385. Any compressed air line or hydraulic line operating under pressure of more than 200 kPa (29.0 lb/in2) shall:(1) if it is metallic, be placed so that it is sheltered from any shock that might be caused by the equipment or by motorized vehicles;
(2) if it is flexible and has an interior diameter of more than 30 mm (1.2 in), be equipped with collars connected by a steel cable 5 mm (0.2 in) in diameter or an equivalent safety chain or a self-locking device to prevent whiplash.