(a) Plumbing, heating, electrical, ventilating, air conditioning, refrigerating, cooking, fire protection and radiation production equipment, elevators, dumbwaiters, escalators and other mechanical additions, installations or systems for the use of the building shall be installed, located and maintained so that under normal conditions of use such equipment and systems will not be a danger to health or welfare, a danger because of structural defects, or a source of ignition or a radiation hazard, and will not create excessive noise, or otherwise become a nuisance. Equipment and systems include, but are not limited to apparatus, devices, fixtures, piping, pipe hangars, pipe covering, wiring, fittings and materials used as part of or in connection with such installations.
(b) Equipment and systems subject to damage from freezing shall be adequately protected against freezing.
(c) Moving parts of equipment which may be a potential hazard shall be guarded to protect against accidental contact.