The electrical circuit for a 1.5-ton air conditioner (AC) typically requires a dedicated circuit with a specific ampere rating to handle the initial startup current, also known as inrush current or surge current. Here’s a general guideline for the ampere rating of the Miniature Circuit Breaker (MCB) or circuit breaker for a 1.5-ton AC unit:
How Much Ampere MCB Required For 1.5 Ton AC
- Starting Current (Inrush Current): The starting current for a 1.5-ton AC unit can be approximately 5 to 7 times the rated or running current. In general, a 1.5-ton AC unit may have a rated current (also known as full-load current) of around 10 to 12 amps. Therefore, the starting current can be around 50 to 84 amps.
- Selecting MCB Rating: To accommodate the inrush current, it’s advisable to choose an MCB with a rating higher than the maximum starting current of the AC unit. Typically, a 60-amp MCB is suitable for a 1.5-ton AC unit. This allows for a margin to handle the initial power surge when the AC compressor starts.
It’s important to consult with a qualified electrician or electrical engineer for precise sizing and installation of the circuit breaker. The electrician will consider factors such as the specific model and specifications of your AC unit, local electrical codes and regulations, and the capacity of your electrical panel when determining the appropriate MCB rating.
Additionally, the MCB should be dedicated solely to the AC unit to ensure proper protection and avoid overloading the circuit. Never overload a circuit with multiple high-power appliances, as this can lead to electrical hazards and damage to your electrical system.