What is the minimum size conductors permitted in the SJO cord used to connect a 1½ hp motor?

For connecting a 1½ hp motor using SJO cord, the minimum conductor size is determined by both the current rating of the motor and the specifications set forth by the National Electrical Code (NEC). Generally, a 1½ hp motor typically draws a current of around 10-15 amps depending on its efficiency and voltage rating (most commonly at 230 volts).

In this context, SJO cord is often used in flexible applications where a durable and resilient cord is required. The sizing of conductors must not only accommodate the current but also consider the length of the run, ambient temperature, and the specific application.

The choice of 10 AWG as the minimum conductor size meets the necessary requirements because it accommodates the current load effectively, maintains safety by preventing overheating, and complies with NEC guidelines. This conductor size also provides a sufficient safety margin while ensuring proper voltage drop for motor operation, particularly in longer runs.

By selecting 10 AWG, you are adhering to safe practices for electrical installations, ensuring both effective performance of the motor and compliance with relevant electrical codes.