What type of electrical plug is this?

[vtcnc]

Black goes to the straight terminal. White goes to the round terminal, upper left. Ground is where you would expect it. This doesn't follow normal 120V plug convention where the brass terminal is hot. What gives? This feeds a blower motor I picked up on CL for $5 and was planning on upgrading my welding ventilation but now I'm about to wire this backwards?

 

[hman]

Very strange looking plug! The split/gap next to the "unusual" round pin almost looks like the plug was "customized" by a previous owner. My guess is that they really didn't want anything else plugged into whatever machine your blower was part of!

 

[Winegrower]

That's just wrong. But it put up a good fight, and you lost some blood.

 

[Flyinfool]

That almost looks like some sort of custom plug made to plug into some other part of a machine. It is not uncommon for a manufacturer to do this to make it difficult to use non OEM parts with their system. I have worked for a few that did this.
It is also used where there is some reason they do NOT want this plugged into a wall socket, like weird voltage or the switch and/or fuse is in a different part of the machine or maybe even DC power.

I would double check that the blower motor is really the voltage you think it is and then cut the plug off and rewire correctly for your power and switch.

 

[Reddinr]

Do you know the voltage of the blower? If so, I would suggest that you cut off the plug and put on a Nema plug that is compatible with the voltage. That is an odd plug, probably on purpose as others have suggested above.

 

[Superburban]

I have seen similar if not the same (been a long time), used for two speed motors.

 

[vtcnc]

FASCO motor. 115V, 60hz, 4A. Wiring diagram says white=line, black=line, green=ground.

I’ve already cut it off. The problem is that odd plug is currently wired for neutral-IF you assumed it was wired to conventional wiring standards.

I’m not an electrical guy so forgive my naïveté- but does this reverse polarity or something?


Sent from my iPhone using Tapatalk

 

[Larry$]

The problem is that odd plug is currently wired for neutral

That's not a problem as all 115V AC motors use neutral as the return line. Put a NEMA cord cap on it and test. Bet it's fine. Like others have said probably done as part of another machine.

 

[JimDawson]

That doesn't match any standard pin configuration that I can find. But it might fit into a type ''O'' IEC receptacle. Must be a special.

 

[Flyinfool]

When you wire it back up the hot goes thru the switch and the neutral can go direct and of course ground goes to ground.