Section 1130 – Application To Existing Buildings
1132.3 Lighting and Motors|
1501 General Requirements
Figure 15a Lighting, Motor, and Transformer Options
1512 Exempt Spaces and Lighting Equipment
1513 Lighting Control Introduction
1513.1 Local Control and Accessibility
1513.2 Area Controls
1513.3 Daylight Zone Control
1513.3.1 Separate Control
1513.3.2 Automatic Control
Exhibit 1513.3a and 1513.3b
1513.4 Display, Exhibition and Specialty Lighting Controls
1513.5 Automatic Shut-off Controls, Exterior
1513.6 Automatic Shut-Off Controls, Interior
1513.6.1 Occupancy Sensors
1513.6.2 Automatic Time Switches
1513.7 Commissioning Requirements
1521 Prescriptive Interior Lighting Requirements
1522 Prescriptive Exterior Lighting Requirements
Section 1530 Lighting Power Allowance
1531 Interior Lighting Power Allowance
1532 Exterior Lighting Power Allowance
Guide to Section 1532
TABLE 15-1 - Unit Lighting Power Allowance (LPA)

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SECTION 1130 -- APPLICATION TO EXISTING BUILDINGS

Additions, alterations or repairs, changes of occupancy or use and historic buildings that do not comply with the requirements for new buildings shall comply with the requirements in Sections 1130 through 1134.

EXCEPTION: The building official may approve designs of alterations or repairs which do not fully conform with all of the requirements of Sections 1130 through 1134 where in the opinion of the building official full compliance is physically impossible and/or economically impractical and the alteration or repair improves the energy efficiency of the building

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1132.3 Lighting and Motors:Where the use in a space changes from one use in Table 15-1 to another use in Table 15-1, the installed lighting wattage shall comply with Section 1521 or 1531.

Other tenant improvements, alterations or repairs where 60% or more of the fixtures in a space enclosed by walls or ceiling-height partitions are new shall comply with Sections 1531 and 1532. (Where this threshold is triggered, the areas of the affected spaces may be aggregated for code compliance calculations.)

Where less than 60 percent of the fixtures in a space enclosed by walls or ceiling-height partitions are new, the installed lighting wattage shall be maintained or reduced. Where 60% or more of the lighting fixtures in a suspended ceiling are new, and the existing insulation is on the suspended ceiling, the roof/ceiling assembly shall be insulated according to the provisions of Chapter 13, Section 1311.2.

Where new wiring is being installed to serve added fixtures and/or fixtures are being relocated to a new circuit (except as noted in the following paragraph), controls shall comply with Sections 1513.1 through 1513.5 and, as applicable, 1513.7. For compliance with Section 1513.3.2 for existing luminaires where the existing ballasts are not being changed, the number of required incremental steps of automatic daylighting control shall be equal to one plus the number of ballasts in the luminaire. In addition, office areas less than 300 ft 2 enclosed by walls or ceiling-height partitions, and all meeting and conference rooms, and all school classrooms, shall be equipped with occupancy sensors that comply with Section 1513.6. Where a new lighting panel (or a moved lighting panel) with all new raceway and conductor wiring from the panel to the fixtures is being installed, controls shall also comply with the other requirements in Section 1513.6.

Where new walls or ceiling height partitions are added to an existing space and create a new enclosed space, but the lighting fixtures are not being changed, other than being relocated, the new enclosed space shall have controls that comply with Sections 1513.1 through 1513.2 and Sections 1513.4 through 1513.7.

Chapter 15
Lighting, Motors, Transformers
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1501 Scope: Interior and exterior lighting, electric motors, and transformers shall comply with the requirements of this chapter.

SECTION 1510 -- GENERAL REQUIREMENTS:
Lighting and motors shall comply with Sections 1511 through 1513. Lighting systems … shall comply with one of the following paths:

• Prescriptive Lighting Option:
  Interior Section 1521, or
  Exterior Section 1522.
• Lighting Power Allowance Option:
  Interior Section 1531, or
  Exterior Section 1532.
• Systems Analysis. See Section 1141.4.

