OSHA Danger This Machine Starts Automatically Do Not Enter Sign Stickers

This sign combines two critical messages it warns workers that the machine activates automatically, and it explicitly prohibits entry into the machine zone. The Do Not Enter instruction makes clear the hazard zone is off-limits to unauthorized workers, not merely a caution area. This dual message is especially appropriate for automated work cells and machine enclosures where both the automatic start hazard and zone entry restriction need to be communicated together.

Post at all entry points to automated machine zones on enclosure doors, safety gates, perimeter barriers, and any access point to the hazardous area. The Do Not Enter message should face outward, clearly visible to any worker approaching. For large automated work cells, post at every access point.

Yes. OSHA 29 CFR 1910.212 (General Machine Guarding) requires that machine hazard zones be clearly identified and workers prevented from entering through physical guarding and administrative controls of which Do Not Enter signage is a recognized component. This sign supports a documented restricted zone program for automatic machinery.

Combining both messages is more effective than two separate signs because it directly explains why entry is prohibited the machine starts automatically, making unauthorized entry hazardous. Signs explaining the reason for a restriction are more likely to be heeded than bare prohibition signs alone.

Danger is appropriate under ANSI Z535.4 for automated machine zones where unauthorized entry during automatic operation presents an immediate risk of serious injury or death. The red Danger header combined with the Do Not Enter instruction creates a high-priority warning that workers recognize immediately.