HOLT Electricians Practice Exam

For air-conditioning motors using a cord-and-plug connection, the likely maximum amperage prescribed is?

1. 10 amperes

2. 15 amperes

3. 20 amperes

4. 30 amperes

The correct answer is: 15 amperes

The maximum amperage prescribed for air-conditioning motors using a cord-and-plug connection is typically set at 15 amperes. This limit is established to ensure safety and compliance with the National Electrical Code (NEC) and industry standards. Air-conditioning units often require a specific amperage rating to operate efficiently without risk of overheating or causing electrical hazards. A 15-ampere rating is common for smaller to medium air-conditioning units as it balances sufficient power delivery with safety considerations. Motors exceeding this amperage would generally necessitate hardwiring rather than a plug connection, as higher current levels can necessitate more robust wiring and protection to prevent circuit overload. In practical applications, choosing a connection that exceeds this limit could lead to increased risks of tripping circuit breakers, overheating the plug or outlet, and ultimately compromising both the equipment and safety of the installation area. Thus, a 15-ampere maximum is a standard that balances the operational requirements of air-conditioning motors with the safety of electrical connections in residential and small commercial settings.