3003 W CASINO RD BLDG 40-53 2019-06-26

GENERAL REGULATIONS • wide. A level service space not less than 30 inches(762 mm) the lack of a walking surface,such as might occur in an deep and 30 inches(762 mm)wide shall be present at the front attic or similar space with exposed ceiling joists. The or service side of the appliance. The clear access opening intent of this section is to require a suitable access dimensions shall be a minimum of 20 inches by 30 inches(508 opening, passageway and work space that will allow mm by 762 mm),and large enough to allow removal of the larg- reasonably easy access without endangering the ser- est appliance. vice person (see Commentary Figure 306.3). The lon- Exceptions: ger the attic passageway,the more the service person will be exposed to extreme temperatures and risk of in- 1. The passageway and level service space are not jury, required where the appliance is capable of being ser- Exception 1 allows the passageway and level ser- , viced and removed through the required opening. vice space to be eliminated if the technician can reach 2. Where the passageway is unobstructed and not less the appliance through the access opening without than 6 feet(1829 mm)high and 22 inches(559 nun) having to step into the attic. Exception 2 allows the wide for its entire length,the passageway shall be not length of the passageway to be extended to 50 feet(15 greater than 50 feet(15 250 mm)in length. 250 mm) if there is at least 6 feet (1829 mm) of clear +There is not always sufficient room for mechanical headroom for the entire length of the passageway. This is allowed because there is less danger of lengthy equipment and appliances to be installed in spaces exposure to extreme temperatures if the service per- such as basements,alcoves, utility rooms and furnace equip- rooms. In an effort to save floor space or simplify an in- sonnet can walkerect and unimpeded to the stallation, appliances and mechanical equipment are ment ratherthancrawling. often installed on roofs, in attics or in similar remote lo- Note that some appliances might not be listed for at- cations.Access to appliances and equipment could be tic installation or might otherwise be unsuitable for s difficult because of roof slope, stone roof ballasts or such conditions. 125 VAC CONVENIENCE RECEPTACLE LIGHT FIXTURE FURNACE EQUIPMENT DISCONNECT SWITCH MIN /..4111411111111111111111111111111111111111111 I _111111111111- 24"WIDE WALKWAY �_ / /_II - 0 11 _I LIGHT SWITCH II NEAR ACCESS OPENING ACCESS OPENING For SI: 1 inch=25.4 mm. Figure 306.3 REMOTE LOCATION REQUIREMENTS (ATTIC INSTALLATION) 2009 INTERNATIONAL MECHANICAL CODE®COMMENTARY 3-25