The compliance path selected for interior and exterior lighting need not be the same. However, interior and exterior lighting cannot be traded.

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Figure 15A
Lighting , Motor and Transformer Compliance Options
(Excerpted to include lighting requirements only)

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1512 Exempt Lighting: The use of these exemptions is at the applicant's option.

1512.1 Exempt Spaces: The following rooms, spaces and areas, are exempt from the requirements in Sections 1520 through 1522 and 1530 through 1532 but shall comply with all other requirements of this chapter.

1. Reserved.
2. High risk security areas or any area identified by building officials as requiring additional lighting.
3. Spaces designed for primary use by the visually impaired or hard of hearing (lip-reading).
4. Reserved.
5. Outdoor manufacturing, greenhouses and processing areas.
6. Electrical/mechanical equipment rooms.
7. Outdoor athletic facilities.
8. Reserved.
9. The sanctuary portion of a house of worship, defined as the space or room where the worship service takes place. Classrooms, meeting rooms, offices and multipurpose rooms that are part of the same facility are not exempt.

1512.2 Exempt Lighting Equipment: The following lighting equipment and tasks are exempt from the lighting requirements of Section 1520 through 1522 and need not be included when calculating the installed lighting power under Section 1530 through 1532 but shall comply with all other requirements of this chapter. All other lighting in areas that are not exempted by Section 1512.2, where exempt tasks and equipment are used, shall comply with all of the requirements of this chapter.

1. Special lighting needs for research.
2. Emergency lighting that is automatically OFF during normal building operation.
3. Lighting integral to signs.
4. Lighting that is part of machines, equipment or furniture.
5. Lighting that is used solely for indoor plant growth during the hours of 10:00 p.m. to 6:00 a.m. However, such lighting shall not be exempt unless it is in addition to general area lighting, is located in a separate fixture, and is controlled by an independent control device.
6. Lighting for theatrical productions, television broadcasting (including sports facilities), audio-visual presentations and special effects lighting for stage areas and dance floors in entertainment facilities. However, such lighting shall not be exempt unless it is in addition to general area lighting, is located in a separate fixture, and is controlled by an independent control device.
7. Lighting in galleries, museums and in main building entry lobbies for exhibits, inspection, and restoration. However, such lighting shall not be exempt unless it is in addition to general area lighting, is located in a separate fixture, and is controlled by an independent control device.
8. Exterior lighting for public monuments.
9. Lighting specifically designed for use only during medical or dental procedures and lighting integral to medical equipment. However, such lighting shall not be exempt unless it is in addition to general area lighting, designed specifically for medical lighting, and is controlled by an independent control device.
10. Lighting integral to or specifically for food warming and food preparation equipment. However, such lighting shall not be exempt unless it is in addition to general area lighting, is located in a separate fixture, and is controlled by an independent control device.
11. Audio-visual and video-conferencing lighting with multi-level or dimming controls in rooms with permanently installed audio-visual equipment or video-conferencing equipment.

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1513 Lighting Controls: Lighting, including exempt lighting in Section 1512, shall comply with this section. Where occupancy sensors are cited, they shall have the features listed in Section 1513.6.1. Where automatic time switches are cited, they shall have the features listed in Section 1513.6.2.

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1513.1 Local Control and Accessibility: Each space, enclosed by walls or ceiling-height partitions, shall be provided with lighting controls located within that space. The lighting controls, whether one or more, shall be capable of turning off all lights within the space. The controls shall be readily accessible, at the point of entry/exit, to personnel occupying or using the space.

EXCEPTIONS: The following lighting controls may be centralized in remote locations:

1. Lighting controls for spaces which must be used as a whole.
2. Automatic controls, when provided in addition to manual controls, need not be accessible to the users and may be centralized in a remote location.
3. Controls requiring trained operators.
4. Controls for safety hazards and security.

