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Applied Research Laboratories, Inc. (ARL) (recognition terminated effective 1/28/08) | ![](http://www.osha.gov/dts/otpca/nrtl/images/arllog2_sm.gif) | The abbreviation "NRTL" must
% v2 p- z* X& J5 w7 e+ Tappear below the ARL mark. |
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Canadian Standards Association (CSA) | ![](http://www.osha.gov/dts/otpca/nrtl/images/CSA_125NRTL.JPG) | ![](http://www.osha.gov/dts/otpca/nrtl/images/CSA_125NRTL_C.JPG) |
| ![](http://www.osha.gov/dts/otpca/nrtl/images/CSA_125US.JPG) | ![](http://www.osha.gov/dts/otpca/nrtl/images/CSA_125C-US.JPG) |
| Marks above used for products meeting only U.S. standards | Marks above used for products meeting both U.S. and Canadian standards |
| ![](http://www.osha.gov/dts/otpca/nrtl/images/CSA_Gas_US.JPG) | |
| Mark above used for gas-fueled products meeting U.S. standards[sup]2[/sup] | |
Canadian Standards Association (CSA)(mark formerly used by the American Gas Association (AGA), exclusively licensed to CSA until June 30, 2001) | ![](http://www.osha.gov/dts/otpca/nrtl/images/aga-ias.gif) | |
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Communication Certification Laboratory, Inc. (CCL) | ![](http://www.osha.gov/dts/otpca/nrtl/images/logo.gif) | |
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Curtis-Straus LLC (CSL) | Marks below used for products meeting only U.S. standards (see note) | Mark below used for products meeting both U.S. and Canadian standards (see note) |
| ![](http://www.osha.gov/dts/otpca/nrtl/images/CSL_US.jpg) | ![](http://www.osha.gov/dts/otpca/nrtl/images/CSL_C-US.jpg) |
Original mark (use allowed until May 1, 2010) | ![](http://www.osha.gov/dts/otpca/nrtl/images/csl_logo.gif) | |
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Electrical Reliability Services, Inc. (ERS)& m6 ?1 d/ e+ S1 j
(also known as eti Conformity Services and formerly Electro-Test, Inc. (ETI)) (recognition terminated effective 6/23/08) | ![](http://www.osha.gov/dts/otpca/nrtl/images/etinrtl_sm.gif) | |
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Entela, Inc. x9 ?- R! ~1 e+ L. Z
(Voluntary termination effective 1/28/08 - acquired by the parent company of ITSNA) | Entela marks are now being used by ITSNA. See ITSNA marks below. |
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FM Global Technologies LLC (FM) (also known as FM Approvals and formerly Factory Mutual Research Corporation) | Mark below used for products meeting only U.S. standards | Mark below used for products meeting both U.S. and Canadian standards |
| ![](http://www.osha.gov/dts/otpca/nrtl/images/FMApproved_BW.jpg) | ![](http://www.osha.gov/dts/otpca/nrtl/images/FMApprovedCUS.jpg) |
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Intertek Testing Services NA, Inc. (ITSNA) (formerly ETL Testing Laboratories, Inc.) | Marks below used for products meeting only U.S. standards | Marks below used for products meeting both U.S. and Canadian standards |
| ![](http://www.osha.gov/dts/otpca/nrtl/images/ETLr.jpg) | ![](http://www.osha.gov/dts/otpca/nrtl/images/ETL-USC.jpg) |
| ![](http://www.osha.gov/dts/otpca/nrtl/images/ETL-US.jpg) | |
| ![](http://www.osha.gov/dts/otpca/nrtl/images/WHI.jpg) | ![](http://www.osha.gov/dts/otpca/nrtl/images/WHI-USC.jpg) |
| ![](http://www.osha.gov/dts/otpca/nrtl/images/WHI-US.jpg) | |
