UL - 3741 BULLETIN
UL Standard for Safety Photovoltaic Hazard Control
|Publication Date:||30 July 2018|
Fire fighters performing operations involving buildings with attached Photovoltaic (PV) arrays may be exposed to electrical hazards from damaged PV equipment. These requirements for PV Hazard Control components, equipment and systems provide a reduced level of shock hazard from energized PV system equipment and circuits located within the PV array after the operation of any required hazard control initiation function.
This standard is based on the presupposition that the PV array is installed by qualified persons in accordance with the installation instructions and all applicable installation codes and standards. Evaluation to this standard should not replace other requirements addressing the control of power source(s) for the purposes of worker safety during installation or maintenance. Energized circuits can remain in some PV array equipment after any required hazard control initiation function is operated.
NOTE: Requirements for PV arrays addressed in this standard are intended for compliance with the National Electrical Code (NEC), NFPA-70, requirements for controlling electrical shock hazards inside the array boundary as addressed in NEC section 690.12(B)(2), Rapid Shutdown of PV Systems on Buildings and with the Canadian Electrical Code (CEC) C22.1.