Thanks for the input. The unit ran all night with no "smoke test". Just for giggles I cleaned up the caps on all three fuses and measured the resistances. Phase 1 and 3 fuses were .1 ohm. The phase 2 fuse despite its outward appearance was still conductive. It however showed an internal resistance of 69.9 ohms. The heat strip is is a 10Kw unit. Wouldn't the fuse impedance/resistance need to be much higher to have the effect indicated? Suppply voltage is 480 3phase (277/Leg).
