They sell heating cables of various lengths to attach to a metal pipe
to prevent freezing. If a heat cable is 6ft long and rated at 40
watts, how hot does the cable feel to the hand if the cable was not
attached to a pipe? IOW, could they be used to keep other things warm
than just a pipe?
If you expect an answer you need to actually ask a question that
has an answer.
This is not difficult to determine for yourself.
Take a 40W light incandescent bulb.
Grab it tight and hold on. Turn it on.
You'll have your answer in less time than it takes
to call the burn unit for advice.
There are many kinds of heating tape. Some with thermostats , some that are
self regulating for temperature, and some that are rated for so many watts
What does warm mean ? It could be just above freezing all the way to just
off the cook stove warm.
That's why I asked about the pipe style heating cable. Picture wise
it looks like 10/2 romex electrical wire rather than tape. There is
tape that is wound around a pipe and there is cable that is attached
parallel to the pipe. But I'm wondering how much heat reaches the
cable surface before it's transferred to the pipe.
> They sell heating cables of various lengths to attach to a metal pipe
If you're wanting to keep other things warm, just buy a battery blanket
(for keeping a car's battery warm in winter). To control the amount of
heat, make up a simple cord with the dimmer switch for an incandescent
light spliced into that cord. Plug the cord with the dimmer switch in
it into an outlet, and plug the battery blanket into the cord with the
dimmer switch. That way you can control the amount of heat with the
I've made my own beer for well over 25 years. Where I live, it can get
chilly enough indoors (in the winter) that it can be hard to get proper
fermentation. I have a variety of "mullion heaters" for refrigerators
that I use to warm up the primary fermenter to get the beer fermenting.
Some mullion heaters are only 15 watts, and I can just plug them in to
an electrical outlet and they produce enough heat for what I need.
Other mullion heaters are 45 watts, and they'll get too hot, and stop
the fermentation. So, for the 45 watt mullion heaters, I simply mount a
dimmer switch for an incandescent light in an electrical box, and splice
that electrical box into a cord between male and female cord ends. That
way, I can simply plug a night light into the female cord end to see if
the dimmer switch is passing electricity or not (cuz you push the dimmer
switch dial it to turn it off). If it is, then I just adjust the dial
to a midway setting, and plug the mullion heater into the female cord
end instead of the night light.
Since mullion heaters were used to warm various parts of fridges to keep
frost from forming in those areas, and nowadays they use the condensor
coil tubing to provide the heat, mullion heaters are no longer widely
available in appliance parts stores. By, you can use a battery blanket
for a car instead, and it should work equally well.
Hope this helps.
There are lots of different technologies though.
Some have a simple resistance wire.
Some have two wires and the heater is between them and continuous.
They can be cut to the required length.
Some need a thermostat and some don't.
You need to get read up on the manufacturers info.
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