If an energy isolating device cannot be locked out, what must an employer use?

When an energy isolating device cannot be locked out, the appropriate method an employer must use is a tagout system. Tagout procedures involve placing a tag on the energy isolating device to indicate that the equipment cannot be operated and may be under maintenance or servicing. This provides a visual warning to employees that they should not re-energize or operate the machine, even if it cannot be physically locked out.

The tag serves as a proactive means of communication about potential hazards and is essential for maintaining safety when lockout options are unavailable. While a tag does not provide the same degree of physical security as a lock, it still plays a critical role in ensuring that workers are aware of ongoing work and that they do not inadvertently expose themselves to unsafe conditions.

In scenarios where lockout is not feasible, using a tagout system complies with OSHA standards, which stipulate that if an energy control device cannot be locked out, a tagout must be implemented to protect workers against unexpected energization or startup of machinery and equipment.