Craftsman Electrician study guide
Korean Electrician Control-Panel Layout — 400×420 Board and ±5mm Tolerance
Every part you met in L1–L8 (MCCB + fuse, EOCR, MC, 8-pin relay, timer, push-buttons, lamps, terminal blocks) now goes onto a single sheet of plywood — the control panel. But before any wire is drawn, where and how you place the parts is already graded. Get the positions wrong and you can be disqualified outright.
Board size & tolerance
- Board — 400 mm wide × 420 mm tall.
- Inside the board (parts on the plywood) — ±5 mm from the drawing. Eyeballed placement loses points sharply.
- Outside (conduit · boxes · cable · off-panel terminals) — looser, ±30 mm.
Four placement principles
- Left/right symmetry — heavy parts (MCCB · MC · EOCR) and their paired controls (PB / LAMP clusters) mirror around the centerline.
- Rows & columns align — same kind on the same row, same category in the same column. "Are the rows and columns aligned" is its own graded item.
- Terminal blocks at the edges — the incoming input block on the left edge, the outgoing output block on the right edge, so external conduit and cable exit cleanly through the side.
- Keep the wiring lanes — leave a horizontal channel between part rows and a 50 mm vertical margin down each side. These empty lanes are where the next step's wires run at right angles.
Next
Once the parts sit by the rules, the wires that join them have rules of their own — Wiring rules: max 2 wires per terminal, right-angle routing, route-via.
Try it yourself
Walk the control-panel layout in the Korean Electrician practical simulator →