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Recent content by joymon

  1. joymon

    thread238-290829

    thread238-290829 Any thoughts on why the NFPA 70 495.70 mandates a solidly grounded 4W connection for Electrode type boilers higher than 1000V. Any thoughts on why the NFPA 70 forbids a 3W connection from an impedance grounded system; one would think at higher voltages the impedance grounding...
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