The test pencil's internal structure and the dangers of test pencil damage
What will happen to the live wire if the test pen's resistance breaks? The likelihood of this electric shock is fairly high because it will lead to live operation and judgment errors whether it results from an open circuit or a drop in internal resistance.
The test pen's interior structure
The conventional electric measuring pen has a relatively straightforward design. Neon lights, springs, caps, and high-resistance resistors make up its components. When there is low power, neon bulbs do not produce light. Usually, they can only light up when the voltage is greater than 100v. If they are not beaten, it is hard to harm them.
High-resistance resistors come in different resistance values. Though the demand can theoretically be met by more than 500k ohms, we anticipate that the better the resistance value, the better. It will be open because it is obvious that it cannot be endless. The electric pen needs to be checked and maintained periodically in case we make a mistake.
What occurs then if the electric pen's resistance is less than the desired level? When the electric pen comes in contact with an electrified body, the human body is obviously vulnerable to electric shock. I think everyone can learn from this, especially electricians.
the potential for test pencil damage
Because of the infinite resistance, we may mistakenly believe that an electrical equipment is devoid of electricity and that electric shock during maintenance operations poses a serious risk to the body.
When measuring a charged body, an electric measuring pen with a resistance lower than 500k ohms will cause people to feel numb. Lower resistance is akin to touching a live wire with one's hand, and the results could be fatal.
