Courtesy of www.MikeHolt.com All questions and answers are based on the 2020 NEC. Q. What does the NEC require as the minimum size of branch-circuit conductors for a single motor compressor for air ...

Article 440 applies to electrically driven air-conditioning (A/C) and refrigeration equipment. Each equipment manufacturer has the compressor motor built to its own specifications. The motors are ...

One of the more popular three-phase electrical services supplied to medium-size commercial buildings is the Wye or Star configuration transformer. The name comes from the transformer’s secondary ...

In this HVAC training video program, Jim shows how to eliminate the mystery behind compressor motor windings and learn how to use a meter to make electrical checks on compressors. Includes information ...