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  1. downtownfool

    What is better for a ground system - THW or THWN?

    All i find on the two is this: THW (5) 75¡C 167¡F 90¡C 194¡F DRY & WET LOCATIONS SPECIAL APPL. WITHIN ELECTRIC DISCHARGE LIGHTING EQUIPMENT LIMITED TO 1000 OPEN-CIRCUIT VOLTS OR LESS, (SIZE 14-8 ONLY AS PERMITTED IN SECTION 410-31). MOISTURE AND HEAT-RESISTANT THERMOPLASTIC THWN (5) 75¡C...
  2. downtownfool

    So, if I am going to install the fo

    So, if I am going to install the following: Three (3) single phase 480 to 240/120 25kVA transformers One (1) single phase 480 to 240/120 10kVA transformer One (1) 15 HP 480V 3PH motor What size "three phase transformer" will I need? Does this chart i put together look right for what I'm...
  3. downtownfool

    Silly and simple question for all the electrical gurus (I'm mechanical newbie)

    We have a single phase 480V to 240/120V transformer being fed from a Motor Control Center by two phases/legs (phase A and C)...if the only load on the transformer is 240V (say 40 Amps) do I then say that phase A has 40A and phase C has 40A? What if there is 120V load? Can this load be on only...

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