The one I scrounged up a pic for is single gang, but 99% of the time the one’s I’ve seen are double-gang. They have a big isolation transformer mounted on the back. It was a precursor to GFCI technology. They have a current limit, and running a hair dryer off them will fry them. I would guess that any that might still exist in a private home have long since been replaced by a more convenient GFCI receptacle. Either “technology” is safe, be it the isolation transformer of the razor outlet or a modern GFCI. The GFCI, however, more closely matches the way people want to use their bathrooms now.
Thanks, I think it would be good idea to recommend replacement with GFI. But, how does this ‘razor only’ low volt transformer outlet prevent a shock hazard by being isolated from ground? I would think it would increase shock hazard if there is no ground.
These were installed in many homes from late 50’s to mid 70’s up here.
I always recommend “Replace with GFCI receptacle”. I found one where the homeowner went around the transformer and direct wired the 120V to the 2 blade receptacle!!! I assumed the transformer bunrt out and he had his own fix.
Mark, the isolation transformer consists of 2 coils insulated from each other. 120 volts from the household circuit running thru 1 coil produces 120 volts in the secondary coil. You could still shock yourself by touching both of the output terminals. :roll: But there is no electrical potential between one of the output terminals and ground, as there is with conventional wiring because it is a little isolated mini-circuit. Drop it in the tub, theoretically no shock!
As for the lack of ground, most razors and hair dryers are 2-prong devices anyways, no ground wire to the chassis, but the plastic body provides insulation.