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1513.2 Area Controls: The maximum lighting power that may be controlled from a single switch or automatic control shall not exceed that which is provided by a 20 ampere circuit loaded to not more than 80%. A master control may be installed provided the individual switches retain their capability to function independently. Circuit breakers may not be used as the sole means of switching.

EXCEPTIONS:

1. Industrial or manufacturing process areas, as may be required for production.
2. Areas less than 5% of the building footprint for footprints over 100,000 ft².

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1513.3 Daylight Zone Control: Lighting in all daylighted zones, as defined in Chapter 2 (see Exhibits 1513.3a and 1513.3b, both under overhead glazing and adjacent to vertical glazing, shall be provided with controls that comply with Sections 1513.3.1 and 1513.3.2.

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1513.3.1 Separate Control: Daylight zones shall have controls which control the lights independent of general area lighting.

Contiguous daylight zones adjacent to vertical glazing are allowed to be controlled by a single controlling device provided that they do not include zones facing more than two adjacent cardinal orientations (i.e. north, east, south, west). Daylight zones under overhead glazing more than 15 feet from the perimeter shall be controlled separately from daylight zones adjacent to vertical glazing. For daylight zones under overhead glazing that exceed 5,000 square feet, there must be at least two independent photocontrol systems with each system having a dedicated photosensor.

EXCEPTION: Daylight spaces enclosed by walls or ceiling height partitions and containing 2 or fewer light fixtures are not required to have a separate switch for general area lighting.

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1513.3.2 Automatic Control: Daylight zones shall have controls which automatically reduce lighting power in response to available daylight by either:

1. a combination of dimming ballasts and daylight-sensing automatic controls, which are capable of dimming the lights continuously, or
2. a combination of stepped switching and daylight-sensing automatic controls, which are capable of incrementally reducing the light level in steps automatically and turning the lights off automatically.

1. Single-lamp luminaire systems shall three levels of automatic control: all lamps on, approximately half of the luminaires turned off in a relatively uniform pattern, and then all of the luminaires off. As an alternate, where the daylight zone contains two rows of luminaires and they are parallel to a window, three levels of automatic control may also be achieved by having both rows on, the row closest to the window off and the other row on, and both rows off. For rooms, such as small offices, which contain only a single one-lamp luminaire, it is acceptable for the daylighting control system to automatically switch off the entire luminaire.
2. Two-lamp luminaires shall have three levels of automatic control: both lamps on, one lamp on and one lamp off, and both lamps off. As an alternate, where the daylight zone contains two rows of luminaires and they are parallel to a window, three levels of automatic control may also be achieved by having both rows on, the row closest to the window off and the other row on, and both rows off. For rooms, such as small offices, which contain only a single two-lamp luminaire, it is acceptable for the daylighting control system to automatically switch off the entire luminaire rather than switching off one lamp, then both lamps.
3. Three-lamp luminaires shall have four levels of automatic control: all three lamps on, two lamps on and one lamp off, one lamp on and two lamps off, and all three lamps off.
4. For other multi-lamp luminaries with four or more lamps, the number of required incremental steps shall be equal to one plus the number of lamps in the luminaire.

Any switching devices installed to override the automatic daylighting control shall comply with the criteria in Section 1513.6.2a-e.

EXCEPTIONS:

1. The following are exempt from the requirements for automatic daylighting controls in Section 1513.3.2:
   1. retail spaces adjacent to vertical glazing (retail spaces under overhead glazing are not exempt),
   2. lighting exempted by Section 1512, and
   3. display, exhibition, and specialty lighting complying with Section 1513.4.

