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Hello,

The electrical mains at one of the facility that I'm looking at is rated at 225A, 3-phase, 120/240V. I couldn't find the plans for it, so I'm assuming it to be delta configuration, which then essentially allows 1-phase(neutral) 120V, 2-phase 240V, 1-phase(high leg-neutral) 280V, and 3-phase 240V.

I wanted to inquire if a load rated at 3-phase 208V could be served using the available 3-phase 240V? I understand if the service is 3-phase 208V and if the load is 3-phase 240V, it would cause overheating of the equipment, so would it be true the other way round?

Thank you.
 

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Hello,

The electrical mains at one of the facility that I'm looking at is rated at 225A, 3-phase, 120/240V. I couldn't find the plans for it, so I'm assuming it to be delta configuration, which then essentially allows 1-phase(neutral) 120V, 2-phase 240V, 1-phase(high leg-neutral) 280V, and 3-phase 240V.

I wanted to inquire if a load rated at 3-phase 208V could be served using the available 3-phase 240V? I understand if the service is 3-phase 208V and if the load is 3-phase 240V, it would cause overheating of the equipment, so would it be true the other way round?

Thank you.
Firstly, in my experience some utilities allow you to take single phase services from delta three phase services and some don't. The high leg is usually 208V not 280V. Contact AJHA / Utility if it's not clear.

As for your load, I would suggest contacting the manufacturer or consulting the nameplate of the equipment.
 
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