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  1. bob95678

    line voltage tolerances

    Thank you all very much for the information. It was just what I was looking for. This is a great site and I will keep in touch in case I can answer a question for someone in the future. Thanks again!
  2. bob95678

    line voltage tolerances

    Can someone tell me where to find a standard on the standard deviation of line voltage in North American systems. Is there a given tolerance for the utility that they must meet when they supply each different voltage. For instance, if the line voltage is 277/480 volt how low can the 277 be and...

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