Sorry I've been away - computer troubles- and haven't been properly watching things here.
Roof de-icing cables do need GFI protection, but it's NOT what you think.
The usual GFI receptacles and breakers are not appropriate. Nor are AFCI breakers. You need a specific type listed for that specific use - and thse are set at 30mA (compared to 5mA for th3e usual ones).
Quite often, the fastest and cheapest way to get this is by also buying the controller from cable maker. Indeed, the controllers have this protection built in, as well as other features (like provision for a 'snow sensor").
