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Recent content by REDDOG

  1. REDDOG

    types of contactor

    NEMA or IEC rated contactors
  2. REDDOG

    Splicing old electrical feeder to new

    NFPA 70 is the NEC
  3. REDDOG

    industrial electrical engineer

    A Supervising Electrician or Master Electrician is that person that is licensed by the Authority Having Jurisdiction to pull permits to do electrical work. The examination for that position varies from municipality to municipality. Therefore the exam may be one hour to seven hours. The...
  4. REDDOG

    Motor terminal box bonding jumper

    How is the motor junction box connected to the motor frame?
  5. REDDOG

    Cutting Grounding Conductor on Pole Lines

    Why would one deliberately cut the grounding conductors on an aerial distribution system? I have observed this situation on several industrial aerial distribution systems. The grounding conductor is removed from the grounding electrode at or near the base of the pole. This conductor connected...
  6. REDDOG

    Cause of RFI during chiller compressor operation

    The conduits entering the transformers load side compartment appear to be steel. Is the required bonding from these conduits to ground missing?
  7. REDDOG

    explosion proof receptacle

    100 Amp FSQ Dead Front Interlocked Cl. I, Div. 1 and 2 Groups B,C,D Cl. II, Div. 1 and Groups F,G Cl. III NEMA 3,3R,4,4X,7BCD,9FG,12 Explosionproof NEMA 4 Watertight
  8. REDDOG

    explosion proof receptacle

    ENR Dead Front Interlocked 2P Circuit Breaking Receptacles ENP Plugs General Purpose ArkGard® 2; Factory Sealed Cl. I, Div. 1 & 2, Groups B†,C,D Cl. II, Div. 1 & 2, Groups F,G Cl. III NEMA 3,7BCD,9FG,12 Explosionproof Dust-Ignitionproof Raintight Wet Locations
  9. REDDOG

    UL 508A Disconnect

    What is the HP rating of this controller?
  10. REDDOG

    UL 508A Disconnect

    See UL 508A 28.5 Cord Connected quipment.
  11. REDDOG

    Transformer Secondary Conductor Sizing

    Doesn’t a 100 % rated over current devise have to be supplied with 75 degree C cable Ampacity not 90 degree C Ampacity. Overcurrent devises above 100 amperes are Listed for use with 75 degree C cable Ampacity. NEC 110.14(1) (b)
  12. REDDOG

    Feeder sizing in UL508 panel

    I thought that only listed thermal magnetic circuit breakers, could be used as a panel disconnect and over current protective devise. Magnetic only (MCP) are UL recognized devise and can used only with a listed starter combination that has been evaluated by UL. The 150 amp thermal magnetic...
  13. REDDOG

    conductor sizing question, NEC table 310.16 vs 310.17

    What is a type W cable?
  14. REDDOG

    Class 1 Div 1/2 enclosure question

    See NEC 500.8 Equipment
  15. REDDOG

    Class 1 Div 1/2 enclosure question

    Is the heater element UL Listed?
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