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Ask The Trades › DIY Forum › Electrical Questions › Immersion heater timer switch

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Immersion heater timer switch (Read 4993 times)

mwgary GDPR opt-out	Immersion heater timer switch Oct 21^st, 2012, 8:02pm I have immersion heater that is running off a 15amp circuit from the fuse box. The heater has a basic on/off switch, which i want to change to either a digital or mechanical timer, but I can only find ones that are 13amp. is it ok to use the 13amp timer on a 15amp cirtuit? all info much appreciated.
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Lectrician

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Re: Immersion heater timer switch
Reply #1 - Oct 22^nd, 2012, 7:05am

That's fine, the circuit in 15amp, but the load is only 12-12.5 amps.

This type leaes your current switch in place and is wired into the flex from switch to heater:

http://www.tlc-direct.co.uk/Products/SMTS900.html

I prefer this type, which replaces your current switch completely:

http://www.tlc-direct.co.uk/Main_Index/Timers_Index/Immersion_Heater_Timers_1/in...

« Last Edit: Oct 22^nd, 2012, 7:08am by Lectrician »

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CWatters Super Member Offline "Daddy fick it" says James Posts: 5150 Total Thanks: 58 For This Post: 0 Gender:	Re: Immersion heater timer switch Reply #2 - Oct 22^nd, 2012, 7:27am Using Electricity is quite an expensive way to heat your hot water. If you have any other source of heating it's likely to be a lot cheaper to use that. Sorry if you know that already.
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Re: Immersion heater timer switch
Reply #3 - Oct 24^th, 2012, 8:04pm

Hi
If you have to use electricity to heat your water then have your meter converted to Economy 7.
Then install a local to the HW cylinder a time clock that switches 'On' the water heater only in the periods of economy 7.... i.e. Typically. Summer 11:30 to 01:30 and then between 03:30 & 08:30. Winter 22:30 to 00:30 then 02:30 to O7:30. These time may vary depending on the supplier.

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