Changes to Mandatory Title 24 Lighting Requirements
Bill Blackley LCDirector Product Marketing
California's new building energy efficient standards took effect July 2014. The goal is to make nonresidential buildings 30% more energy efficient than the previous 2008 standards.Thisbrief presentation gives an overview of the important requirements ands major updates to the lighting code
Changes to Mandatory Title 24 Lighting Requirements
New requirements for lighting controls initiates one of the biggest changes to Title 24 standards.The new standard also includes stricter requirements for testing and certification of controls commissioning.All lighting control systems with two or more components in non-residential spaces must meet the requirements of 2013 Title 24 standardssection 110.9.Stand-alone and luminaire integrated lighting controls such as occupancy/vacancy sensor and photocontrols must now comply withTitle 20regulations.
Changes to Mandatory Title 24 Lighting RequirementsNon Residential Indoor Lighting Requirements
All interior luminaire in non-residential buildings must have manual on/off controls.Each area must be independently controlled.Dimmer switches must allow manual on/off functionality with some exceptions such as public restrooms with two or more stalls, which do not need a publicly available switch.
Changes to Mandatory Title 24 Lighting RequirementsMulti-Level Lighting Controls
In areas larger than 100ft² installed luminaires must:Incorporate multi-level lighting controls or continuous dimming depending on the lamp type.Meet uniformity levels as perTable 130.1AHave at least one of the following types of controls for each luminaireManual continuous dimming and on/off control(Section 130.1(a))Lumen maintenance(Section 100.1)Tuning(Section 100.1)Automatic daylighting controls(Section 130.1(d))Demand response controls(Section 130.1(e))
Note:Classroom lighting is one of the rare exceptions to multi-level requirements. Instead, if they have a connected general lighting load <0.7W/ft² they must have at least one control step between 30% and 70% of full rated power.
Changes to Mandatory Title 24 Lighting RequirementsAutomatic Daylighting Controls
Insection 140.3(c)of the 2008 code only 50% of the floor area in buildings over 8,000 ft² was required to be in daylighting zones.Section 130.1(d)of the 2013 code requires that floor plans have 75% of their total area in daylighting zones in building greater than 5000 ft².In daylighting zones controls requirements have become more exacting. In the 2008 code only sky-lit spaces>2,500 ft² and side lit spaces 250 ft² had to have daylighting controls.Section 130.1(d)requires multi-level automatic daylighting controls in all Sky-lit or Side-lit zones where the installed general lighting power is>120W
Changes to Mandatory Title 24 Lighting RequirementsOccupancy Lighting Controls
Section 119 requires occupancy sensing lighting controls in the following areas:Offices<250 ft²Conference rooms of any sizeMultipurpose rooms<1000 ft²Classrooms of any sizeSecondary spacesIndoor parking areas
Note:Indoor parking areas including parking garages and secondary spaces are new additions to the code
Changes to Mandatory Title 24 Lighting RequirementsSecondary Spaces
The 2013 code demands that occupancy sensing controls must automatically reduce lighting power by 50% in these secondary spaces when unoccupied:Corridors and StairwellsWarehouse aisles and open areasLibrary book shelve aisles>10ft in length accessible from one end or>20ft in length accessible from both ends
Changes to Mandatory Title 24 Lighting RequirementsSecurity and Egress Lighting
Maximum security egress lighting allowance of 0.2W/ft²bwhen building is occupied.General and egress lighting must be shut off during unoccupied times.Exception:Offices are allowed up to 0.05W/ft² for lighting during unoccupied periods onlyalong emergency egress areas designated on the building plans
Changes to Mandatory Title 24 Lighting RequirementsTable 130.1-A
Changes to Mandatory Title 24 Lighting RequirementsDemand Response Controls
The 2013 code requires that all non-residential buildings>10,000 ft² be capable of automatically responding to a DR signal so that:Total energy use for lighting can automatically drop to a level at least 15% below the buildings maximum total lighting power.Lighting is reduced in a manner consistent with requirements of uniformity levels as perTable 130.1-A
Note:Non habitable spaces must not be used to comply with this requirement, spaces with a lighting power density<0.5W/ft² are not counted toward the buildings total lighting power. Designers remain responsible for specifying automated controls that are compatible with the local utilities DR protocol
