How to Build a Practice Electrical Circuit

Materials Needed for Each Circuit

• Primary wire in red, black and a third color to use for control circuit from switch. 20 Gauge wire is recommended. 18 Gauge may be used, but it is more difficult to insert into small switch and LED terminals to wire them. For each circuit, about 12 inches of red wire, 6 to 8 inches of black wire and 6 to 8 inches of a third color wire are needed, if a prewired LED is used. If not, about 18 inches of red wire and 12 to 16 inches of black wire are needed, to allow extra for wiring the LED. Read more