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Star-Delta motors on plugs and sockets

Johno12345
Is there a convention when putting a 7 pin plug on a star-delta motor?

im going to specify it for a job, but am predicting the 'its pointless as the wiring isnt standardised'


Thanks
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    Correct me I am wrong, but I seem to recall from my days working in heavy industry that motors rated at more then 1/2 HP were not permitted to be on a plug and socket arrangement.

    Have things changed in that regard? It was something which the Factory Inspector raised at one of our monthly meetings, and as a consequence, we had to down-rate our conveyor motors to 1/2HP or under to comply.
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    Correct me I am wrong, but I seem to recall from my days working in heavy industry that motors rated at more then 1/2 HP were not permitted to be on a plug and socket arrangement.

    Have things changed in that regard? It was something which the Factory Inspector raised at one of our monthly meetings, and as a consequence, we had to down-rate our conveyor motors to 1/2HP or under to comply.
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