PUCampin wrote:
I am glad the owner is stepping up, this was a kludge on so many levels it isn't funny.
Previous poster mentioned all the visual clues, I'll add something else. The NEMA 10-30 dryer receptical, the one most commonly confused with the NEMA TT-30, has been against code since 1996. All undgrounded 220V have been against code for installation since 1996. So even if the electrician thought the owner was asking for 30A 220V, that should have been the very first clue. A proper 30A 220V is a 4 prong receptical!
This is very true, BUT! most people do not know the difference between the different plugs. I know that at my stick house I have a plug for the dryer and sorta resembles a 30 amp plug and it is 220 Volts.
I myself almost made that mistake once while visiting relatives in a farm and they said they had power that they believed to be 220 volts where their welding machine was plugged into and that I could have shore power to my coach. I went to check it out and I told them that I could not hook up into that receptacle. Everything was different about it. The prongs were different.
But an ordinary person that does not understand electricity could easily have made the mistake of getting an adapter to match the plug.
