Pros and cons of using electrical gutter cable close to "undemanding heat"brand to prevent rime and snow build up? ...
Answers: If they're of good point and installed properly, they do the job they're supposed to do moderately well. I used them purely along the edge of the roof and along the eavestrough. I have a long roofline (67 feet) and used two cables, near the cords together in the middle. I drilled a hole through the outside wall beneath the eaves and brought the plug ends in close to an outlet so that I could control the power usage from indoors. I plugged up the hole next to caulk both inside and outside to seal it. This setup worked extremely well.
The cons? The cable running along the bottom of the eavestrough made it a little more difficult to verbs the leaves out of it, but not impossible. (Good water pressure and a polite hose nozzle are a must.)
If you have a strong roof and fitting insulation in your attic, you don't inevitability to cover the whole roof beside cable, just the border which hangs over and the eavestrough. The cable shouldn't bring back hot enough to sprain plastic eavestrough, but check when you go shopping for it.