it will definatly need an rcd,,in,the 17edition wiring regs there is a section devoted to swimming pools,post up the amps and distance in meters and ill work it out for you

Shandy-Ade

I had this problem when i wanted a 9kw heater, tell her to buy a 3kw heater then it can be plugged into a normal plug depending how far the cable run is

opposite lock

iTrader: (3)

ok m8 thanks i,ll speak to neighbour right away ,

opposite lock

iTrader: (3)

hi, 20m from house fuse box
rated voltage 220-240
rated power 5000 watts
frequeny 50 hz
cant see how many amps it runs !!!

daveselwood

5000 divide 230=22amps,you can get away with 2.5mm,but id use 4 mm with a 30 milliamp rcd protecting it and a 25amp mcb.if in doubt get an approved sparky in to do the job as swimming pools are like bathrooms and have zones that you have to use certain types of ip rated equipment in

danneth

which make boards do you use ive never seen a 25a mcb personally ???

daveselwood

meant 25amp rcd

cozzy940

i wouldnt put 4mm on 32 a supply , 6mm supply on 32a will be fine

opposite lock

iTrader: (3)

thanks for tht i,ll let her know , just for the record roughly how much should this roughly be costing to install proffesionaly? sounds like a nice setup tho!!!!

Cragrat

iTrader: (4)

job will have to be done by a part p registered sparky as not only is it a notifiable job its government legislation it be done by one

end of

rstdave

iTrader: (3)

6mm swa fed via 32a mcb/30ma rcd feeding a 32a rotary switch should do the job, ideally double poled isolation back at the fuse board end.

opposite lock

iTrader: (3)

thanks everyone for ur views and info on this , i,ll pass it all on and leave it their hands.!!!! its one for the pro,s so its nice she,s now got a got idea it whats involved.

job done

any ideas on cost of this setup ? roughly . sounds like quite few hours job to me

focusv8

You don't get out much then;

http://www.voltimum.co.uk/catalog/pr...lin-Gerin.html

.

rstdave

iTrader: (3)

25a mcb's aren't commonplace to use/be seen in a domestic fuse board though are they, think that's what the guy was getting at.

opposite lock

iTrader: (3)

i did say to her surely it should run seperately . we just measured the length the wiring will be from her fuse board in garage.
So exactly at what point to you live the system? forgive me but i dont have a clue lol sorry guys!

Cragrat

iTrader: (4)

to do right yes it wont be cheap but unfortunately there are lot of lads about will do it cheap-but you know what you will get in the long run if they go down that route

really annoys me at the moment that the layman knows nowt about part-p but all about what was corgi (but thats another argument)

without seeing i wouldnt imagine they`ll get much change from Ł500-Ł600

that is site unseen tho

danneth

i get out quite often thanks, just never seen one hence the question

opposite lock

iTrader: (3)

yep i agree abt the corgi thing. You would think there would a 'corgi' for you sparkies hence next door tryin to heat god knows how many gallons of water. Its 18ft by 10 or 12 ft ,4ft deep. how many litres/gallons there lol. perhaps thts for a different thread lol but once again thanks

rstdave

iTrader: (3)

Run directly from the fuse board on its own circuit yes. Would be live coming out the fuseboard then i would suggest putting an isolator at the swimming pool (a switch to turn it off) for ease of use.

opposite lock

iTrader: (3)

i see.....yes the switch is a good idea

daveselwood

why 4mm takes 37 amps when buried