690.12 Rapid Shutdown of PV Systems on Buildings.

Rapid Shutdown is not required for PV equipment and circuits installed on non-enclosed detached structures including but not limited to parking shade structures, carports, solar trellises, and similar structures.
Click to Enlarge
Rapid Shutdown is not required for PV equipment and circuits installed on non-enclosed detached structures including but not limited to parking shade structures, carports, solar trellises, and similar structures.

Code Change Summary: A new exception was added to the rapid shutdown requirements in 690.12.

In the 2023 NEC®, a public input was accepted to provide relief from the rapid shutdown (RSD) requirements in 690.12 for PV system circuits installed on or in buildings where first responders are not likely to employ rooftop ventilation or rescue operations.

New exception 2 under Section 690.12 states that PV equipment and circuits installed on non-enclosed detached structures including but not limited to parking shade structures, carports, solar trellises, and similar structures shall not be required to comply with 690.12.

This code change aligns with similar language in Section 1205.2 of the International Fire Code (IFC) below:

IFC 1205.2 Access and pathways. Roof access, pathways and spacing requirements shall be provided in accordance with Sections 1205.2.1 through 1205.3.3. Pathways shall be over areas capable of supporting fire fighters accessing the roof. Pathways shall be located in areas with minimal obstructions, such as vent pipes, conduit or mechanical equipment.

Exceptions:

  1. Detached, nonhabitable Group U structures including, but not limited to, detached garages serving Group R-3 buildings, parking shade structures, carports, solar trellises and similar structures.
  2. Roof access, pathways and spacing requirements need not be provided where the fire code official has determined that rooftop operations will not be employed.

Below is a preview of the NEC®. See the actual NEC® text at NFPA.ORG for the complete code section. Once there, click on their link to free access to the 2023 NEC® edition of NFPA 70.

2020 Code Language:

690.12 Rapid Shutdown of PV Systems on Buildings. PV system circuits installed on or in buildings shall include a rapid shutdown function to reduce shock hazard for firefighters in accordance with 690.12(A) through (D).

Exception: Ground-mounted PV system circuits that enter buildings, of which the sole purpose is to house PV system equipment, shall not be required to comply with 690.12.

2023 Code Language:

690.12 Rapid Shutdown of PV Systems on Buildings. PV system circuits installed on or in buildings shall include a rapid shutdown function to reduce shock hazard for firefighters in accordance with 690.12(A) through (D).

Exception No. 1: Ground-mounted PV system circuits that enter buildings, of which the sole purpose is to house PV system equipment, shall not be required to comply with 690.12.

Exception No. 2: PV equipment and circuits installed on nonenclosed detached structures including but not limited to parking shade structures, carports, solar trellises, and similar structures shall not be required to comply with 690.12.

Did You Like This? Let Us Know With A Like! Thanks!

690.12 Rapid Shutdown of PV Systems on Buildings.

Below is a Real Question from our Electrical Continuing Education Courses for Electrical License Renewal:

Based on the 2023 NEC code changes in 690.12, which of the following is true of the rapid shutdown requirements?

A: PV systems on non-enclosed detached parking structures require Rapid Shutdown.
B: Rapid Shutdown is not required for PV equipment and circuits installed on non-enclosed parking shade structures.
C: PV systems on non-enclosed carports require Rapid Shutdown.
D: PV systems on non-enclosed solar trellises require Rapid Shutdown.
Please register or sign in for electrical continuing education courses.

If you were already signed in, your session probably expired, please sign back in.