Should SWA installed properly feel warm to the touch? I was tidying around the distribution board at work the other day, and could feel the heat being radiated from an SWA where it goes into an isolator. Then i touched it and it is rather warm. It is the main SWA from the meter (6-8 metres away) and it feeds into a big metal-handled isolator (the metal braid is exposed here) which is also quite warm. Should this happen?