NEMA 5-20 to 6-15

[supratachophobia]

Similar to how the Tt-40 to 14-30 custom adapters work, could another adapter be made to go from 5-20 on the UMC to 6-15 on the recepticle?

The reason I ask is because I have access to jobsite temporary electric with a 6-15 connector on a 20 amp breaker.

If so, what would such a pin out look like.

 

[supratachophobia]

Edit: That should read TT-30 to 14-30.

 

[davewill]

Yes, you can. Wire the ground pins together and the two blades on the 6-15 to the blades on the 5-20. Polarity on the blades doesn't matter with 240v charging, as it does when wiring the 120v TT-30 plug. Doubtless you realize that a 6-15 shouldn't really be on a 20a breaker, however I've also seen such liberties taken. Keep a very close eye on the temperature of the 6-15 receptacle. Probably nobody has tried to pull 16a continuous from it. As long as the wire is big enough, the receptacle can probably handle it, though. Use a 5-20 "T" receptacle so that you can switch to your 5-15 adapter if you need to.

 

[TexasEV]

Why bother? Tesla makes a 6-15 connector for the UMC.

 

[MorrisonHiker]

Tesla does have a 6-15 adapter already. Might be faster to just stop by your friendly Service Center. ;-)

Why bother? Tesla makes a 6-15 connector for the UMC.

I believe he's trying to charge at 16 amps instead of the 12 amps that the 6-15 connector would allow since there's a 20 amp breaker.

 

[supratachophobia]

Tesla does have a 6-15 adapter already. Might be faster to just stop by your friendly Service Center. ;-)

I believe he's trying to charge at 16 amps instead of the 12 amps that the 6-15 connector would allow since there's a 20 amp breaker.

This is correct, I have the 6-15 adapter already (makes the collection complete). If possible, I'd like that extra 4 amps since that's another couple miles per hour of charge. I was concerned about the heat, so that is a good reminder from /u/davewill.

 

[robby]

Yes, you can. Wire the ground pins together and the two blades on the 6-15 to the blades on the 5-20. Polarity on the blades doesn't matter with 240v charging, as it does when wiring the 120v TT-30 plug. Doubtless you realize that a 6-15 shouldn't really be on a 20a breaker, however I've also seen such liberties taken. Keep a very close eye on the temperature of the 6-15 receptacle. Probably nobody has tried to pull 16a continuous from it. As long as the wire is big enough, the receptacle can probably handle it, though. Use a 5-20 "T" receptacle so that you can switch to your 5-15 adapter if you need to.

This will work... but for the love of anyone who comes after you, please label the 5-20 side of that adapter "240V! FOR TESLA CHARGING ONLY" so that no poor soul gets zapped by what is supposed to be a "neutral" pin.

 

[davewill]

This will work... but for the love of anyone who comes after you, please label the 5-20 side of that adapter "240V! FOR TESLA CHARGING ONLY" so that no poor soul gets zapped by what is supposed to be a "neutral" pin.

Or starts a fire or destroys some expensive piece of equipment by plugging it into 240v when it wasn't supposed to be. Quite so.

 

[supratachophobia]

This will work... but for the love of anyone who comes after you, please label the 5-20 side of that adapter "240V! FOR TESLA CHARGING ONLY" so that no poor soul gets zapped by what is supposed to be a "neutral" pin.

Where is the fun in that? 240v @ 15amps won't shouldn't might not kill you....