May 05, 2023
Every industry has a bitter taste in every industry, especially for electricians, which are called high-risk professions. We cannot see or touch electricity, but we can all feel horror of electricity.
Electricians deal with electricity 365 days a year. We can say that they are on verge of danger. If they are not careful, there is a risk of electric shock. According to current statistics, about 8,000 people die from electric shock every year.
Some causes of electrical shock are equipment problems, some are weather conditions, and most are caused by electricians ignoring basic safety precautions, resulting in irreparable losses due to negligence.
Many accidents are actually avoidable. In everyday work, if you keep these four safety precautions in mind, you can practically guarantee that there will be no accidents.
1. Power off
Turn off power switch before starting work. This is normal if it is a switch with an obvious opening point, such as an isolating switch and a load switch.
However, if it is a circuit breaker, then disconnection point is not visible, which is dangerous, for example, circuit breaker is faulty and seems to be pulled out, but internal contacts cannot be broken, and power is turned off. still. This situation is very common. So that includes second item, electrical inspection.
2. Checking electrical equipment
Attention must also be paid to electrical test, and electrical test must be carried out with same and undamaged voltage detector.
High voltage electroscope
You cannot use a 10 kV electroscope to test 35 kV high voltage electricity, so it can be fatal during a power test. It is also not possible to use a high voltage electroscope to test low voltage electricity, so it is not possible to check if there is electricity.
The electroscope must not only choose a match, but also ensure its integrity and accuracy. The most effective way is to use electroscope pen to test current-carrying parts with electricity to test after power failure of equipment, and then confirm that electroscope is good. Check power of de-energized equipment and check power of each phase. Even do an electrical test on every working part, don't be afraid of trouble. Accidentally touching electricity is not worth candle.
3. Install a ground wire
Especially when carrying out maintenance work on a high voltage system or a high current circuit, it is very necessary to install a ground wire. This is most effective measure to prevent accidental power supply by people during electrical work, as well as last barrier to ensure safety.
When installing a ground wire, ground end must be connected first, followed by conductor end; The procedure for removing ground wire is reversed. The ground wire must consist of several strands of soft bare copper wire, and cross section of ground wire must be at least 25 mm2.
4. Put up signs and barriers
At handle of a switch that can supply power to a workplace or construction equipment after it is closed, a sign must be posted with inscription "Do not close, people are working."
These four points seem simple, but they have rigor and skill. It is not so easy to complete each task completely. But for personal safety of themselves and those around them, everyone must strictly observe it. Accidents often occur due to these seemingly unintentional little things, and these little things are also easiest to ignore.