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Green > International Energy Conservation Code 2006

Excerpt from International Energy Conservation Code® relevant to Lighting Systems
Purchase the 2006 IECC Book

505.2 Lighting Contols (Mandatory)

505.4 Exit signs. (Mandatory)

505.5 Interior lighting power requirements. (Prescriptive)

505.6 Exterior lighting. (Mandatory)

SECTION 505 ELECTRICAL POWER AND LIGHTING SYSTEMS (Mandatory)

505.1 General. (Mandatory). This section covers lighting system controls, the connection of ballasts, the maximum light-ing power for interior applications, and minimum acceptable lighting equipment for exterior applications.

Exception: Lighting within dwelling units.

505.2 Lighting controls. (Mandatory). Lighting systems shall be provided with controls as required in Sections 505.2.1, 505.2.2 , 505.2.3 and 505.2.4.

505.2.1 Interior lighting controls. Each area enclosed by walls or floor-to-ceiling partitions shall have at least one manual control for the lighting serving that area. The required controls shall be located within the area served by the controls or be a remote switch that identifies the lights served and indicates their status.
Exceptions:

  1. Areas designated as security or emergency areas that must be continuously lighted.
  2. Lighting in stairways or corridors that are elements of the means of egress.

505.2.2 Additional controls. Each area that is required to have a manual control shall have additional controls that
meet the requirements of Sections 505.2.2.1 and 505.2.2.2.

505.2.2.1 Light reduction controls. Each area that is required to have a manual control shall also allow the occupant to reduce the connected lighting load in a reasonably uniform illumination pattern by at least 50 per-cent. Lighting reduction shall be achieved by one of the following or other approved method:

  1. Controlling all lamps or luminaries;
  2. Dual switching of alternate rows of luminaries, alternate luminaries or alternate lamps;
  3. Switching the middle lamp luminaries independently of the outer lamps; or
  4. Switching each luminaire or each lamp.

Exceptions:

  1. Areas that have only one luminaire.
  2. Areas that are controlled by an occupant-sensing device.
  3. Corridors, storerooms, restrooms or public lobbies.
  4. Sleeping unit (see Section 505.2.3).
  5. Spaces that use less than 0.6 watts per square foot (6.5 W/m2).

505.2.2.2 Automatic lighting shutoff. Buildings larger than 5,000 square feet (465 m2) shall be equipped with an automatic control device to shut off lighting in those areas. This automatic control device shall function on either:

  1. A scheduled basis, using time-of-day, with an independent program schedule that controls the
    interior lighting in areas that do not exceed 25,000 square feet (2323 m2) and are not more than one floor; or
  2. An occupant sensor that shall turn lighting off within 30 minutes of an occupant leaving a space; or
  3. A signal from another control or alarm system that indicates the area is unoccupied.

Exception: The following shall not require an automatic control device:

  1. Sleeping unit (see Section 505.2.3).
  2. Lighting in spaces where patient care is directly provided.
  3. Spaces where an automatic shutoff would endanger occupant safety or security.

505.2.2.2.1 Occupant override. Where an automatic time switch control device is installed to comply with Section 505.2.2.2, Item 1, it shall incorporate an override switching device that:

  1. Is readily accessible.
  2. Is located so that a person using the device can see the lights or the area controlled by that switch, or so that the area being lit is annunciated.
  3. Is manually operated.
  4. Allows the lighting to remain on for no more than 2 hours when an override is initiated.
  5. Controls an area not exceeding 5,000 square feet (465 m2).

Exceptions:

  1. In malls and arcades, auditoriums, single-tenant retail spaces, industrial facilities and arenas,where captive-key override is utilized, override time may exceed 2 hours.
  2. In malls and arcades, auditoriums, single-tenant retail spaces, industrial facilities and arenas, the area controlled may not exceed 20,000 square feet (1860 m2).

505.2.2.2.2 Holiday scheduling. If an automatic time switch control device is installed in accordance with Section 505.2.2.2, Item 1, it shall incorporate an automatic holiday scheduling feature that turns off all loads for at least 24 hours, then resumes the normally scheduled operation.

Exception: Retail stores and associated malls, restaurants, grocery stores, places of religious worship and theaters.

505.2.3 Sleeping unit. Sleeping units in hotels, motels, boarding houses or similar buildings shall have at least one master switch at the main entry door that controls all permanently wired luminaries and switched receptacles, except those in the bathroom(s). Suites shall have a control meeting these requirements at the entry to each room or at the primary entry to the suite.

