In building automation wiring, cables range from which gauge?

In building automation wiring, cables range from which gauge?

• A. 12 - 16 AWG
• B. 12 - 18 AWG
• C. 16 - 24 AWG
• D. 18 - 24 AWG

Answer: (D)

Low-voltage control circuits in building automation use small-diameter conductors because they carry only modest current over typical distances. That’s why the standard wire sizes for this work fall in the 18 to 24 AWG range. Thermostat-style control wires and many field devices operate at 24 V and are commonly run with 18–22 AWG, while signaling and data lines often use 22–24 AWG. When you need to carry more current or feed power over longer runs, you’d switch to thicker gauges like 12–16 AWG, but that isn’t typical for standard control wiring. So, the common range for building automation wiring is 18–24 AWG.

Low-voltage control circuits in building automation use small-diameter conductors because they carry only modest current over typical distances. That’s why the standard wire sizes for this work fall in the 18 to 24 AWG range. Thermostat-style control wires and many field devices operate at 24 V and are commonly run with 18–22 AWG, while signaling and data lines often use 22–24 AWG. When you need to carry more current or feed power over longer runs, you’d switch to thicker gauges like 12–16 AWG, but that isn’t typical for standard control wiring. So, the common range for building automation wiring is 18–24 AWG.