With this instrument
and can distinguish the null line and the fire wire to avoid the risk of electric shock
You could watch it by clicking following links Video
Cylindrically design for shear measurements
High quality agate bearing for an extremely long service life
DDS528L Backlight Display Home Single-phase Rail Energy Meter 5-32A, 230V 50Hz Backlight Display, 110V 60Hz Backlight Display daily use of rubbing alcohol With this instrument1. Rugged, compact and lightweight, low power consumption, easy to install and operate 2. The internal integrated circuit is made by SMT process, with good anti electromagnetic interference performance and stable performance 3. Clear display on the LCD screen, which can cyclically display voltage, current, power, and kilowatt hour energy 4. Material: plastic, integrated circuit 5. Current: 5 32A 6. Voltage: 110V 60Hz, 230V 50Hz 7. Current rate: