# How to ensure the instrument is shock free?

#### SJ.LITHVIKSAI

Hi all,

Actually I have an instrument to detect component failure.
Which is operated at 230V AC @50HZ. If instrument properly connected earth..when I test earth to neutral voltage it's around 3V AC..
If i removed earth from the instrument then i measured the voltage between Neutral to the Instrument Body it shows around 105 Volt, Is it right way to test the instrument?
How can i ensure the instrument is safety and shock free?
Please share us your suggestions because if suppose earth got failed no one get affect due to this 105 Voltage