How many wires typically connect the outdoor unit to the indoor unit of a mini-split system?

How many wires typically connect the outdoor unit to the indoor unit of a mini-split system?

• A. Two plus a ground wire
• B. Three plus a ground wire
• C. Four plus a ground wire
• D. Five plus a ground wire

Answer: (B)

In a mini-split system, the outdoor unit typically connects to the indoor unit using a three-wire configuration along with a ground wire. The three wires usually consist of two for power (one for the line and the other for neutral) and one for communication between the indoor and outdoor units. This communication wire allows the systems to work in sync, providing proper operation of heating and cooling functions. The inclusion of a ground wire is important for safety, ensuring that any fault current has a designated path to the ground, which can help prevent electrical shocks or equipment damage. Therefore, the answer indicating three wires plus a ground wire accurately reflects the standard wiring configuration in many mini-split installations, ensuring both operational efficiency and safety.

In a mini-split system, the outdoor unit typically connects to the indoor unit using a three-wire configuration along with a ground wire. The three wires usually consist of two for power (one for the line and the other for neutral) and one for communication between the indoor and outdoor units. This communication wire allows the systems to work in sync, providing proper operation of heating and cooling functions.

The inclusion of a ground wire is important for safety, ensuring that any fault current has a designated path to the ground, which can help prevent electrical shocks or equipment damage. Therefore, the answer indicating three wires plus a ground wire accurately reflects the standard wiring configuration in many mini-split installations, ensuring both operational efficiency and safety.