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  • Users: charlie10
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  1. charlie10

    How to size a UPS for 60 hp, 480 3 ph motor?

    Been asked to determine a budget cost to provide a UPS feed motor as listed above. Never sized a unit of this size before so not sure where to start. Any suggestions / thoughts would be nice.
  2. charlie10

    Can you change area classification based on activity

    We have a drum filling area that is C1D1 for 5' beyond the scale. The only reason that it is a C1D1 is that the filling operation is filling a 55 gallon drum through the bung opening and venting into the building. Once the drum is full, can we use a EE rated forklift to move the drum off the...
  3. charlie10

    Dyno Operation Control Problem

    Friend has a new Dyno unit (device that measures HP of auto). It has a 20 amp 220 volt main feed and a seperate 120 volt control unit feed. Unit works properly with a generator but not from the utility feed. This is at his house in the country so has a utility pole transformer with a 200 amp...

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