2. The following spaces are exempt from the requirements for automatic daylighting controls in Section 1513.3.2 provided that they have occupancy sensor controls that comply with Section 1513.6.1:
   1. small spaces in the daylight zone that are normally unoccupied (such as a storage room with a window, or restrooms),
   2. rooms less than 300 square feet, and
   3. conference rooms 300 square feet and larger that have a lighting control system with at least four scene options.
3. HID lamps with automatic controls that are capable of reducing the power consumption by at least 50% in lieu of continuous dimming controls in 1513.3.2.
4. HID lamps 150 watts or less are exempt from the dimming requirements in 1513.3.2.

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Exhibit 1513.3a

Exhibit 1513.3b

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1513.4 Display, Exhibition and Specialty Lighting Controls: All display, exhibition or specialty lighting shall be controlled independently of general area lighting.

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1513.5 Automatic Shut-off Controls, Exterior: Exterior lighting , including signs, shall be capable of being automatically switched off during daylight hours and non-use nighttime hours by either a combination of timer and photocell, or a timer with astronomic control. Automatic time switches shall also have program back-up capabilities, which prevent the loss of program and time settings for at least 10 hours, if power is interrupted.

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1513.6 Automatic Shut-Off Controls, Interior: Buildings greater than 5,000 ft² and all school classrooms shall be equipped with separate automatic controls to shut off the lighting during unoccupied hours. >Within these buildings, all office areas less than 300ft² enclosed by walls or ceiling-height partitions, and all meeting and conference rooms, and all school classrooms, shall be equipped with occupancy sensors that comply with Section 1513.6.1. For other spaces, automatic controls may be an occupancy sensor, time switch or other device capable of automatically shutting off lighting that complies with Section 1513.6.1 or 1513.6.2.

EXCEPTIONS:

1. Areas that must be continuously illuminated (e.g. 24-hour convenience stores), or illuminated in a manner requiring manual operation of the lighting.
2. Emergency lighting systems.
3. Switching for industrial or manufacturing process facilities as may be required for production.
4. Hospitals and laboratory spaces.
5. Areas in which medical or dental tasks are performed are exempted from the occupancy sensor requirement.

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1513.6.1 Occupancy Sensors: Occupancy sensors shall be capable of automatically turning off all the lights in an area, no more than 30 minutes after the area has been vacated. Lighting fixtures controlled by occupancy sensors shall have a wall-mounted, manual switch capable of turning off lights when the space is occupied.

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1513.6.2 Automatic Time Switches: Automatic time switches shall have a minimum 7 day clock and be capable of being set for 7 different day types per week and incorporate an automatic holiday "shut-off" feature, which turns off all loads for at least 24 hours and then resumes normally scheduled operations. Automatic time switches shall also have program back-up capabilities, which prevent the loss of program and time settings for at least 10 hours, if power is interrupted.

Automatic time switches shall incorporate an over-ride switching device which:

1. is readily accessible;
2. is located so that a person using the device can see the lights or the areas controlled by the switch, or so that the area being illuminated is annunciated;
3. is manually operated;
4. allows the lighting to remain on for no more than 2 hours when an over-ride is initiated; and
5. controls an area not exceeding 5,000 ft² or 5% of footprint for footprints over 100,000 ft², whichever is greater.

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1513.7 Commissioning Requirements: ^{**CAM 419; Seattle City Light; Website PECI, Website Oregon Office of Energy**} For lighting controls which include daylight or occupant sensing controls, automatic shut-off controls, occupancy sensors, or automatic time switches, the lighting controls shall be tested to ensure that control devices, components, equipment and systems are calibrated, adjusted and operate in accord with approved plans and specifications. Sequences of operation shall be functionally tested to ensure they operate in accord with approved plans and specifications. A complete report of test procedures and results shall be prepared and filed with the owner. Drawing notes shall require commissioning in accordance with this paragraph.

