How to hold the indicator screwdriver?

Alexander asks:
Hello. There was a question when watching various videos on the Internet about the indicator screwdriver. Essence of the question. Some storytellers describe the situation in order to find the phase using this screwdriver, you need to touch the back of the screwdriver and actually touch the other part to the wire, if there is an indication, then this is the phase and vice versa. Other storytellers suggest simply touching the front of the screwdriver to the wire and without locking the back of the finger. Who is right or is it some nuances that are silent initially? I apologize for the stupid question and thanks in advance for the answer.
The answer to the question:
Hello! The question is not stupid, your health and life may depend on the correct use of the indicator.

To begin with, the screwdriver works on the principle of current flowing through the phase, a lot of resistance, an indicator (LED or neon bulb) to the ground through your body. Therefore, yes - you need to touch the "ass"!
Further, we note that there are two types of indicator screwdrivers:
1. Good and reliable - with a neon bulb and no batteries - they only burn when the phase and the back are touched, they do not burn at zero.
2. Bad and doubtful - with LED and batteries. They burn with varying degrees of brightness at phase and zero, so it is not always possible to understand what is what. Burn with and without touching the back. Burn even when touching a piece of wire lying on the table. But they can ring the circuit, if you take up the sting, and with your ass touch the ring chain, or drive over the cable under voltage - where it stopped burning - there is, in principle, no voltage.

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Posted: Updated: 15.01.2020 1 comment
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  • Alexander
    01/16/2020 at 11:45

    I’ll supplement Alexander a little ... pointers (indicators, this is not the right name ...) are different for this and you need to use them accordingly differently. The usual one is a neon bulb and resistance, such a pointer (indicator) should be touched when searching for a phase. There is an active indicator - an LED, small batteries and a transistor, it’s unnecessary to touch when searching for a phase, it’s not difficult to determine which one is with your hands ... touch the both ends of the pointer ... it’s off with a neon… it’s on, it’s active (there should be normal batteries), who else uses it There are opportunities ... well, there are electronic scoreboards, you need to read instructions for them

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