NSF SE 31765 – Certification for Large-Diameter PVC Electrical Conduit
Special Engineered specification for large-diameter PVC electrical conduit. Supporting infrastructure innovation with trusted third-party certification.
What is NSF SE 31765?
PVC electrical conduit is traditionally certified to UL 651, covering sizes from ½” to 6”. However, larger applications—such as wind and solar farms, power generation, and infrastructure projects—require conduit sizes up to 12 inches.
NSF SE 31765 is a special engineered specification developed to evaluate PVC conduit in sizes 8 to 12 inches, extending the reliability and safety standards of UL 651.
Specification highlights
SE 31765 – Designed for large-scale applications.
Follows the general requirements of UL 651 but provides guidance for evaluating larger sizes.
- Defines outer diameter and wall thickness.
- Includes tensile strength, impact, and crush resistance.
- Specifies material, marking, and quality control requirements.
Approval and compliance
The Authority Having Jurisdiction (AHJ) is responsible for approving alternate technologies. Third-party certification to NSF SE 31765 provides a credible basis for this approval.
View SE 31765 listings on NSF.org
NSF accreditations for electrical safety
NSF is a Nationally Recognized Testing Laboratory (NRTL) by OSHA for UL 651 and other electrical and fire safety standards.
NSF’s certification program is accredited by:
- ANSI National Accreditation Board (ANAB)
- A2LA (for NSF laboratories)
- International Accreditation Service (IAS)
- Standards Council of Canada (SCC).
Get certified or learn more
NSF SE 31765 is part of NSF’s broader scope of plastic piping standards testing and certification under NSF/ANSI 14. This includes rigorous evaluation of plastic piping systems used in:
- Electric and utility conduits
- Potable and non-potable water applications
- Heating and cooling systems
- Fire safety infrastructure
- And more.
NSF Electrical Conduit Certifications
Learn more about our certification program for electrical conduit.
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