OSHA 1910.147: 5 LOTO Mistakes That Conflict With ANSI Z244.1

Frequently Asked Questions

What are the most common LOTO mistakes that conflict with ANSI Z244.1?

The post highlights five common problems: treating all servicing tasks the same, missing stored or secondary energy sources, weak group lockout execution, procedures that are technically correct but hard to use, and training that only proves attendance instead of field competence.

When should a task use full lockout instead of alternative protective measures?

The post says teams should decide based on the actual task steps and energy exposures, not a blanket rule. Key questions include what energy sources are present, where exposure can occur, and whether unexpected startup, stored energy, or movement is possible.

Why is hitting the start button not always enough to verify zero energy?

The post explains that trying the start button alone may miss hazards involving motion, pressure, or stored force elsewhere in the system. Procedures should also address stored, residual, and re-accumulating energy and verify that every energy source has been controlled.

What makes group lockout/tagout fail in the field?

Common breakdowns happen during shift changes, contractor coordination, and multi-craft work. The post says weak systems often lack clear individual protection, clear accountability, and real-time communication about who is protected and the exact machine status.

How can I tell if LOTO training is actually effective?

The post says effective training shows up in the field, not just on a sign-in sheet. Signs of a stronger system include role-based training, hands-on demonstrations at the equipment, observations of real lockout work, and corrective coaching when shortcuts or confusion appear.