A sole owner (without employees) of a contracting firm was performing maintenance and repair work for a cork processing company. He was working on the motor for a Nu Vac 480-volt, 14.9-kilowatt pneumatic roof-mounted conveyor system. He found the motor to be running roughly. As he was examining it, the motor tripped the electric starter.

He went to the electrical room on the third floor of the building to open the Square D 60-ampere, standard-duty disconnect switch rated at 600 volts. An explosion and electrical fault occurred, involving not only the switch but also a portion of the surrounding electric equipment. The ensuing electric arc burned the contractor. He was hospitalized with first- and second-degree burns to his right hand and arm and his face.

The company processed cork, including grinding, sifting, and blending cork. Because of inadequate housekeeping, combustible cork dust was present throughout the electrical room. The open-type electric equipment was unsuitable for use in Class II, Division 1 or 2 locations.

What procedures and policies could have been put in place to prevent this injury?

Question

13-09-2023
Physics

College

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A sole owner (without employees) of a contracting firm was performing maintenance and repair work for a cork processing company. He was working on the motor for a Nu Vac 480-volt, 14.9-kilowatt pneumatic roof-mounted conveyor system. He found the motor to be running roughly. As he was examining it, the motor tripped the electric starter.

He went to the electrical room on the third floor of the building to open the Square D 60-ampere, standard-duty disconnect switch rated at 600 volts. An explosion and electrical fault occurred, involving not only the switch but also a portion of the surrounding electric equipment. The ensuing electric arc burned the contractor. He was hospitalized with first- and second-degree burns to his right hand and arm and his face.

The company processed cork, including grinding, sifting, and blending cork. Because of inadequate housekeeping, combustible cork dust was present throughout the electrical room. The open-type electric equipment was unsuitable for use in Class II, Division 1 or 2 locations.

What procedures and policies could have been put in place to prevent this injury?

Answer :

What is switch?

A switch is a tool used in electrical engineering and electronics to open or close an electrical circuit to permit or restrict the flow of current. From basic mechanical switches to complex electronic switches that are employed in contemporary electronic devices, switches come in a variety of sorts and designs.

These are some suggestions for practices and regulations that may have been implemented to stop the injury:

Identification and evaluation of hazards: The cork processing business had to have carried out a hazard analysis to find any potential dangers in the electrical room, such as the existence of combustible cork dust. The risk of electrical arcs and fires brought on by the buildup of dust and other debris ought to have been considered throughout the assessment.

Cleaning and housekeeping: To prevent the buildup of combustible dust and other material in the electrical room, the company should have instituted a regular cleaning and housekeeping program.

Equipment selection: It is inappropriate and unsafe to employ open-type electrical equipment in a Class II, Division 1 or 2 area. Equipment suited for usage in hazardous environments and rated for the particular circumstances present in the electrical room should have been chosen and installed by the company.

Frequent inspection and maintenance of electrical equipment can assist find possible safety concerns before they become life-threatening. Before attempting to start it up, the contractor had to have checked the electrical components and the motor.

Lockout/tagout procedures: To prevent unexpected equipment activation during maintenance or repair operations, the business should have put in place a lockout/tagout policy.

All staff working in the electrical room should have received training on the risks connected with electrical equipment and the best practices for working safely in a dangerous environment. Training also includes supervision. The business was responsible for providing the necessary oversight to guarantee that the protocols were being followed.

Personal protective equipment: To guard against burns from electrical arcs and explosions, the contractor should have been given the proper personal protective equipment, such as gloves, eye protection, and clothes.

The company may have decreased the risk of injury and produced a safer working environment for the contractor and other employees by putting these processes and policies into place.

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Answer :

What is switch?

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