505.2.4 Exterior lighting controls. Lighting for all exterior applications shall have automatic controls capable of turning off exterior lighting when sufficient daylight is available or when the lighting is not required during nighttime hours. Lighting not designated for dusk-to-dawn operation shall be controlled by an astronomical time switch. Lighting designated for dusk-to-dawn operation shall be controlled by an astronomical time switch or photo sensor. Astronomical time switches shall be capable of retaining programming and the time setting during loss of power for a period of at least 10 hours.

Exception: Lighting for covered vehicle entrances or exits from buildings or parking structures where required for safety, security, or eye adaptation.

505.3 Tandem wiring. (Mandatory). The following luminaries located within the same area shall be tandem wired:

  1. Fluorescent luminaries equipped with one, three or odd-numbered lamp configurations, that are recess-mounted within 10 feet (3048 mm) center-to-center of each other.
  2. Fluorescent luminaries equipped with one, three or any other odd-numbered lamp configuration, that are pendant- or surface-mounted within 1 foot (305 mm) edge-to-edge of each other.

Exceptions:

  1. Where electronic high-frequency ballasts are used.
  2. Luminaries on emergency circuits.
  3. Luminaries with no available pair in the same area.

505.4 Exit signs. (Mandatory). Internally illuminated exit signs shall not exceed 5 Watts per side.

505.5 Interior lighting power requirements. (Prescriptive). A building complies with this section if its total connected
lighting power calculated under Section 505.5.1 is no greater than the interior lighting power calculated under Section 505.5.2.

505.5.1 Total connected interior lighting power. The total connected interior lighting power (watts) shall be the sum of the watts of all interior lighting equipment as determined in accordance with Sections 505.5.1.1 through 505.5.1.4.

Exceptions: The connected power associated with the following lighting equipment is not included in calculating total connected lighting power.

  1. Specialized medical, dental and research lighting.
  2. Professional sports arena playing field lighting.
  3. Display lighting for exhibits in galleries, museums and monuments.
  4. Sleeping unit lighting in hotels, motels, boarding houses or similar buildings.
  5. Emergency lighting automatically off during normal building operation.

505.5.1.1 Screw lamp holders. The wattage shall be the maximum labeled wattage of the luminaire.

505.5.1.2 Low-voltage lighting. The wattage shall be the specified wattage of the transformer supplying the system.

505.5.1.3 Other luminaries. The wattage of all other lighting equipment shall be the wattage of the lighting equipment verified through data furnished by the manufacturer or other approved sources.

505.5.1.4 Line-voltage lighting track and plug-in busway. The wattage shall be the greater of the wattage of the luminaries determined in accordance with Sections 505.5.1.1 through 505.5.1.3 or 30 W/linear foot (98W/lin m).

505.5.2 Interior lighting power. The total interior lighting power (watts) is the sum of all interior lighting powers for all areas in the building covered in this permit. The interior lighting power is the floor area for each building area type listed in Table 505.5.2 times the value from Table 505.5.2 for that area. For the purposes of this method, an “area” shall be defined as all contiguous spaces that accommodate or are associated with a single building area type as listed in Table 505.5.2. When this method is used to calculate the total interior lighting power for an entire building, each building area type shall be treated as a separate area.

TABLE - INTERIOR LIGHTING POWER ALLOWANCES

 
LIGHTING POWER DENSITY  
 
Building Area Type  
  
(Watts per sq foot)  
  
Building Area Type  
  
(Watts per sq foot)  
 
Automotive Facility  
  
0.9  
  
Multi-Family  
  
0.7  
 
Convention Center  
  
1.2  
  
Museum  
  
1.1  
 
Court House  
  
1.2  
  
Office  
  
1.0  
 
Dining: Bar Lounge/Leisure  
  
1.3  
  
Parking Garage  
  
0.3  
 
Dining: Cafeteria/Fast Food  
  
1.4  
  
Penitentiary  
  
1.0  
 
Dining: Family  
  
1.6  
  
Performing Arts Theater  
  
1.6  
 
Dormitory  
  
1.0  
  
Police/Fire Station  
  
1.0  
 
Exercise Center  
  
1.0  
  
Post Office  
  
1.1  
 
Gymnasium  
  
1.1  
  
Religious Building  
  
1.3  
 
Healthcare-Clinic  
  
1.0  
  
Retail  
  
1.5  
 
Hospital  
  
1.2  
  
School/University  
  
1.2  
 
Hotel  
  
1.0  
  
Sports Arena  
  
1.1  
 
Library  
  
1.3  
  
Town Hall  
  
1.1  
 
Manufacturing Facility  
  
1.3  
  
Transportation  
  
1.0  
 
Motel  
  
1.0  
  
Warehouse  
  
0.8  
 
Motion Picture Theater  
  
1.2  
  
Workshop  
  
1.4  

Table Notes:

In cases where both a general building area type and a more specific building area type are listed, the more specific building area type shall apply.

