[Arran]

Ron;
  You would have to check the spec sheet but I believe that these are also fused, so they will fail open should they decide to short. That's one good thing about cheap electronic gadgets these days, many incorporate a capacitive dropper rather then using a transformer, or switcher power supply, which means big film caps are available. Now if the cardboard tube were big enough you could fit a motor run cap inside of it, in the case of a single section unit.
Regards
Arran