SECTION 1520 -- PRESCRIPTIVE LIGHTING OPTION
^{**CAM 405; Form Lighting Summary Form; Website Lighting Design Lab**}

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1521 Prescriptive Interior Lighting Requirements: Spaces for which the Unit Lighting Power Allowance in Table 15-1 is 0.80 W/ft² or greater may use unlimited numbers of lighting fixtures and lighting energy, provided that the installed lighting fixtures comply with all four of the following criteria:

1. are one- or two-lamp (but not three- or more lamp);
2. luminaires that have a reflector or louver assembly to direct the light) bare lamp strip or industrial fixtures do not comply with this section);
3. fitted with type T-1, T-2, T-4, T-5, T-8 or compact fluorescent lamps from 5 to 60 watts (but not T-10 or T-12 lamps); and
4. hard-wired fluorescent electronic dimming ballasts with photocell or programmable dimming control for all lamps in all zones (non-dimming electronic ballasts and electronic ballasts that screw into medium base sockets do not comply with this section).

Track lighting is not allowed under this path.

EXCEPTIONS:

1. Up to a total of 5% of installed lighting fixtures may use any type of ballasted lamp and do not require dimming controls.
2. Clear safety lenses are allowed in food prep and serving areas and patient care areas in otherwise compliant fixtures.
3. Exit lights are not included in the count of fixtures provided that they do not exceed 5 watts per fixture and are light emitting diode (LED) type or T-1 fluorescent type only. (See the Uniform Fire Code for face illumination footcandle requirements and other requirements.)
4. LED lights other than exit lights addressed by exception 3.
5. Metal halide lighting which complies with all three of the following criteria:
   1. luminaires or lamps which have a reflector or louver assembly to direct the light;
   2. fixtures are fitted with ceramic metal halide lamps not exceeding 150 watts; and
   3. electronic ballasts.

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1522 Prescriptive Exterior Lighting Requirements: See Section 1532.

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SECTION 1530 -- LIGHTING POWER ALLOWANCE OPTION
^{**CAM 405; Form Lighting Summary Form; Website Lighting Design Lab**}

The installed lighting wattage shall not exceed the lighting power allowance. Lighting wattage includes lamp and ballast wattage. Wattage for fluorescent lamps and ballasts shall be tested per ANSI Standard C82.2-1984.

The wattage used for any unballasted fixture shall be the maximum UL listed wattage for that fixture regardless of the lamp installed. The wattage used for track lighting shall be:

1. for line voltage track, 70 watts per lineal foot of track or actual luminaire wattage, whichever is greater.
2. for low voltage track ( i.e. with remote transformer) (less than 30 volts), the VA rating of the transformer.

No credit towards compliance with the lighting power allowances shall be given for the use of any controls, automatic or otherwise.

Exit lights that are 5 watts or less per fixture shall not be included in the lighting power allowance calculations. Other exit lights shall be included in the lighting power allowance calculations.

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1531 Interior Lighting Power Allowance: ^{**CAM 405; Form Lighting Summary Form; Website Lighting Design Lab**} The interior lighting power allowance shall be calculated by multiplying the gross interior floor area, in square feet, by the appropriate unit lighting power allowance, in watts per square foot, for the use as specified in Table 15-1. Accessory uses, including corridors, lobbies and toilet facilities shall be included with the primary use.

The lighting power allowance for each use shall be separately calculated and summed to obtain the interior lighting power allowance.

In cases where a lighting plan for only a portion of a building is submitted, the interior lighting power allowance shall be based on the gross interior area covered by the plan. Plans submitted for common areas only, including corridors, lobbies and toilet facilities shall use the lighting power allowance for common areas in Table 15-1.

When insufficient information is known about the specific use of the space, the allowance shall be based on the apparent intended use of the space.

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1532 Exterior Lighting Power Allowance: ^{**CAM 405; Form Lighting Summary Form; Website Lighting Design Lab**} The exterior lighting power allowance shall be calculated separately for (1) covered parking, and (2) outdoor parking, outdoor areas and building exteriors. The lighting in these two areas shall not be traded.

