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Old Yesterday, 07:41 PM   #21
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Originally Posted by EJPHI View Post
I checked with some of the guys today and we will have 480 delta feed in most instances. We also have some 208 corner grounded delta UPS that will have to play well with the 480. This should be fun.

Inside the equipment we use all black wire with L1, L2, L3 labels which may have to be rethought so we can easily know which wires have 480 on them.
What is this equipment? 480V delta is fairly rare any more. Just because it is only fed with 3 wires from a switchboard or panelboard, doesn't mean it is a delta source. the ONLY criteria is at the service transformer secondary. Most utilities will no longer give you a delta secondary unless you can prove that you need it for some reason. They are going to give you a 480Y277 secondary. Whether you use the Neutral or not is your own business, but it's still Wye.
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Old Yesterday, 07:41 PM   #22
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I was trying to remember the Panduit one, they had it on display at the supply house. Not expensive, it would pay for itself in no time.

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Do you mean something that you permanently install on the equipment to indicate that live voltage is present?


Grace Voltage Vision


Panduit Verisafe
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Old Yesterday, 07:54 PM   #23
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I was trying to remember the Panduit one, they had it on display at the supply house. Not expensive, it would pay for itself in no time.
The Grace version was first, but I liked the Panduit one better when I saw it because it was optically isolated, meaning no 480V brought to the front door of the enclosure. I see now though that Grace has done that too. The power of competition...
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Old Yesterday, 10:36 PM   #24
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Do you mean something that you permanently install on the equipment to indicate that live voltage is present?


Grace Voltage Vision


Panduit Verisafe
Yes, otherwise we have a LOTO safety concern about even seeing if the 480 is present or not.
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