What happens when the cable is crossed against itself, is rubbing, which could lead to a short by rubbing through the insulation. The cable should run parallel to the water line pipe only. If the cable is a bit too long, it can be run back on the other side of the pipe. Make sure it does not touch.
The heat cables have a 1 year warranty and have a normal lifespan of 3-5 years.
Do you mean "lengths"? You cannot 'link' one cable to another. If you answered "Yes", then yes, they do come in different lengths.
Yes, you can use Foam Pipe insulation over the Heat Cable. It does not get hot enough to melt, only approx.90 degrees. However, we recommend using Fiberglass Pipe Wrap to overwrap the cable. It does a much better job distributing the heat along the pipe protecting it form freezing.
The light indicates power only. It illuminates the instant the cord is plugged in regardless of temperature.
Yes it is ok to use under foam. However, fiberglass would be a better option.
You’ll be able to see the out line of the cord where the snow/ice had melted
Yes you can do that
No, it will not work for this. The cable will not come on. It contains an automatic thermostat that senses temperature and does not have a manual setting.
The Frost King heat cable turns on at 38 degrees and turns off at 45 degrees