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1926.66(e)(9) Fail-Safe Controls
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Electrostatic apparatus shall be equipped with automatic controls which will operate without time delay to disconnect the power supply to the high voltage transformer and to signal the operator under any of the following conditions:
Stoppage of ventilating fans or failure of ventilating equipment from any cause.
Occurrence of a ground or of an imminent ground at any point on the high voltage system.
Reduction of clearance below that specified in paragraph (e)(6) of this section.
Stoppage of the conveyor carrying goods through the high voltage field.
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