The Extech 480403 Phase Sequence and Motor Rotation Tester determines the phase orientation of a three-phase power supply or the direction of rotation on a three-phase motor. The durable double-molded housing and three large, wide-jaw color-coded alligator clips are rated CAT III-600V for safe use in industrial environments .

The non-contact motor rotation feature allows users to check the direction of motor rotation on a running motor by simply placing the meter in close proximity to the motor with the same orientation as the easy-to-read schematic on the face of the meter. The rotation LEDs then light up to indicate clockwise or counter-clockwise rotation .

The alligator clamps can check the phase rotation of a power supply and indicate whether each of the three phases is live or not. This allows maintenance personnel to ensure that a motor being connected to the power supply will not be damaged or cause equipment damage by starting in the wrong direction .

The Extech 480403 is considered a "must-have" for any industrial maintenance electrician's tool bag, providing essential verification for three-phase systems and motor installations .