Quick installation check?

[-Matt]

Hi guys, just want a quick sanity check on an installation.

a chap wants 3, 3Kw heaters wired with a programmable thermostat to control all 3 heaters.

my thoughts are:

40A supply to a Contactor ( L-1, N-3)

heaters connected to the contactor ( L-2, N-4)

then a Perm live to the thermostat common, return to Contactor A1, and a neutral to A2.

this should work should it not? Or is there a better way.

cheers

 

[Sintra]

I would be more inclined to use 3 x 16A radials broken through separate contractors with the control circuit linked across the coils.

 

[telectrix]

deleted

 

[davesparks]

Sanity check? There ain't much sanity in your plan. Do I detect a hint of fishing for us to do your design for you as you're out of your depth on a job?

 

[IrishSpark]

Do I detect a hint of fishing for us to do your design for you as you're out of your depth on a job?

As subtle as a car-bomb!

 

[davesparks]

As subtle as a car-bomb!

Guilty as charged

 

[IrishSpark]

Put myself across wrong there, I meant the op was being not so subtle!

 

[telectrix]

sublety is not a part of 2365.

 

[LankyWill]

i like sintra's idea

 

[uksparks]

I would also have three radials via three contactors joined as Sinatra states.

 

[benji]

why not 40a feed to 1 triple pole contactor then 3 feeds out to heaters ,but you would have to fuse down feed to stat

 

[davesparks]

why not 40a feed to 1 triple pole contactor then 3 feeds out to heaters ,but you would have to fuse down feed to stat

Basic common sense, a fault on one heater would stop all 3 working.

 

[HappyHippyDad]

I would also have three radials via three contactors joined as Sinatra states.

He disappeared a while ago UK

 

[telectrix]

or, run a 40A to a 4 pole contactor. then 3 x 16A radials, 1 from each pole. each heater on a 13A FCU to protect the 2.5mm from contactor to each heater.