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  1. n1oty

    Upgrading my electrical feeds and controls

    Tables 4 and 5 of Chapter 9 cover the calculation of conduit fill percentage. I calculated the area of four #6 THHN conductors from Table 5 as being .2028 square inches (.0507 per conductor). Table 4 shows a total area of 1.986 square inches for 1.5 inch schedule 40 PVC and 1.711 square inches...
  2. n1oty

    Upgrading my electrical feeds and controls

    Jerry, I will have to break out my NEC to confirm, but I believe that the maximum conduit fill percentage at this ampacity and driving any inductive loads (think motors) is limited to around 35 percent or so. I'll check the NEC later today. John
  3. n1oty

    Upgrading my electrical feeds and controls

    SOOW in conduit would be a code violation in most areas. It is meant to be exposed to the air for cooling. THHN generally carries a higher temperature rating than SOOW, so it has the added benefit of supporting more amperage than typical SOOW for a given conductor size. For example, most THHN is...
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