What is the largest permitted breaker that can be installed in the panel for Motor 1?

To determine the largest permitted breaker for Motor 1, it's essential to consider the motor's full load current (FLC) and any applicable code requirements, such as those in the National Electrical Code (NEC). Generally, motors are protected by a circuit breaker sized according to their FLC, typically allowing for a maximum breaker size that is 125% of the motor's FLC for branch circuit protection.

If, for instance, the FLC of Motor 1 is known to be lower than the ratings of the breakers provided in the choices, then selecting a breaker that is 70 amps could be permissible, assuming that this rating does not exceed the 125% rule or any specific requirements for that motor.

In the context of the information given, if Motor 1 is rated appropriately for a 70 amp breaker while also conforming to the standards of safe operation and code compliance, this makes option A the correct answer. This choice reflects the upper limit on breaker sizing based on the motor's characteristics and ensures adequate protection without being excessively sized, which could result in insufficient overload protection.

The other options, while potentially valid depending on the specific motor rating, are lower than the maximum permitted size of 70 amps, making them less applicable in