5 Minor-Servicing LOTO Myths Under ANSI/ASSP Z244.1 and 29 CFR 1910.147

Frequently Asked Questions

Does minor servicing automatically exempt a task from lockout/tagout?

No. Full lockout/tagout remains the default under 29 CFR 1910.147 unless the task fits the narrow minor-servicing exception during normal production and alternative measures provide effective protection.

What makes an alternative method defensible instead of full lockout?

You need a task-specific risk assessment, clear identification of employee exposure, and documented protective measures that effectively control the hazard. Agreement between production and maintenance alone is not enough.

Can an E-stop or interlock replace lockout/tagout by itself?

Not automatically. Those devices may be part of an alternative protective strategy, but you still have to show they control the actual hazardous energy exposure for that specific task.

What records should we keep if we allow minor servicing without full lockout?

Keep the task description, machine-specific procedure, risk assessment, energy-control point details, training and authorized-employee records, and periodic inspection records. Those documents are what support your decision.

Can one risk assessment cover several similar machines?

Usually not by itself. Similar machines can differ in disconnects, guarding, stored energy, and control behavior, so the evidence should still be accurate at the equipment level.