In Title 24 parking garages are classified as indoor spaces and must comply withSection 130.1(c)7B. Top level roof areas are the exception, these must comply withSection 130.2. The following regulations are new for parking garages.In parking garages, indoor parking areas, loading and unloading areas, general lighting must be controlled by occupancy sensing controls having at least one control step between 20% & 50% of design lighting power.In a parking garage area with a combined total of 36 ft² or more glazing or opening luminaires providing general lighting, combined in primary and secondary daylit side-lit zones must be controlled independently with automatic photocontrols.Automatic daylighting controls must be multi-level continuous dimming or on/off.When primary side-lit zones receive sufficient daylight to reach Illuminance levels above 150% of that provided by electric lighting when no daylight is available, controls must reduce lighting power to zero
Changes to Mandatory Title 24 Lighting RequirementsParking Garages & Areas
Changes to Mandatory Title 24 Lighting RequirementsOutdoor Lighting Requirements
Outdoor lighting must be circuited and independently controlled from other electric loads.All outdoor luminaires with lamps>150W must comply with the IES BUG system for assessing and limiting uplight and GLARE.No backlight requirements in this iteration of the code
Changes to Mandatory Title 24 Lighting RequirementsAutomatic daylighting controls
Title 24 2008 required photocontrol devices for all outdoor lighting. In addition to photocontrols the 2013 standards require automatic scheduling controls. Astronomical time clocks that automatically turn lights off during the day are allowed as and alternative to photocontrols.Section 130.2(c)addresses these requirements
Changes to Mandatory Title 24 Lighting RequirementsLuminaires mounted <24ft above the ground
In addition to photocontrols and automatic schedulingSection 130.2(c)also requires occupancy sensing for certain outdoor lighting applications. No more than 1,500W of lighting power may be controlled together for outdoor lighting of this type. Automatic lighting controls for these luminaires must:Utilize lotion sensors or another automatic lighting control system, in addition to photocontrols and automatic scheduling controls for astronomical clocks.Be capable of automatically reducing the lighting power of each luminaire by at least 40% but not more than 80% or provide continuous dimming through a range that includes 40-80% during vacant periods.Switch on automatically when the area becomes occupied.ExceptionsThese types of lighting constitute exceptions to the above requirementsPole mounted luminaires with a maximum rated wattage of 75WNon pole mounted luminaires with a maximum rated wattage of 30WLinear lighting with a maximum wattage of 4W per linear foot of luminaireOutdoor sales, frontage, lots and canopies
Changes to Mandatory Title 24 Lighting RequirementsOutdoor Sales Lighting
The 2013 code adds Occupancy sensing controls to the requirements for outdoor sales lighting for frontage areas, lots and canopies. Lighting controls in these areas must meet the requirements that apply to all outdoor lighting and they must automatically:Reduce lighting power by at least 40% but not more than 80% during vacant periodsSwitch to the higher lighting level when the pace becomes occupied.
Changes to Mandatory Title 24 Lighting RequirementsBuilding facades ornamental hardscape and outdoor dining areas
Like outdoor sales areas these areas must have lighting controls that reduce energy use during unoccupied periods and automatically increase light levels when the space becomes occupied. One or both of the following controls strategies are allowed:Motion sensors capable of automatically reducing lighting power by at least 40% but not more than 80% during vacant periodsA centralized time based zone lighting control capable od automatically reducing lighting power by at least 50%
Note:Wall packs identified by the IES handbook as outdoor wall mounted luminaires having bilaterally symmetric distribution must comply with the acceptable requirements inSection 130.2(c)3where the bottom of the luminaire is mounted<24ft above the ground.
Changes to Mandatory Title 24 Lighting RequirementsCommissioning & Acceptance Testing Requirements
Title 24 now requires that a commissioning report be completed and provided to each building owner. This includes reports on all functional performance tests completed as part of the acceptance test process.Projects issued a building permit must undergo acceptance testing for:Automatic daylighting controlsAutomatic time switch controlsOccupancy sensorsOutdoor lighting shut off controlsOutdoor motion sensorsDemand response (DR) controls
Note:Testing of DR controls is a new requirement under Title 24 2013. Building commissioning requirements are addressed in Section 120.8Lighting controls acceptance test technicians must be certified through an approved training program such as theCalifornia Advanced Lighting Controls Training Program (CALCTP)and registered with the State of California. Technician employers must also be certified. Technician training and certification requirements are addressed inSection 13.11 (page 1049)of the non-residential compliance manual.