• Codes
  • Features

    Features Overview

    Go to features
    Reference

    Reference.

    A reliable and up-to-date source of codes.
    Research

    Research.

    Rapidly and efficiently calculate project parameters.
    Collaboration

    Collaboration.

    Get everyone on the same page and streamline code research.
    Workflows
    Architects General Contractor Building Official & Plans Examiner Inspectors Owner Subcontractors Code Consultants
  • Pricing
  • Login
  • Sign Up
Sign Up
Login
  • Code Library
  • Features
  • Pricing
  • About
  • Careers
  • Help
  • Contact
  • Terms
  • Privacy
Sign Up
Upgrade to Premium
Code calculators: Code Calculators automatically generates a detailed list of requirements.
REFERENCE
Amendment Styling
Industry-leading search
Suggested code sections
Code diagrams
RESEARCH
Code calculators
Filter by topic
Code compare
Code sheet exports
COLLABORATION
Team projects
Bookmarks
Comments
START 2 WEEK FREE TRIAL
Have an account? Sign in
// CODE SNIPPET

505.2.2 Additional Controls

2012 North Carolina Energy Conservation Code > 5 Commercial Energy Efficiency > 505 Electrical Power and Lighting Systems (Mandatory) > 505.2 Lighting Controls (Mandatory) > 505.2.2 Additional Controls
JUMP TO FULL CODE CHAPTER
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 percent. Lighting reduction shall be achieved by one of the following or other approved method:

  1. Controlling all lamps or luminaires;
  2. Dual switching of alternate rows of luminaires, alternate luminaires or alternate lamps;
  3. Switching the middle lamp luminaires 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

AMENDMENT
This section has been amended at the state or city level.

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

AMENDMENT
This section has been amended at the state or city level.

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 shall be permitted to exceed 2 hours.
  2. In malls and arcades, auditoriums, single-tenant retail spaces, industrial facilities and arenas, the area controlled shall not exceed 20,000 square feet (1860 m2).

505.2.2.2.1 Building Automatic Lighting Controls

AMENDMENT
This section has been amended at the state or city level.
Buildings larger than 5,000 square feet (465 m2) shall be equipped with an automatic control device to shut off lighting. This automatic control requirement shall be achieved by one or a combination of the following:
  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 (2,323 m2) and are not more than one floor;
  2. A signal from another control or alarm system that indicates the area is unoccupied; or
  3. An occupancy sensor that automatically turns lighting off within 30 minutes of an occupant leaving a space.

    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.
    4. Spaces with daylight control zones that have automatic daylighting controls using either continuous or stepped control systems.
    5. Lighting intended for 24-hour operation.
    6. Tenant spaces less than 2,000 square feet complying with Section 505.2.2.2.2.

505.2.2.2.2 Holiday Scheduling

AMENDMENT
This section has been amended at the state or city level.

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.

505.2.2.2.2 Occupancy Sensors

AMENDMENT
This section has been amended at the state or city level.
All buildings shall have occupancy sensors in all of the following spaces:
  1. Classrooms;
  2. Conference/meeting rooms;
  3. Employee lunch and break rooms;
  4. Private offices;
  5. Storage rooms over 100 square feet; and
  6. Computer rooms over 100 square feet.

505.2.2.2.3 Occupant Override

AMENDMENT
This section has been amended at the state or city level.
Where an automatic time switch control device is installed to comply with Section 505.2.2.2.1, 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 captivekey override is utilized, override time shall be permitted to exceed 2 hours.
    2. In malls and arcades, auditoriums, single-tenant retail spaces, industrial facilities and arenas, the area controlled shall not exceed 20,000 square feet (1860 m2).

505.2.2.2.4 Holiday Scheduling

AMENDMENT
This section has been amended at the state or city level.
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.

505.2.2.3 Daylight Zone Control

AMENDMENT
This section has been amended at the state or city level.

Daylight zones, as defined by this code, shall be provided with individual controls that control the lights independent of general area lighting. Contiguous daylight zones adjacent to vertical fenestration 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 skylights more than 15 feet (4572 mm) from the perimeter shall be controlled separately from daylight zones adjacent to vertical fenestration.

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

Related Code Sections


505.2.2 Commercial Energy Efficiency, 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 ...
2012 North Carolina Energy Conservation Code > 5 Commercial Energy Efficiency > 505 Electrical Power and Lighting Systems (Mandatory) > 505.2 Lighting Controls (Mandatory) > 505.2.2 Additional Controls
424.64 Equipment for General Use, Limit Controls
or circuits. In addition, an integral independent supplementary control or controllers shall be provided in each duct heater that disconnects ...
2017 North Carolina Electrical Code > 4 Equipment for General Use > 424 Fixed Electric Space-Heating Equipment > 424.64 Limit Controls
425.64 Equipment for General Use, Limit Controls
or circuits. In addition, an integral independent supplementary control or controllers shall be provided in each duct heater that disconnects ...
2017 North Carolina Electrical Code > 4 Equipment for General Use > 425 Fixed Resistance and Electrode Industrial Process Heating Equipment > 425.64 Limit Controls
503.4.3.3.1 Commercial Energy Efficiency, Temperature Dead Band
Hydronic heat pumps connected to a common heat pump water loop with central devices for heat rejection and heat addition shall have controls ...
2012 North Carolina Energy Conservation Code > 5 Commercial Energy Efficiency > 503 Building Mechanical Systems > 503.4 Complex HVAC Systems and Equipment. (Prescriptive) > 503.4.3 Hydronic Systems Controls > 503.4.3.3 Hydronic (Water Loop) Heat Pump Systems > 503.4.3.3.1 Temperature Dead Band
C403.4.2.3.1 [CE] Commercial Energy Efficiency, Temperature Dead Band
Hydronic heat pumps connected to a common heat pump water loop with central devices for heat rejection and heat addition shall have controls ...
2018 North Carolina Energy Conservation Code > 4 [CE] Commercial Energy Efficiency > C403 Building Mechanical Systems > C403.4 Hydronic and Multiple-Zone HVAC Systems Controls and Equipment. (Prescriptive) > C403.4.2 Hydronic Systems Controls > C403.4.2.3 Hydronic (Water Loop) Heat Pump Systems > C403.4.2.3.1 Temperature Dead Band
Help Contact Us Privacy Terms
Shared projects
Shared projects
Projects provide a dedicated space to collaborate on code research.
Code diagrams
Code diagrams
Unpack the code through illustrations and descriptions.
Code sheet exports
Code sheet exports
Generate a code sheet that integrates with your drawing set.
Code Compare
Code Compare
Highlight differences between any two building codes.
Search
Search
Don't miss relevant code. Quickly locate sections across your jurisdiction.
View thousands of relevant UL Certified products and assemblies that help achieve code compliance
View thousands of relevant UL Certified products and assemblies that help achieve code compliance
Access to UL product and system certification information.
Code Calculators
Code Calculators
Code calculators automatically generate a detailed list of requirements.
UpCodes Premium
Leverage the most sophisticated code compliance platform.
TRY FREE FOR TWO WEEKS VISIT PRICING
Join the waitlist
We are looking to gauge the level of interest in linking UL product and system certification information alongside related code sections.

Let us know your email and we’ll ping you once it’s ready! Learn more.

Thank you for your interest!

If you’re open to it, we would love to jump on the phone to make sure we’re building this in the best way possible for your workflow. Any insight or advice would be greatly appreciated. We’ve sent you an email with a calendar link to book at time with us.


Cancel
Get Early Access
UpCodes Premium
Leverage the full code compliance platform.
START 2 WEEK FREE TRIAL LEARN MORE