Will this work on 4/0 wire?

Yes I personally used it on 750MCM which is 5 times the diameter of 4/0. This is a great phase rotation meter.

Does it work on 480-V delta and wye systems?

Yes. It has worked perfectly on all systems and all voltages up to and including 480 for us. Excellent tool and much safer.

Will this work on the output of a VFD?

It should as long as the VFD is running (being commanded to go a direction at 50-60 HZ)

Can this be used on single phase 240 volt service?

Hi, phase sequence is only used to determine the correct phasing of the 3 phase supply. You need not use this device for single phase at all. You only need a volt meter to ensure that the supply is in order in terms of L N E.

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Extech 480400 Phase Sequence Tester with LED Indicators - Detects Phase Orientation, Motor Rotation, Live Wire Status - Compact, Durable, CAT III 600V Rated Electrical Tool

Product ID: 7237213

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Details

Brand
Extech
Power Source
Battery
Style
480400
Color
480400
Item Weight
0.14 Kilograms

⚡High-voltage safe

⏱️Speeds up inspections

🛡️Corrosion-resistant frame

Description

⚡ Inspect smarter, safer, faster — don’t get left in the dark!

TIME COST EFFICIENCY - Minimizes inspection duration and expenses, accelerating your workflow without compromise.
ENHANCED SAFETY PROTOCOL - Reduces injury risk by replacing traditional inspection methods with cutting-edge technology.
BROADBAND CA F 2 CRYSTAL CLARITY - Advanced Calcium Fluoride crystal supports visual, thermal, and fusion inspections with crystal-clear results.
PRECISION THERMOGRAPHIC INSIGHT - Enables accurate thermal imaging in high-voltage environments for safer diagnostics.
RUGGED STAINLESS STEEL DURABILITY - Built to withstand harsh industrial conditions with superior corrosion resistance.

The Extech 480400 Phase Tester is a robust, high-voltage inspection tool featuring a broadband Calcium Fluoride crystal for versatile thermal and visual diagnostics. Its corrosion-resistant stainless steel frame ensures durability in tough environments, while its design significantly reduces inspection time and enhances operator safety.

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