The current from which reference is utilized to determine the branch circuit conductor size for a 1Ø motor?

To determine the appropriate size of branch circuit conductors for a single-phase (1Ø) motor, the nameplate on the motor provides essential information. The nameplate indicates the motor's full-load current rating, which is critical for ensuring that the conductors can safely carry the load without overheating or causing a voltage drop.

While the referenced tables in the electrical code contain important guidelines, the specific current rating for a motor is derived from its nameplate. This information is tailored to the individual motor's design and operational characteristics, ensuring that the installed conductors are appropriately matched to handle the electrical requirements of the motor during operation.

In terms of the other references provided, while they relate to motor installations, they do not specifically serve as the primary source for identifying the branch circuit conductor size based on the motor's operational current. Thus, the nameplate remains the definitive source for determining the current to accurately size branch conductors for single-phase motors.