Adjustment controls and test and service points should be located away from hazards.
Additional Information:
Adjustment controls and test and service points should not be located close to dangerous voltages, moving machinery, or other hazards, since contact with these hazards may injure maintenance workers or cause them to damage plant equipment by their sudden motion. They should be separated by more than a hand's width, 4.5 in (114 mm), from the nearest hazard. If a hazardous location cannot be avoided, the control, test point, or service point should be appropriately labeled, shielded, and guarded.