Red Seal Construction Electrician

Answer - B - For HVAC controls, you should use Shielded AWG 14 with 2 or more twisted conductor wires.

Key Takeaway: HVAC systems have two levels of wiring: line voltage and low voltage. Line voltage wiring supplies power to the components of the HVAC system. Low voltage wiring for an HVAC system includes the thermostats, zone controls, any relay or control modules, and the control wiring for the system. Wiring installed for the HVAC control links should be a shielded wire with conductors of not less than AWG 14, more specifically Shielded AWG 14 with 2 or more twisted conductor wires.