Which Is Common Wire. The first interior power wiring systems used conductors that were bare or covered with cloth, which were secured by staples to the framing of the building or on running. Why Nest thermostats don't typically need a C wire.
Wires come in many forms and are made from many materials. A normal switch or relay can be labeled common.while carrying current. SPLICES AND JOINTS The following are the Common Electrical Wire Splices and Joints Rat Tail or Pig Tail This kind of joint is commonly used to join two or more conductors inside.
The most common material for electrical wire is copper and aluminum.
I THINK the common is the black post on top. but I really don't know.
In electrical control wiring, the hot wire is mostly called the common. Can be confusing, but consider it the neutral/white in your house. It provides a return path so that the thermostat can be powered without disrupting the other wires which are used as electrical on/off switches for your equipment.