Where lighting equipment is specified to be installed to highlight specific merchandise in addition to lighting equipment specified for general lighting and is switched or dimmed on circuits different from the circuits for general lighting, the smaller of the actual wattage of the lighting equipment installed specifically for merchandise, or 1.6 Watts per square foot times the area of the specific display but not to exceed 50% of the floor area, or 3.9 Watts per square foot times the actual case or shelf area for displaying and selling jewelry, china or silver, shall be added to the interior lighting power determined in accordance with this line item.

505.6 Exterior lighting. (Mandatory). When the power for exterior lighting is supplied through the energy service to the building, all exterior lighting, other than low-voltage landscape lighting, shall comply with Sections 505.6.1 and 505.6.2.

Exception: Where approved because of historical, safety, signage or emergency considerations.

505.6.1 Exterior building grounds lighting. All exterior building grounds luminaries that operate at greater than 100 watts shall contain lamps having a minimum efficacy of 60 lumens per watt unless the luminaire is controlled by a motion sensor or qualifies for one of the exceptions under Section 505.6.2.

505.6.2 Exterior building lighting power.The total exterior lighting power allowance for all exterior building applications is the sum of the individual lighting power allowances based on the densities permitted in Table 505.6.2 for these applications plus an additional unrestricted allowance of 5 percent of that sum. Tradeoffs are allowed only among exterior lighting applications listed in Table LIGHTING POWER DENSITIES FOR BUILDING EXTERIORS in the Tradable Surfaces section. Exterior lighting for all applications (except those included in the exceptions to Section 505.6.2) shall comply with the requirements of Section 505.6.1.

Exceptions: Lighting used for the following exterior applications is exempt when equipped with a control device independent of the control of the nonexempt lighting:

  1. Specialized signal, directional, and marker lighting associated with transportation;
  2. Advertising signage or directional signage;
  3. Integral to equipment or instrumentation and is installed by its manufacturer;
  4. Theatrical purposes, including performance, stage, film production and video production;
  5. Athletic playing areas;
  6. Temporary lighting;
  7. Industrial production, material handling, transportation sites, and associated storage areas;
  8. Theme elements in theme/amusement parks; and
  9. Used to highlight features of public monuments and registered historic landmark structures or buildings.

TABLE - LIGHTING POWER DENSITIES FOR BUILDING EXTERIORS

 
Tradable Surfaces (Lighting Power Densities for uncovered parking areas, building grounds, building entrances and exits, canopies and overhangs, and outdoor sales areas may be traded.)  
 
 APPLICATIONS    LIGHTING POWER DENSITIES  
 
     
Uncovered Parking Areas    
Parking Lots and drives    0.15 Watts per square foot  
Building Grounds    
Walkways less than 10 feet wide    1.0 watts/linear foot  
Walkways 10 feet wide or greater, plaza areas and special feature areas    0.2 Watts per square foot  
Stairways    1.0 Watts per square foot  
Building Entrances and Exits    
Main entries    30 watts/linear foot of door width  
Other doors    20 watts/linear foot of door width  
Canopies and Overhangs    
Canopies (free standing & attached and overhangs)    1.25 Watts per square foot  
Outdoor Sales    
Open areas (including vehicle sales lots)    0.5 Watts per square foot  
Street frontage for vehicle sales lots in addition to “open area” allowance    20 watts/linear foot  
 
Non tradable Surfaces (Lighting Power Density calculations for the following applications can be used only for the specific application and cannot be traded between surfaces or with other exterior lighting. The following allowances are in addition to any allowance otherwise permitted in the Tradable Surfaces section of this table.)  
Building facades    0.2 Watts per square foot for each illuminated wall or surface or 5.0 Watts/linear foot for each illuminated wall or surface length  
Automated teller machines and night depositories    270 watts per location plus 90 watts per additional ATM per location  
Entrances and gatehouse inspection stations at guarded facilities    1.25 Watts per square foot of uncovered area (covered areas are included in the Canopies and Overhangs section of Tradable Surfaces)  
Loading areas for law enforcement, fire, ambulance and other emergency service vehicles    0.5 Watts per square foot of uncovered area (covered areas are included in the Canopies and Overhangs section of Tradable Surfaces)  
Drive-up windows at fast food restaurants    400 watts per drive-through  
Parking near 24-hour retail entrances      800 watts per main entry  

 

  
   
   
   
 
     
   
 
 
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