FLUKE | Electrical Tester | T5-600Specifications Jaw opening 12. 9 mm (0. 5 in) Max wire size 1 0 THHN Cable Current range AC rms 0 to 100. 0 A Accuracy AC current (50 60 Hz) 3% 3 counts AC response Averaging Voltage range AC DC 0 to 600 V Voltage accuracy AC 1. 5% 2 counts DC 1% 1 count Resistance range 0 to 1000 (C) Continuity beeper threshold On at < 25 (C) The T5 600 Electrical Tester is a versatile troubleshooting tool you can carry to every job site. Use it to check voltage,