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でんちゃん@電気工事

これを理解していない電気屋は素人。

Technical diagram divided into sections showing 3-phase 200V electrical setup with main switchboard, sub-distribution boards, breakers, wiring connections between components, symbols for power sources, loads, and safety devices like earth leakage breakers, including numbered terminals and explanatory labels in Japanese.

12:05 PM · Nov 5, 2025

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