Step 1: Determine the unit starting demand load.
- Refer to the manufacturer's specifications or the unit's nameplate for the starting demand load, typically measured in amps.
Step 2: Calculate the circuit breaker rating.
- Multiply the unit starting demand load by a factor of 1.25.
- For example, if the unit starting demand load is 10 amps, the required circuit breaker rating would be 10 amps x 1.25 = 12.5 amps.
Step 3: Compare the circuit breaker rating with the actual breaker.
- Check the amp rating of the circuit breaker that currently protects the AC unit.
- If the circuit breaker's amp rating is equal to or greater than the calculated circuit breaker rating, the breaker matches the unit starting demand load.
- If the circuit breaker's amp rating is lower than the calculated circuit breaker rating, the breaker is undersized and may not be able to handle the unit's starting demand load, potentially leading to overheating, damage, or tripping of the circuit breaker.
Step 4: Consider the wiring.
- Check the wire gauge used for the circuit to ensure that it can safely carry the starting demand load of the AC unit.
Step 5: Consult with an electrician.
- If you have any doubts or concerns about the circuit breaker's ability to handle the starting demand load, consult with a licensed electrician for professional assessment and advice.
Remember that proper electrical installation and safety measures are crucial when working with electrical systems. Always follow electrical safety guidelines and local codes, and if you feel unsure about any aspect, seek guidance from a qualified electrician.
