What are the OSHA standards for interlocks?

OSHA does not have a specific standard solely for interlocks but includes interlocking requirements under machine guarding and lockout/tagout regulations:

1. Machine Guarding (29 CFR 1910.212):

• Guards must protect workers from hazards, and interlocks can be used to ensure machines stop when guards are opened or removed.

2. Control of Hazardous Energy (Lockout/Tagout) – 29 CFR 1910.147:

• Interlocks can be part of the system to ensure machines cannot start unexpectedly during maintenance or servicing.

3. Specific Equipment Standards:

• Some OSHA standards for specific machinery (e.g., presses, robots) require interlocks as part of the safety system.

Key Points:

• Interlocks must be reliable and effective in stopping hazardous machine operation.
• Guards with interlocks must not be easily bypassed or tampered with.
• Interlocks should ensure machines cannot restart until guards are securely in place.

Compliance with these standards helps protect workers and meets OSHA requirements for a safe work environment.

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