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DIY Forum >> Electrical Questions >> Power a ceramic heat emitter on 12V?
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Message started by jimboDing on Aug 17th, 2009, 5:52pm

Title: Power a ceramic heat emitter on 12V?
Post by jimboDing on Aug 17th, 2009, 5:52pm
Hello guys, thanks in advance for your time & help. Situation is:

I have a 150W ceramic heat emitter that screws into a ceramic light bulb fixture. This means that it requires 120V, alternating current (AC), and 1.25 Amps (W = V x A).

Can I power this heat emitter from a switching power supply that provides a maximum of 20 Amps on 12V (240W) in direct current (DC)?

Basically, the wattage is supported, but the voltage and amperage are all different...  I've read that AC or DC should not matter for incandescent light bulbs. Can I assume the same for this heat emitter?

Thanks again!

Title: Re: Power a ceramic heat emitter on 12V?
Post by sparky415 on Aug 17th, 2009, 6:07pm
Am I reading this correctly?  :-/
You want to run a 120v lamp on a 12 v power supply?
This will not work
Are you in the States?
(Can you put a picture of the lamp on here as
I don't think I've ever seen one, some bathrooms used to have inferred
lamps fitted which always looked dodgy to me)

Title: Re: Power a ceramic heat emitter on 12V?
Post by CWatters on Aug 17th, 2009, 7:35pm

wrote on Aug 17th, 2009, 5:52pm:
Hello guys, thanks in advance for your time & help. Situation is:

I have a 150W ceramic heat emitter that screws into a ceramic light bulb fixture. This means that it requires 120V, alternating current (AC), and 1.25 Amps (W = V x A).


How did you arrive at 120V? Is it an american product or ?

If it's a UK product I would expect it to be designed for 230V and therefore draw around 650mA. (230V x 0.65A = 150W)


Quote:
Can I power this heat emitter from a switching power supply that provides a maximum of 20 Amps on 12V (240W) in direct current (DC)?


Possibly.

If the heater is a UK model needing 230V at 650mA then you need a mains inverter to convert 12V to 230V.  Maplin sell a 300W inverter which would do that...

http://www.maplin.co.uk/Module.aspx?ModuleNo=48723&C=SO&U=strat15

If the heater needs 120V then you need to find a 12 to 120V inverter. No idea where you get one of those but I haven't looked.

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