ASHRAE-90.1-2022- - Page 150
Extracted Content
9. LIGHTING
9.1 General 9.1.1 Scope 9.1.1.1 New Building or Site System or Equipment. Lighting equipment and systems serving the lighting needs of new buildings or new site systems and equipment shall comply with the requirements of this section as described in Section 9.2.
This section shall apply to the following:
a. Lighting equipment and systems serving interior spaces of buildings . b. Lighting equipment and systems serving exterior applications.
Exceptions to 9.1.1.1:
- Emergency lighting that is automatically off during normal operation.
- Lighting, including exit signs, that is specifically designated as required by a health or life safety statute, ordinance, or regulation.
- Decorative gas lighting systems . 9.1.1.2 Additions to Existing Systems and Equipment. Lighting equipment and systems installed in addition to existing buildings and existing sites shall comply with the requirements of Section 9.1.1.1.
9.1.1.3 Alterations to Existing Systems and Equipment. The alteration of lighting equipment and sys- tems in an interior space shall comply with Section 9.1.1.3.1. The alteration of a lighting system in an exterior application shall comply with Section 9.1.1.3.2.
The maintenance of an existing lighting system to return it to working order shall not be considered an alteration . Retrofitting a luminaire for which the original lamps and ballast/driver are replaced with a new lamp/light source and driver / ballast that was not a component of the original luminaire shall be considered an alteration .
9.1.1.3.1 Alterations for Interior Building Spaces. The alteration of a lighting system in an interior space shall meet one of the following requirements:
a. The alteration shall comply with Section 9.2 when the total wattage of all new and retrofitted luminaires
is greater than 2000 W. b. When the total wattage of all new and retrofitted luminaires is 2000 W or less, each altered space shall
comply with the LPA of Tables 9.5.2.1-1 and 9.5.2.1-2 and Section 9.5.2.2, or the alteration shall result
148 ANSI/ASHRAE/IES Standard 90.1-2022 (I-P)