The times I've used heat cable I found it to be too variable along the length to feel it was a good option.

I still use heat tape, in conjuction with other heat sources.

I have implemented using ultratherm heat mats where they can be used, since they have a lower max temp.

I'd be interested to see a break down of heat tape related incidents, and how frequently the heat tape was used properly.

I cringe any time I see it used where tubs ride directly on top of the heat tape.
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Reptiles Make The World Go Round.