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Seems as if he is listening to what i have said, he is now allowing me to diagnose and repair this unit. I believe the unit has a long history of trouble and was being reset every 2-3 days. I will check the elements,cables, and thyristor control, will also test heat build up within the unit...

perhaps i was wrong then to refuse the upgrade! I thought that the breaker was there to protect the conductors,elements,and controls, and signs of burning, be it through overload or heat from the elements should cause the breaker to trip, that being the breakers job. But surely putting a bigger...

Hi lads, thanks for the replys, the unit in question is a water,air, curtain.it has got overload protection,there is no start up current only demand current, with a thyristor control (variable) I applied diversity for the design of the unit being unsure if the label on the unit had taken this...

First i would like to say HI to you all, recently i was asked to remove a 16amp type D 3 ph breeaker in a heating unit,and replace this with a 20 amp breaker. I noticed that the cables to the heater elements were showing signs of overheating (black and brittle). i have refused to fit the new...