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Recent content by ronmarx

  1. ronmarx

    24vdc digital signal cable length limit

    what is the longest practical cable length for a 24vdc digital(on/off)siganl ? I have a Piloteye 2000 flare monitor between 2500ft-3000ft away from control room and need to get digital(on/off) signal to control room. What problems might I encounter ?
  2. ronmarx

    480v warehouse lighting, use 3pole or 2 pole breakers

    new to 480v lighting. estimating warehose project w/(200)-250w, 480v highbay fixtures. what is the best method, fixtures divided across 3 phase(3 pole) breakers or 1 phase(2 pole)breakers?
  3. ronmarx

    SHUNT TRIP FOR SERVICE DISCONNECT

    NEED AN OUTDOOR SERVICE DISCONNECT FOR 1600A, 480V SERVICE WITH (6)-4" UNDERGROUND CONDUITS (25FT TOTAL LENGTH)FEEDING A MOTOR CONTROL CENTER JUST INSIDE BLDG FROM A 13.2KV/480V XFMR JUST OUTSIDE THE BLDG. SHORT OF A 1600A, 480V BREAKER OUTSIDE WOULD A SHUNT TRIP COIL ON THE MCC MAIN BREAKER AND...
  4. ronmarx

    MULTIPLE FAN MOTORS ON ONE CONTACTOR

    I HAVE A WAREHOUSE PROJECT WITH 20-5HP, 480V VENT FANS. SHORT OF BUYING 20 STARTERS, CAN I USE ONE STARTER FOR 5 FANS AND ROUTE A COMMON FEEDER TO A POWER DISTRIBUTION BOX WITH FUSE BLOCKS/TIME DELAY FUSES FOR EACH MOTOR ? COST IS A FACTOR FOR THIS INSTALLATION. LOOKING FOR IDEAS.

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