Industrial round plugs (16 A/32 A)

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Regarding those big industrial round plugs, are 16 A plugs/outlets the same size as 32 A plugs/outlets (i.e. would it be possible to plug a 32 A machine into a 16 A socket or are they incompatible)?
 
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Different size, ISTR the 32A ones are larger than the 16A ones.
 
Also there are same ampage but different keyed plugs/sockets for special applications
 
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Each current rating is a different size. So if you need to interconnect different sizes you will need to make or an adapter.

Clearly when doing so you should consider whether the supply is adequate and whether overcurrent protection should be provided as part of your adapter.
 
Examples of each:

16_32_blue.jpg
 
Mustn't leave out big brother!

IMG_0068.JPG
 
Last edited:
Off-topic.....Currently working on a project with 3 phase + N + E blue c-form connectors.....didn't even know they existed prior to starting the project.

The project is in Japan, where mains supply is 200V three phase, either 50 or 60Hz depending on location.
 
Off-topic.....Currently working on a project with 3 phase + N + E blue c-form connectors.....didn't even know they existed prior to starting the project.
I suppose there is little/no need in UK/Europe - which I imagine is why all the 4-pin and 5-pin ones I've seen are red.
The project is in Japan, where mains supply is 200V three phase, either 50 or 60Hz depending on location.
Do you mean 200V phase-phase - i.e. about 115V phase-neutral?

Kind Regards, John
 
Do you mean 200V phase-phase - i.e. about 115V phase-neutral?

Kind Regards, John

I wondered about that. Domestic mains voltage in Japan is 100v. So I would expect 3 phase to be 173v phase to phase.
 
I suppose there is little/no need in UK/Europe - which I imagine is why all the 4-pin and 5-pin ones I've seen are red.
Do you mean 200V phase-phase - i.e. about 115V phase-neutral?

Kind Regards, John
Mennekes make (and sell in the UK) ALL the plugs and sockets you could ever want. There's a 5-pin blue, 5-pin yellow etc, even do a few 3 pin red.

Having said that, they quite clearly categorise the blue 5 pin as being for 230v. I have seen one red 7-pin and one blue 5-pin in use. They were essentially being used to pull in a contactor when the plug was inserted and drop the contactor out on removal. I guess as an extra safety step and also to limit what could be plugged into the outlets.
 
Having said that, they quite clearly categorise the blue 5 pin as being for 230v
At least from wikipedia there seems to be a bit of a gap in the standard for the 5 pin plugs. The yellow is for "57–75/100–130 V" and the blue is for "120–144/208–250 V AC", so there doesn't seem to be any correct plug for 100/173 .
 

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