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Control definitions for limited powered movement

Operators sometimes remove or open interlocked guards or enter a danger zone to carry out adjustments/process correction. Where dangerous parts are unprotected, then the machine should only start by hold-to-run devices combined with:

If these hold-to-run controls reduce the ability of the machine to perform its function, provided there is no substantial increased risk, the following can be used:

If dangerous parts are protected by trip or nip bars when interlocked guards are opened/removed or persons enter a danger zone to carry out adjustments/process correction, continuous operation may be possible provided there is no substantial increased risk.

Updated: 2014-06-19