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Fan and light on a 2-gang switch

Bench build · Power, transformers and three-phase · Beginner · about 20 minutes

A ceiling light (9 W) and a fan (40 W), each on its own rocker of one 2-gang switch. A 2-gang switch is two switches on one plate. The line comes in once and is looped (jumpered) from COM of rocker 1 to COM of rocker 2; each rocker then feeds its own load, and both loads return on the shared neutral.

Fan and light on a 2-gang switch: the finished build running on the simulator's bench

Build it in the labGuided build, test sheet and fault finding, free in your browser.

Parts list

Test procedure

Each test has an expected value and a pass range, like a factory test sheet:

  1. Both rockers on: lamp + fan
  2. Rocker 1 only: just the light
  3. Rocker 2 only: just the fan
  4. Both off

How it works

What it does: A ceiling light (9 W) and a fan (40 W), each on its own rocker of one 2-gang switch.

Build it (guided or ready-made), then run its test procedure below. Every test has an expected value and a pass range, just like a factory test sheet.

Background

The jumper between the two commons is the most common thing to forget: everything on the second rocker stays dead.

More builds: power, transformers and three-phase