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Wiring Method, Components and Equipment Standard: Avoiding Workplace Injuries

F Marie Athey OHST

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F Marie Athey OHST | November 12, 2013 | Comments Off on Wiring Method, Components and Equipment Standard: Avoiding Workplace Injuries

The standard for the electrical, wiring method, components and equipment (29 CFR 1010.305) is one of the most cited OSHA standards for 2012. Electrocutions, which may also occur from faulty electrical wiring, still make up 9 percent of the total Construction deaths, according to BLS data. But does it always have to be that way?

Most of us know for a fact that these accidents could have been prevented by simply observing the requirements of OSHA standards. So if your work is involved with tinkering with wiring components, what should you know about? How can you avoid injuries while on the job? According to the OSHA standard’s general requirements (29 CFR 1910.305 (a)(1)):

–       Enclosures, raceways, cable trays, fittings, and other non-conductors made from metal used for grounding conductors should be bonded properly to a certain part as required to effectively ensure the circuit flow and to be able to handle the fault current that may possibly pass through them. Nonconductive coatings should be removed from threads and contact point and surfaces. The application of the said coating on fittings that meet the requirement can eliminate the need for the removal.


–       To reduce electrical noise from a grounding circuit, the equipment enclosure can be isolated from a raceway as long as the circuits contained by the raceway supply electricity only to the equipment. Nonmetallic raceway fittings placed between the connecting point between the raceway and equipment enclosure make the circuit flow possible. An internal insulated grounding conductor for equipment linked to the device’s enclosure will be used to support the metal raceway.


–       Wiring systems should not be installed in ducts where known fire hazards such as dust, flammable gasses, and other loose materials are stored or are used to transport them. The same goes for ducts utilized for the elimination of hazardous vapors and for ventilation for cooking equipment.

For a complete copy of the provisions of the standard, especially those relating to the use of cable trays, feeders and temporary wirings, visit OSHA’s page for the standard, or’s illustrated summary of the standard.  You can also refer to OSHA’s Electrical Standards or NFPA 70e standard. The standard covers regulations that apply to using energized equipment and disconnecting them to prevent the occurrence of electrocutions, fires, arc flashes and other electrical hazards.

Overcurrents, which potentially cause sparks and electrical hazards that in turn result in injuries, can be prevented with OSHA safety training. Speak to an representative today.

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