Lighting Control Code Update: 2018 IECC
It seems like only a couple of months ago that designers, contractors and inspectors in the state of Colorado were settling into the 2015 IECC code changes. Just as dimming, daylight harvesting, site lighting reduction and vacancy sensing were becoming routine, the International Code Council released the 2018 IECC. Never a dull moment in the construction industry!
Do not fear, Coloradoans – the city of Denver and the state of Colorado have not released any indication that they will be adopting this code anytime soon. It is unlikely that Denver will adopt since 2015 was just adopted last year, but it never hurts to educate ourselves on where things will be headed in the future.
Below is our overview of the major changes in the 2018 IECC as it relates to lighting control systems. Please contact us with any and all feedback on this review, as we always love a good code discussion here at Visual Integration
1. NEW: Luminaire level lighting controls (LLLC). New language in the code provides detail on the OPTION to use fixture-integrated controls.
- Occupancy sensors to brighten/dim based on occupancy.
- Ambient sensor to brighten/dim based on available daylight.
- Bright/dim setpoints, timeouts, fade rates, sensitivities, and wireless zoning must be configurable.
2. NEW: Occupant sensor controls now required in open offices. C405.2.1.3.
- General lighting controlled separately in control zones with floor areas not greater than 600SF.
- Turn off within 20-minutes after space is unoccupied.
- Reduce light output by not less than 80% (sweeping off does comply).
- Daylight sensors will only activate once occupancy sensors turn lights on.
3. CHANGE: Occupant sensor timeout minimum is now 20-minutes (previously 30-minutes). C405.2.1.1.
4. NEW: Exception for daylight-responsive controls. C405.2.3.
- New buildings where the total connected lighting power allowance equation: LPAadj = LPAnorm x (1.0 – 0.4 x UDZFA/TBFA). RE: C405.2.3 for full equation and information.
- New adjusted lighting power allowance equation: LPAadj = LPAnorm x (1.0 – 0.4 x UDZFA/TBFA). RE: C405.2.3 for full equation and information.
5. NEW: Daylight control functions. C405.2.3.1.
- When we have daylight controls in offices, classrooms, labs, library reading rooms – must dim continuously down to 15% output or lower.
- Daylight controls must be able to completely shut off all controlled lights.
6. NEW: Special applications controls. C405.2.4.
- Display & accent lighting must be controlled via time-switch or occupant controls.
- Task lighting must be controlled via time-switch or occupant controls.
- Lighting that is for sale or for education must be controlled via time-switch or occupant controls.
- Sleeping units shall have occupant sensor controls to sweep off fixtures and controlled receptacles within 20-minutes of vacancy.
- Dwelling units shall comply with C405.2.1.1 (occupancy sensors) or C405.2.2.2 (timeswitch controls).
- Non-visual lighting (plant grown/food warming) shall have timeswitch controls independent from other lighting in the space.
7. NEW: Exterior decorative lighting shutoff. Façade and landscape lighting shall automatically shutoff 1-hour after business closing to 1-hour before business opening.