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[APD] Re: Substrate Heaters

Tom Graney writes:
>I bought a Dupla substrate heater and have a question:
>I expected the wires coming out of the transformer
>(and going into the tank) to be warm to the touch
>but they aren't. The transformer gets very warm but
>the wires seem to be at room temperature.

That is perfectly normal. The heating coils themselves are made from
special wire that gets hot when electricity flows through it. The wires
going from the coils to the transformer are regular wire that should not
heat up with normal loading. Just like a lamp cord should not get warm
when the lamp is on.

George Booth in Ft. Collins, CO (gbooth at frii dot com)
 The website for Aquatic Gardeners by Aquatic Gardeners
   http://aquaticconcepts.thekrib.com/  (mirror)

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