Low-wattage space heater

Jan 12, 2025 Last reply: 1 year ago 36 Replies

Or this one, where they make a point of emphasising the quality:

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Plenty of heating cables available for keeping pipes from freezing or reptiles from getting too cold

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Or two in series. A lot less power, and they will last very long...

And if it's a quick fix just for now: a candle, even a 7-day memorial candle?

Thomas Prufer

Vast price difference in pricing between Chinese and European suppliers. How can such a product be available in 5m interval lengths?

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You wrote "socket", not "lighting socket". That's the second time you've misquoted yourself.

Stop digging. Start thinking.

Try one of these, it has a minimum 5degC thermostat setting:

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A standard bayonet fitting would be more useful, as you're more likely to find an incandescent lamp with that fitting lying around.

How would plugging an incandescent lamp into a light socket be bad?

"made of material, and practical"

That's good to know

Metal light fitting and property built during or before the 1950's without a CPC, and no RCD ?

I didn't misquote myself, dumbo. I merely made what I said slightly more explicit since you clearly hadn't grasped what sort of socket I was referring to. Which should have been obvious - how many people have an empty light socket in a porch in case they want to plug the iron in, eh?

And don't go pretending you thought I might have meant lighting socket originally - unless you are the sort of person to plug a heater into a lighting socket.

Search me. Ask Mr. Able, it's his idea to do so, not mine. I'm looking for a heater, which, natch, plugs into a wall socket.

Don't rise to his trolling, Max. The more he posts, the more he shows his verbal impotence.

If the heating is done by resistors (resistance wires) in parallel, then there can be as many as you require. Assume every cm there is a 230kohm resistor across the live and neutral. Every cm will therefore provide

0.23W heat - or 23W per metre (or 115W/5m). Just keep adding lengths until you get the desired wattage.

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Is that how they work?

One of the e-bay adverts proudly mentions the use of copper wire!

So parallel conductors set in a marginally conductive matrix?

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It took some time to find, but from

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:"Freeze protection cable (FPC-SR) consists of a self-regulating parallel circuit of a semi-conductive heating core extruded over plated copper bus wires."

And from

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:"Self-limiting heating cables are designed with a temperature-dependent resistant element between two parallel copper bus wires. When the bus wires are connected to the mains, a current goes through the temperature-dependent resistant element which will then heat. As the element is heated, the resistance value rises causing the current to decline and heating is reduced. This explains the self-limiting effect.​​"

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