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  • Users: mpullin
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  1. mpullin

    Code: 480 V versus 575 V

    I am doing a new installation of some switchgear. Our current standard voltage at my facility is 575 V 3 Phase. The design for the motor controls is to have a breaker and not a fused disconnect. I was told that this is against code. My source said that this application is OK for 480 but not...
  2. mpullin

    air flow calculations

    I am trying to figure out how much air flow is going through a square duct. I have airfoils in line and measuring differential pressure across them. I have the range of the transmitter but don't know how many inches of differential is equivilant to lbs/hr. I have tried to find venturi...
  3. mpullin

    Controls on Combination Bark/Gas Boilers

    I have a controls issue with a bark and gas fired boiler. I new at this so I need a little help. Our operators are running the boiler with bark air wide open at all times. I was given the assignment to redesign that system. I've trying to find control schemes on the web and have not had any...

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