Lockout/tagout (LOTO) procedures are used during the servicing of machinery or equipment primarily to:

Explanation

Lockout and tagout exist to keep machinery from energising or starting up unexpectedly while someone is cleaning, repairing, servicing or adjusting it, and to release or restrain energy that is already stored - hydraulic pressure, a suspended load, a compressed spring, a charged capacitor. The wrong answers name real benefits of a locked machine that are not the purpose of the standard. Keeping unauthorised operators off (a) is security. Protecting the machine (b) is maintenance practice, and this standard protects the person rather than the equipment. And a damaged supply cord (c) is a shock hazard answered by before-use inspection and by GFCI protection, which are live-electrical controls rather than energy isolation.