50A Twist-Lock Plug 3P 4W 125/250VAC Application

[MNWildcat]

What would the use be for this type of twist lock recept? It's a non-NEMA style 50A/208V/3P/4W+G. It's in an outdoor park area at a city hall building.
Is it for shore power? But what entity would have the corresponding plug standard that they could use the non-NEMA receptacle?

50A Twist-Lock Plug 3P 4W 125/250VAC BK/WT

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[Krusscher]

Pretty sure our spider box at the college plugs into a recept like that. I'll check tomorrow, its too close to quitting time to walk out there lol.

 

[winnie]

There is no requirement to use NEMA receptacle configurations. They are simply very common.

There isn't even a requirement to use the NEMA receptacles in ways that match the voltage associated with a given configuration. (Though it would IMHO have to be a strange situation to justify not following the configuration. )

The 'California Style' connectors happen to be very common for 50A circuits.

Jon

 

[Joethemechanic]

What would the use be for this type of twist lock recept? It's a non-NEMA style 50A/208V/3P/4W+G. It's in an outdoor park area at a city hall building.
Is it for shore power? But what entity would have the corresponding plug standard that they could use the non-NEMA receptacle?

50A Twist-Lock Plug 3P 4W 125/250VAC BK/WT​

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View attachment 2567115​

Maybe they just chose something unusual to prevent someone from plugging in something unauthorized.

I've put twist locks on welders that have a 120v DC receptacle on them. Stops kids from plugging their electronics into them and letting the magic smoke out

 

[texie]

As noted, the pin is known as CS or California style. Very popular in the temporary power industry, particularly entertainment.