Protection Against Unexpected Startup
Proper lockout/tagout procedures protect you from the dangers of the accidental or unexpected startup of electrical equipment and are required for general industry by OSHA Standard 1910.333, Selection and Use of Work Practices .
For construction applications, the requirements are outlined in 29 CFR 1926.417, Lockout and Tagging of Circuits . These procedures ensure that electrical equipment is de-energized before undergoing repair or inspection, thereby providing protection against electrocution or shock.
Before starting any inspection or repair job, the first step is to turn off the equipment. Next, proceed to lock out the related circuit breaker, ensuring it remains in the off position. This applies even on so-called low-voltage circuits. By securely tagging or locking the switch or controls of the machine or equipment being repaired, you can prevent others from inadvertently energizing the equipment.
Maintenance of electrical equipment should be performed only by qualified electricians who have received training in safe lockout procedures. One individual lock and key should be issued to each maintenance worker authorized to lock out the equipment. Authorized employees who repair equipment must use unique individual locks. In most instances, only authorized workers are permitted to remove lockout devices.
A 29-year-old temporary worker at a food processing plant suffered critical injuries and a leg amputation after falling into an industrial blender while cleaning it during an overnight shift. OSHA found the company had failed to train workers on proper lockout procedures to prevent movement during cleaning and maintenance. As a result, OSHA cited the plant for multiple violations, amounting to $1.9 million in proposed penalties.
To prevent similar accidents, OSHA recommends that employers in the food manufacturing industry follow recognized safety standards, including proper training on lockout/tagout procedures and ensuring compliance with machine safety procedures.
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2-7. Which of the following procedures protects the electrician from accidental or unexpected equipment startup?
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