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NSF’s Electrical Conduit Listing Program Grows to Over 200 Products

Over the last decade, NSF has been testing and certifying electrical conduit products against industry standards such as UL 651, CSA C22.2 No. 211.1, CSA C22.2 No. 211.2 and NEMA TC 2. Recently, we added PVC foam core pipe and high-density polyethylene pipe and tubing to our original listing offering of PVC solid wall conduit pipe and fittings.

This rapid growth has led to increased recognition of NSF electrical certification marks in the regulatory landscape in both the United States and Canada. The acceptance of NSF’s listed and labeled electrical products is widespread and is based on NSF’s designation as a Nationally Recognized Testing Laboratory (NRTL) by OSHA and as an accredited testing laboratory for electrical safety by the Standards Council of Canada (SCC).

Manufacturers with NSF electrical conduit certification have expressed very high levels of satisfaction with the acceptance of their electrical conduit products in the field. This peace of mind, combined with NSF’s client-focused approach, lab expertise, competitive pricing and efficient turnaround times, has made NSF an unmatched choice for manufacturers seeking electrical conduit certification.

“Getting our electrical conduit certification through NSF not only allowed us to break into new markets, but we were also able to consolidate our costs by working with one certification body across our entire product portfolio,” said Alain Leroux, Technical Services Manager at IPEX Management. “NSF provides excellent service – their staff is always accessible and knowledgeable, which helped streamline our conduit certification process.”

Initial certification of electrical conduit products consists of testing to an applicable standard (see table below) and an initial audit of the production facility. The listing maintenance program consists of periodic retesting and four unannounced audits of the production facility. Compared to other certifiers, this audit schedule reduces the number of plant interruptions while ensuring the necessary certification requirements are being met.

CSA C22.2 No. 327HDPE conduit, conductors-in-conduit, and fittings
CSA C22.2 211.1Rigid types EB1 and DB2/ES2 PVC conduit
CSA C22.2 211.2Rigid PVC (unplasticized) conduit
NEMA TC 2Electrical Polyvinyl Chloride (PVC) Conduit
NEMA TC 3Polyvinyl Chloride (PVC) Fittings for Use with Rigid PVC Conduit and Tubing
NEMA TC 6 and 8Polyvinyl Chloride (PVC) Plastic Utilities Duct for Underground Installations
UL 651Schedule 40, 80, Type EB and A Rigid PVC Conduit and Fittings
UL 651ASchedule 40 and 80 High Density Polyethylene (HDPE) Conduit

Products certified by NSF for electrical conduit end use in the U.S. are marked with either the NSF® NRTL or NSF® Electrical marks.

For example, a product certified to UL 651 could be marked either:

Electrical UL 651

Or, products certified for both the U.S. and Canada carry the cNSFus mark, as shown in the example below:

cNSFus mark

If you see these marks in the field, you can be sure that the product was tested and certified by the most respected organization in the industry. For more information, contact

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