The lighting allowance for covered parking shall be 0.20 W/ft², and the allowance for open parking and outdoor areas shall be 0.15 W/ft². For open parking and outdoor areas and roadways, luminaires mounted above 15 feet shall meet IESNA requirements for Full Cutoff Luminaires.  (Full Cutoff means a luminaire light distribution where zero candela intensity occurs at an angle of 90 degrees above nadir, and all greater angles from nadir.)

The lighting allowance for building exteriors and externally-illuminated signs (including billboards) shall be calculated either by multiplying the building facade area that is illuminated by 0.15 W/ft² or multiplying the building perimeter in feet by 7.5 watts per lineal foot. Any building exterior lighting that exceeds 7.5 watts per lineal foot of total building perimeter is not allowed to be traded with other lighting areas.

EXCEPTIONS:

1. Group U occupancy accessory to Group R-3 or R-4 occupancy.
2. Reserved
3. The top level of a parking garage is allowed to be included with the covered parking garage category provided that the luminaires on the top level meet IESNA requirements for Full Cutoff Luminaires.
4. For the gas station pump area under canopy only, 1.00 W/ft² may be used.  For automobile sales area only, and for other exterior retail sales, including but not limited to gardening supplies, 0.50 W/ft² may be used.

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TABLE 15-1
Unit Lighting Power Allowance (LPA)
^{**CAM 405; Form Lighting Summary Form; Website Lighting Design Lab**}

Footnotes for Table 15-1

1. In cases in which a general use and a specific use are listed, the specific use shall apply. In cases in which a use is not mentioned specifically, the Unit Lighting Power Allowance shall be determined by the building official. This determination shall be based upon the most comparable use specified in the table. See Section 1512 for exempt areas.
   
2. The watts per square foot may be increased, by 2% per foot of ceiling height above 20 feet, unless specifically directed otherwise by subsequent footnotes.
   
3. The watts per square foot of room may be increased by 2% per foot of ceiling height above 12 feet.
   
4. For all other spaces, such as seating and common areas, use the Unit Lighting Power Allowance for assembly.
5. The watts per square foot of room may be increased by 2% per foot of ceiling height above 9 feet.
   
6. See Section 1532 for exterior lighting.
   
7. For conference rooms and offices less than 150 square feet with full-height partitions, a Unit Lighting Power Allowance of 1.20 W/ft² may be used.
   
8. For the fire engine room, the Unit Lighting Power Allowance is 1.00 W/ft².
   
9. For indoor sport tournament courts with adjacent spectator seating, the Unit Lighting Power Allowance for the court area is 2.60 W/ft²provided that there is a manual dimmer or at least two additional steps of lighting control in addition to off.
   
10. Display window illumination installed within 2 feet of the window, provided that the lighting is fitted with LED, tungsten halogen, fluorescent or high intensity discharge lamps and that the display window is separated from the retail space by walls or at least three-quarter-height partitions (transparent or opaque), and lighting for free standing display where the lighting moves with the display are exempt.

    An additional 1.5 W/ft² of merchandise display luminaires are exempt provided that they comply with all three of the following:

    1. located on ceiling-mounted track or directly on or recessed into the ceiling itself (not on the wall),
    2. adjustable in both the horizontal and vertical axes (fluorescent and other fixtures with two points of track attachment are acceptable with vertical axis only),
    3. fitted with LED, tungsten halogen, fluorescent or high intensity discharge lamps.

    The additional lighting power is allowed only if the lighting is actually installed.

11. Provided that a floor plan, indicating rack location and height, is submitted, the square footage for a warehouse may be defined, for computing the interior Unit Lighting Power Allowance, as the floor area not covered by racks plus the vertical face area (access side only) of the racks. The height allowance defined in footnote 2 applies only to the floor area not covered by racks.
    
12. Medical and clinical offices include those facilities, which, although not providing overnight patient care, do provide medical, dental, or psychological examination and treatment. These spaces include, but are not limited to, laboratories and treatment centers.