Using an air conditioner without a proper ground wire connection can pose potential safety hazards and is not recommended. The ground wire serves as an important safety feature in electrical systems, including air conditioners. It is designed to protect users from electric shocks and prevent electrical fires.
When an electrical fault or surge occurs, the ground wire provides a low-resistance path for excess electrical current to flow safely into the ground, rather than through the body of someone touching the appliance. Without a proper ground connection, if a fault occurs, the risk of electric shock greatly increases.
The duration for which an air conditioner can be used without any issues (in terms of safety) without a ground wire connection cannot be accurately determined. It's not a question of how long it can be used safely; rather, it's a question of when an electrical fault might occur. Electrical faults can happen unexpectedly due to various factors such as wear and tear, damage to the appliance or electrical wiring, power surges, or other external factors.
To ensure safety and comply with electrical codes and regulations, it is essential to have your air conditioner properly grounded. If your air conditioner lacks a ground wire or has a faulty ground connection, it is crucial to have it inspected by a qualified electrician and have the necessary repairs or upgrades done.
Never compromise on electrical safety, as it could lead to severe consequences. Always follow local electrical codes and safety guidelines to ensure the safe operation of electrical appliances, including air conditioners.