(F) Generator Control Wiring Methods
The control conductors shall be protected to resist potential damage by fire or structural failure. Where routed through a building, the conductors shall be protected from fire for 2 hours using one of the following methods:
- The cable or raceway is encased in a minimum 50 mm (2 in.) of concrete.
- The cable or raceway is a listed fire-resistive cable system.
Informational Note No. 1: Fire-resistive cables are tested to ANSI/UL 2196-2017, Standard for Fire Test for Circuit Integrity of Fire-Resistive Power, Instrumentation, Control and Data Cables.
Informational Note No. 2: The listing organization provides information for fire-resistive cable systems on proper installation requirements to maintain the fire rating.
- The cable or raceway is protected by a listed electrical circuit protective system.
Informational Note No. 1: Electrical circuit protective systems could include, but are not limited to, thermal barriers or a protective shaft and are tested in accordance with UI, 1724, Fire Tests for Electrical Circui Protection Systems.
Informational Note No. 2: The listing organization provides information for electrical circuit protective systems on proper installation requirements to maintain the fire rating.