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The IDEAL 61-520 3-Phase Sequence Tester is a positive action electrical tester and will indicate both Phase Sequence and Phase Continuity instantly and accurately. Simple, easy to read voltage testing for use up to 600V. Color-coded insulators over alligator clips for accurate and convenient testing. Made with a rugged, shock resistant housing to ensure a long life of your product. IDEAL Electrical has been committed to craft and its craftsmen for more than 100 years. Whether you’re the electrical contractor or datacomm technician, production engineer or plant manager, we know the job the way you know the job.