消防用水ポンプの配電回路は4芯ケーブルですか？
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消火栓ポンプの配電回路は4芯ケーブルですか？現場で見ていてくれる人はいませんか、助けてください
配電盤から水ポンプ制御盤へのケーブルは3+1ケーブルのみで済みます。水ポンプは380Vなので中性線は不要で、3本の線で三相の火線を接続し、もう1本の中性線を水ポンプモーターのケースの接地に使用します
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