MSHA - Code of Federal Regulations - 30 CFR 57.4503
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MSHA - Title 30 CFR
30 CFR § 57.4503
Conveyor belt slippage.


(a) Surface belt conveyors within confined areas where evacuation would be restricted in the event of a fire resulting from belt-slippage shall be equipped with a detection system capable of automatically stopping the drive pulley.

(b) Underground belt conveyors shall be equipped with a detection system capable of automatically stopping the drive pulley if slippage could cause ignition of the belt.

(c) A person shall attend the belt at the drive pulley when it is necessary to operate the conveyor while temporarily bypassing the automatic function.


For further information: See MSHA's Program Policy Manual