Fluke's T6 electrical testers feature FieldSense technology for reliable, repeatable measurements. This technology saves time, minimizes potential errors, and reduces the possibility of arc flash. It measures voltage up to 1000 V AC through the open fork, without test lead contact to live voltage, without opening covers or removing wire nuts, and on wires up to AWG 4/0 (120 mm²) carrying as much as 200 A. The voltage measurement requires capacitive path to ground, provided through user in most applications. The ground connection via test lead may be required in some situations. The T6 electrical testers include attached test leads with removable 4 mm probe caps and user documentation.