Fire Mouth: It So Happens It doesn't have a 3Prong plug, If You Had been Attending the thread conscientiously you'd not assume erroneously ., and he said the trany from japany is well grounded and supplies for agrounded 3P plug, it is simply a hot chassis assembly and I stated he can isolate it 100% from the circuits and supply with "stand offs" and other plastic isolating materials if that is desirable., Shock Proofing It !
The Fact that he got a harrowing Shock from it while testing it in his cement floor garage is noteworthy enough to take measures to make the Old For Sale Unit desirable of it's own volition irregardless of Supply.
Agreed: a Grounding conductor is always desirable and safest. Roy
From: w snipped-for-privacy@hotmail.com (w_tom) =A0=A0=A0=A0If a transformer is properly grounded as required by codes, then if the appliance has an internal short, that short will trip a circuit breaker.[ }:-oooh Not NEC ] Grounding transformer secondary is necessary for breaker to trip. Leakage across to a floating transformer secondary may put enough voltage on chassis to cause shocks - with or without an internal appliance problems. But transformer secondary must be safety grounded - as codes require. When grounded, further useful information (ie a tripping circuit breaker) would then tell us more, immediately eliminate any human safety threat, and cause humans on the scene to fix any existing problems. Even if the appliance does have an internal fault, that fault would not be fixed because a transformer secondary is not grounded. =A0=A0=A0=A0BTW, I have assumed the appliance has a three prong receptacle. I have mostly ignored a two prong receptacle because the problem could be more complex. First most, does the transformer have secondary properly safety grounded? "Roy Q.T." wrote: All those observations seem all for naught to me, since he as a Hot Chassis Item. It behooves whom ever get's to keep it to isolate the works 100% from that chassis with plastic or insulated offsets to avoid any objectionable current flowing through it as he's experienced., Or keep it as is and Fancy Oneself in those days. Point: No Manner of Transformer will correct the condition & a separate ground conductor will only disguise the fault. He should have plugged it in his safe insulated floored section, but then again it was all for the better :-) =AEoy