The Extech Instruments 480400 Phase Sequence Tester determines the phase order in three-phase electrical systems and helps confirm wiring configuration before startup. It is rated for up to 600 VAC, providing a quick, straightforward check essential for preventing incorrect phase sequence in motors and equipment. Model 480400 supports safe verification in industrial and commercial electrical installations, making it a practical tool for electricians and technicians who need reliable phase rotation testing.
