What is the relationship between the UL Standards for wire and cable and the National Electrical Code?

The large majority of UL's wire and cable Standards are intended to be compatible with the installation requirements of the National Electrical Code (NEC). Some exceptions are boat cable, marine shipboard cable, and appliance wiring material. UL staff devotes significant resources to the development of the NEC, which is published by the National Fire Protection Association (NFPA).

Does an E-number on a product mean that it is UL Listed?

No. The UL E-number is a valid identifier for the organization responsible for a product but not an indication that the product is Listed, Classified, verified or recognized. Only the appropriate UL Mark -- on the wire or cable or on its packaging -- is a valid indication of UL certification. UL assigns a unique E-number (E and a 3- to 6-digit number for wire and cable products) to each applicant in every product category. To find the responsible organization for a product when the E-number has been used for identification, go to UL's Online Certifications Directory, select "Search By UL File Number" and enter the E-number.

Why are ampacity markings not permitted on UL Listed wire and cable, and not shown in UL wire and cable Standards?

The ampacity of a wire or cable is the amount of current that the wire or cable can transmit without exceeding its rated temperature. An ampacity marking on a wire or cable or a reference to a specific ampacity for a wire or cable in a UL wire or cable standard is not feasible since ampacity varies according to the actual conditions under which the cable will operate. These conditions include the ambient temperature, installation environment (e.g., free-air), conduit or directly buried in the earth. The National Electrical Code provides two methods for the cable user to determine ampacity for a cable based on the installation conditions.

What does the term "verified" mean?

The term "verified," when used in a UL marking, means that the product has been tested and complies with one or more specific requirement. These requirements may be safety or performance related.  In the UL system, the words "Classified" and "verified" mean the same thing. For a complete explanation of "Listed," "Classified" and "Recognized," read more on the UL Mark.

What is the best source of information on the intended use of a UL Listed wire or cable product?

The guide information for most of UL's product categories provides valuable information regarding intended use and installation requirements. To view this information, go to UL's Online Certifications Directory. Use the keyword search to determine the links to files that are appropriate. Each file contains an additional link to the guide information.



Learn About the Fastest Growing Safety Certification Mark in North America

What is the difference between the ETL Listed Mark and those issued by our competitors?

Certification marks – like the ETL Listed Mark – demonstrate compliance to the requirements of widely accepted product safety standards, as determined through independent testing and periodic follow-up inspections by an NRTL. It is the quality of customer service and of the capabilities provided by the testing laboratory issuing each certification mark that sets them apart.

Do local inspectors know the ETL Listed Mark?

Yes. Inspectors and the Authorities Having Jurisdiction recognize and accept the ETL Mark as proof of product compliance throughout North America and in some areas of South America.

Will retailers accept my product if it bears the ETL Listed Mark?

Yes. Our product safety certification program includes the same testing, listing, labeling, and follow-up inspection services as competing certification marks (such as UL, CSA, and others), and our lab is accredited by the same organizations, agencies, and regulatory bodies.

What is an NRTL?

A Nationally Recognized Testing Laboratory (NRTL) is an independent laboratory recognized by the Occupational Safety and Health Administration (OSHA) to test products to the specifications of applicable product safety standards. An NRTL's function is to provide independent testing and certification of any electrically operated product.

What is the NRTL Program?

The NRTL Program is operated by OSHA and seeks to ensure that products are safe for use in the U.S. workplace. OSHA's recognition of an NRTL is an acknowledgment of the organization's ability to perform product safety testing and certification within scope.

What does the ETL Mark mean when displayed on my product?

The ETL Listed Mark indicates to distributors, retailers and customers that your product has been tested by Intertek and found in compliance with accepted national standards.

What products bear the ETL Mark?

Intertek provides product safety testing and certification services for companies spanning multiple industries, markets, and applications. For a comprehensive look at which products bear our mark, view our Directory of Listed Products.

What countries accept the ETL Listed Mark?

The ETL Mark is accepted throughout the U.S. and Canada. However, we are an international certification organization authorized to issue these product safety marks and more: NOM Mark, CE Marking, GS Mark, S Mark.

How long has the ETL Listed Mark been around?

ETL has a long history that began in 1896 when Thomas Alva Edison founded Electrical Testing Labs (ETL). Edison’s vision was to provide assurance to consumers through product performance and safety testing. When manufacturers apply Intertek’s ETL Listed Mark to their products, the letters “ETL” carry with them a long history of innovation, influence, and independence.



What Grades of copper do you use in your cable products?

UPG primarily uses Oxygen free bare copper in all its security, fire, data and control products. 

Does UPG use anything other than bare copper?

Yes!  Because of the demand for lower cost, manufactures world-wide started using CCA or Copper Coated Aluminum to reduce cost to the customers. While CCA is becoming very popular in the automotive and some construction type products, caution is expressed because of increased voltage drops.  CCA is very popular in countries other than USA because most cable runs are much smaller and voltage drops are not a concern.

Why does UPG high pot test every Coil Pack, Box or reel of cable? And do other manufactures do the same?

UPG test every box of cable to insure our customer that they can install UPG cable with 100% confidence against manufacturing defect.  Very few manufactures test every reel of cable for construction grade products because of time and money.

Does UPG charge more for 100% tested product and what happens if you do have a defective product?

No, UPG does not charge more. If for any reason you the consumer find a defective material we require the following

What is the UPG Cable Warranty?

We offer a lifetime warranty 100% against manufacturer defects and electrical performance per UL and ETL standards.


You ask!  How can they do this? 

Simple: Along with normal testing required by UL or ETL during and after manufacturing, we take each Box, reel or coil of cable after packaging and high pot-test each conductor with 3,000 peak volts to insure continuity of each conductor.

All Coax Cable is lot sweep-tested and each reel is high pot-tested.

All Category cables are tested for performance value under ETL and UL standards and high pot-tested.

In the event there is an alleged problem UPG would require that we be contacted immediately to report the problem.

  1. All cable must be taken out of the project with a report of the alleged problem.
  2. Cable to be returned to UPG Corp office for testing.

If UPG’s finds the cable to be defective and the cause by manufacturing defect, UPG will cover labor costs and materials to replace the cable.