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From a one-line plan to a full wiring diagram (Japanese electrician exam rules)

How a Japanese electrician turns a one-line wiring plan into a full wiring diagram. The plan shows only where things sit; the full diagram draws every conductor: white neutral to the lamp and the socket W terminal, black live to the socket and switch, a red switch leg back to the lamp, and each joint marked as a crimp sleeve or a push-in connector, per the national exam rules.

How a Japanese electrician turns a one-line wiring plan into a full wiring diagram. The plan shows only where things sit; the full diagram draws every conductor: white neutral to the lamp and the socket W terminal, black live to the socket and switch, a red switch leg back to the lamp, and each joint marked as a crimp sleeve or a push-in connector, per the national exam rules.

This drawing comes from one YAML file. No shape was moved by hand.

Notes in the source (in Japanese)

単線図は「どこに何があるか」、複線図は「電線 1 本ずつ」。 描き直す手順そのものが、試験の中身。

決まり(電気技術者試験センターの施工条件、取得 2026-10-24)——電源からの接地側は白、電源から点滅器・コンセントまでの非接地側は黒。白をつなぐ端子は、コンセントの W・ランプレセプタクルの受金ねじ部・引掛シーリングの接地側。電源側の電線との接続はリングスリーブ、ほかは差込形コネクタ(問題ごとに変わる)。回路は架空。実際の試験問題の写しではない。

Source (YAML)

examples/gallery/405-単線図から複線図へ.zumen.yaml

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