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I am installing a 100 AMP temporary construction service panel. The utility requires it to be within 5 ft. of the transformer pad. The connectors run from the meter base into a 24" deep trench and then to within 24" of the pad. (a) What wire size do I need for 100A - the utility is being coy and says it is the responsibility of the electrician (me), but my research says #2 AWG (b) Do the cables need to run through conduit?

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  • Is your panel a box-on-a-stick(4x4 post), or a pedestal with a cable-chase built into it (like a RV pedestal)? Jul 23, 2021 at 23:12
  • Since it doesn't serve a residence, you'll need #1 aluminum. However if your main breaker is smaller, you may get away with smaller wire. Stay in aluminum. Jul 24, 2021 at 18:56
  • My panel is a 100 temp service panel on a 4x4 post. It has (2) 30A - 120V breakers and outlets and a 30A RV outlet. It is meant only for power for saws, lights, etc,. during construction. #2 AWG Aluminum seems to be the best choice.
    – AKG
    Jul 26, 2021 at 1:36

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