Guide to NSF Electrical Certification Marks and Labels
Guide to NSF Electrical Certification Marks
The NSF certification mark is your assurance that the product has been tested and certified by one of the most respected Nationally Recognized Test Laboratories (NRTLs) in existence today. The mark is recognized and valued by consumers, manufacturers, retailers and regulatory agencies worldwide.
Reference the below guidelines for NSF’s electrical and fire safety certification marks.
Certification Mark Appearance Guidelines
Color
The NSF electrical marks below may be reproduced in black, blue, white/reverse or text-only. These marks all have equal meaning. The different colors or text variations may be used to accommodate the background color the mark is being printed on or the design software being used.
Blue Option | Black Option | White/Reverse Option | Text Option |
|---|---|---|---|
 |  |  | NSF® <Standard Designation> |
Orientation
The mark can be shown with the text positioned below or to the right of the circle containing “NSF.” The text may be shown with or without a box around it – either is acceptable.
Canadian and United States Designations
 |  |  |
| Certified for the United States only. | Certified for Canada only. | Certified for Canada and the United States. |
Electrical Mark Types
Mark Type | Example | |
|---|---|---|
| Electrical | | |
| Electrical Component |  | |
| Fire Safety |  | |
| Electrical Conduit |  |  |
NSF Electrical Field Evaluation Labels
Product certification or component recognition is not always an option, like in the cases of custom installations or one-off designs. In those instances, a field evaluation may be a suitable alternative to show compliance to the Authority Having Jurisdiction (AHJ). In addition to the NSF Field Evaluation Label, a report detailing the evaluation and inspection of the product is provided. NSF Electrical Field Evaluation Labels are only applied by an NSF representative directly onto the investigated product.
Note: These labels are not certification marks.
Prior NSF Electrical Field Evaluation Label | Current NSF Electrical Field Evaluation Label |
|---|---|
 |  |
| Both labels shown here are valid. |
How NSF Can Help You
What’s New with NSF
iNADO Partners with NSF to Support Members and Athletes
May 27, 2026iNADO is pleased to welcome NSF’s expertise and experience in support of its members and the athletes they serve
NSF Ends UK’s Three-Year Testing Gap with REG 31 Testing Designation
May 20, 2026NSF’s Oakdale laboratory becomes the UK’s sole facility offering comprehensive BS 6920 and REG 31 testing, closing a critical drinking water safety gap.
Tangent® Materials Announces Industry First: Tangent PolySheet™ CB Earns Certification to NSF 537, Becoming the First PFAS-Free NSF Standard 51 Food Equipment Material
May 20, 2026New food-grade synthetic cutting-board sheet, engineered from the ground up without per- and polyfluoroalkyl substances (PFAS), establishes a new materialsafety benchmark for food-contact and food-equipment applications.
NSF Expands Food Equipment Portfolio with Electrical Safety Testing and Certification
April 30, 2026Manufacturers now have a “one-stop-shop” for both sanitation and electrical safety certification, enabling market expansion and regulatory compliance.