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Appliance (mechanical): A device or apparatus [- including any attachments or apparatus designed to be attached -] which is manufactured and designed to utilize [electricity, natural gas, manufactured gas, mixed gas, liquefied petroleum products, solid fuel, oil or any gas as a fuel for heating, cooling, ventilating, cooking or developing heat, light or power.] energy and for which this code provides specific requirements.

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Equipment (mechanical): See "Appliance (Mechanical)."

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M-403.1 Labeling: All mechanical equipment and appliances regulated by this code shall bear the label of an approved agency unless otherwise approved in accordance with [Section M-107.0] the administrative provisions of this code.

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M-405.2 Wind resistance: Mechanical equipment and supports which are exposed to wind shall be designed and installed to resist the wind pressures determined in accordance with Section M-1611.0 of the building code.

M-405.[2] 3 Seismic supports: Where earthquake loads are applicable in accordance with Sections 1612.1 and 1612.6 of the building code, mechanical equipment, piping and duct supports shall be designed and installed for seismic forces in accordance with the building code.

M-405.[3] 4 Access: Access shall be provided to all mechanical equipment, appliances, appliance controls, gauges, burners, filters, blowers and motors.

M-405.[4] 5 Clearance: Appliances shall be installed with the minimum clearances to combustibles for which the appliance has been tested as specified by the manufacturer.

M-405.5.1 Installation in confined spaces: An appliance installed in a space that is not large in comparison with the size of the appliance therein, shall be labeled for installation in confined spaces such as alcoves or closets and shall be installed with clearances in accordance with the manufacturer's installation instructions, regardless of the type of construction of such space. For the purposes of this section, a confined space shall be any room or space having a volume less than 12 times the total volume of furnaces or air-conditioning appliances, or less than 16 times the total volume of boilers, installed therein. The total volume of appliances and boilers shall be based on the exterior dimensions of such. Where the actual ceiling height of the confined space exceeds 8 feet (2438 mm), the space volume shall be based on a ceiling height of 8 feet (2438 mm).

M-405.[5] 6 Floor: Appliances shall be installed on combustible or noncombustible flooring in accordance with the manufacturer's installation instructions and the terms of labeling. A noncombustible floor, where required, shall extend a minimum of 12 inches (305 mm) beyond the sides of the appliance. The noncombustible floor shall extend a minimum of 36 inches (914 mm) on the burner side or combustion chamber opening side.

M-405.[6] 7 Remote location: A walkway having a minimum width of 24 inches (610 mm) shall be provided, leading from the access opening to the appliance where an appliance is installed in a remote location.

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M-406.3.1 Public garages: Appliances located in public garages, service stations, repair garages or other areas frequented by motor vehicles, shall be installed a minimum of 8 feet (2438 mm) above the floor. Where motor vehicles exceed 6 feet (1829 mm) in height and are capable of passing under an appliance, appliances shall be installed a minimum of 2 feet (610 mm) higher above the floor than the highest vehicle.

Exception: The requirements of this section shall not apply where the appliances are protected from motor vehicle impact and installed in accordance with Section M-406.2 and NFPA 88B.

M-406.3.2 Private garages: Appliances located in private garages shall be installed with a minimum clearance of 6 feet (1829 mm) above the floor.

Exception: The requirements of this section shall not apply where the appliances are protected from motor vehicle impact and installed in accordance with M-406.2.

[M-406.3.3 Protection alternative: Appliances protected from motor vehicle impact shall be installed in accordance with Section M-406.2 and NFiPA 88B listed in Chapter 21.]

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M-407.2 Guards: Guards shall be provided where appliances, equipment, fans or other components that require service are located within 10 feet (3048 mm) of a roof edge or open side [with a drop greater] of a walking surface and such edge or open side is located more than [24] 30 inches ([610] 762 mm) above the floor, roof or grade below. The top of the guard shall be located not less than 42 inches (1067 mm) above the elevated surface adjacent to the guard. [and] The guard shall be constructed so as to prevent the passage of a 21-inch-diameter (533 mm) sphere and shall comply with the loading requirements for guards specified in the building code.

M-407.3 Access: Access shall be [possible] maintained under all weather conditions.

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M-409.2 Convenience outlet: A 125-volt AC grounding-type receptacle outlet shall be available for all appliances. The convenience outlet shall be located on the same level within [75] 25 feet [(22860 mm)] (7620 mm) of the appliance. The outlet shall not be connected to the load side of the appliance disconnect switch.

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