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Sagot :
Answer:
Working on live circuits
There are times when working on or around a live circuit is unavoidable, but most of the time, that isn’t the case. A worker will look at a job and decide it’s only going to take a few moments, so he won’t bother to throw the breaker or take similar safety steps. That’s especially true if he doesn’t expect to come in contact with the electrical lines – such as a painter who will paint around a wall outlet or light switch.
But accidents do happen, and even a momentary contact with a live circuit could cause a serious injury. Even if the worker isn’t hurt by the shock, he can be startled and jump or fall backwards into another person or an object. The workers who take shortcuts with live circuits are the workers who end up hurting themselves or those around them.
Skipping lockout/tagout
A variation of working on live circuits is ignoring the safety protection offered by lockout/tagout procedures. While lockout/tagout procedures may just seem to add time-consuming steps to simple jobs, they are very effective at protecting workers from both shock hazards and the possibility that a piece of equipment may start up while it’s being inspected or worked on.
Even on low-voltage circuits, verify that current has been shut off at the switch box, and install a padlock to keep it from being reenergized. Then place tags on any switches or controls to make it clear that the equipment is out of service. Only the worker who locked out the equipment or a person with specific authorization should be allowed to remove the tags and lock.
Forgetting PPE
The right personal protective equipment is part of safety procedures for any task, and electrical work is no exception. Depending on the nature of the work, that may include everything from rubber insulating gloves, to face shields, to special helmets. Before beginning a task, a worker should verify what PPE is required, and inspect the equipment to ensure that it will provide adequate protection. Supervisors should verify that workers know how to properly use the PPE that will be required on the site.
Improper grounding
A properly grounded circuit provides a very high level of security, because it directs the flow of electricity away from the human body by giving it a faster route to an earth ground. However, many craftspeople don’t take the time to inspect ground wires to ensure that they provide the right protection. Sometimes, installers will try to save a couple minutes and a wire nut by not bothering to attach the ground wire to the electrical box. That kind of laziness creates a hazard for everyone who uses equipment attached to that box. Another example is broken grounds on the ends of extension cords. While the cord still conducts electricity, it doesn’t provide the protection of a grounded circuit.
Damaged extension cords
Speaking of extension cords, it always amazes us to see craftspeople using cords that we wouldn’t touch on a bet. In addition to damaged grounds, we’ve seen extension cords where the insulation has been damaged and bare copper wire is showing through – or where someone used duct tape to make a quick repair or splice to a damaged cord. If that damaged area comes in contact with a wet or moist surface, or bare metal such as rebar, it could create a deadly shock. Just throw damaged cords away and buy new ones. They’re not that expensive – definitely a lot less than the cost of a serious injury or fatality.
Most craftspeople know about electrical safety, so accidents aren’t the result of ignorance. Instead, they usually happen when someone tries to take a shortcut, or has become so comfortable using an unsafe approach that he forgets to follow safety procedures. This time, he may be lucky – but next time, it may be an entirely different story.
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