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electrode

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Posts posted by electrode

  1. What BMWNUT said. Make sure you separate the ground (green) from the Neutral (white) in the garage panel and install a ground rod with a #4 copper wire to the ground block in the panel. I would use a breaker to feed the garage instead of the power block though.

    good luck.

  2. The installation that you describe would not be safe. In the installation that you describe, the ground bus is connected to a ground rod, but not to the electrical system neutral. This means that you don't have 'an effective fault current path'. A ground fault probably wouldn't trip the breaker, and would instead simply energize the ground rod (and all metal connected to the ground bus).

    Since you are not permitted to bond to the neutral in more than one location (under current code), you must have separate equipment grounding and neutral conductors. under previous versions of the code you were permitted to use the neutral as the effective ground fault path for certain detached structures.

  3. The circuit feeding the garage panel is considered a "feeder" and not a "branch" and must have a ground wire to the panel. Also a ground rod at the garage which you have.

    NEC. 250.32 requires separate structures supplied by feeders to have a grounding electrode conductor.

  4. So what are you going to do with the feeder to the panel in the garage? First you must bring the wires into the panel. Since you installed conduit, pull a ground to the garage panel. if I were you i would consider using a 100 amp breaker in the main house panel to feed the garage panel and trim the wires to fit. I think the biggest breaker you can buy for the house panel is a 100 amp. you will likely exceed the bussbar rating of the main panel if you go bigger than 100 amp.

    Please properly ground your main panel as stated before.

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