(Note: In 2004, Entela, Inc., was acquired by the parent company of ITSNA.) | ![](http://www.osha.gov/dts/otpca/nrtl/images/entela2_sm.gif) | ![](http://www.osha.gov/dts/otpca/nrtl/images/entela1_sm.gif) |
| Mark above used for products meeting only U.S. standards | Mark above used for products meeting both U.S. and Canadian standards |
|
MET Laboratories, Inc. (MET) | ![](http://www.osha.gov/dts/otpca/nrtl/images/met-listed.jpg) | ![](http://www.osha.gov/dts/otpca/nrtl/images/met-c.jpg) |
| | ![](http://www.osha.gov/dts/otpca/nrtl/images/met-listed-c.jpg) |
| Mark above used for products meeting only U.S. standards Commenced use - January 2006) | Marks above used for products meeting both U.S and Canadian standards (Commenced use - January 2006) |
| | ![](http://www.osha.gov/dts/otpca/nrtl/images/metnrt1.gif) |
| | Mark above used for products meeting both U.S. and Canadian standards (original MET mark) |
|
NSF International (NSF) | Mark below used for products meeting only U.S. standards
4 X& |3 N/ M, [" uUse to expire 12/31/2012 | Mark below used for products meeting both U.S. and Canadian standards
: l$ G4 B" k0 d5 P% J% [) ]Use to expire 12/31/2012 |
| ![](http://www.osha.gov/dts/otpca/nrtl/images/nsf1mark.jpg) | ![](http://www.osha.gov/dts/otpca/nrtl/images/nsf2mark.jpg) |
| Mark below used for products meeting only U.S. standards | Mark below used for products meeting both U.S. and Canadian standards |
| ![](http://www.osha.gov/dts/otpca/nrtl/images/nsf3mark.jpg) | ![](http://www.osha.gov/dts/otpca/nrtl/images/nsf4mark.jpg) |
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National Technical Systems, Inc. (NTS) | ![](http://www.osha.gov/dts/otpca/nrtl/images/nts.gif) | |
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SGS U. S. Testing Company, Inc. (SGSUS) (formerly U.S. Testing Company, Inc.) | ![](http://www.osha.gov/dts/otpca/nrtl/images/ustc_01.gif) | |
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Southwest Research Institute (SWRI) | ![](http://www.osha.gov/dts/otpca/nrtl/images/l_llog1.gif) | |
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TUV America, Inc. (TUVAM) | | Use to commence in early 2008 (see note) |
| ![](http://www.osha.gov/dts/otpca/nrtl/images/tuvam-new-small.jpg) | ![](http://www.osha.gov/dts/otpca/nrtl/images/tuv2008.jpg) |
|
TUV Product Services GmbH (TUVPSG) | | Use to commence in early 2008 (see note) |
| ![](http://www.osha.gov/dts/otpca/nrtl/images/tuvam-new-small.jpg) | ![](http://www.osha.gov/dts/otpca/nrtl/images/tuv2008.jpg) |
|
TUV Rheinland of North America, Inc. (TUV) | ![](http://www.osha.gov/dts/otpca/nrtl/images/TUVus.jpg) | ![](http://www.osha.gov/dts/otpca/nrtl/images/cTUVus.jpg) |
| Mark above used for products meeting only U.S. standards | Mark above used for products meeting both U.S. and Canadian standards |
| ![](http://www.osha.gov/dts/otpca/nrtl/images/tuv.gif) | |
| NRTL previously used mark above but ceased authorizing on or about January 2000. | |
|
Underwriters Laboratories Inc. (UL) | | |
| Marks below used for products meeting only U.S. standards | Marks below used for products meeting both U.S. and Canadian standards |
[size=-1]Basic marks | ![](http://www.osha.gov/dts/otpca/nrtl/images/ul.gif) | ![](http://www.osha.gov/dts/otpca/nrtl/images/ulcus.gif) |
[size=-1]Equivalent to above | ![](http://www.osha.gov/dts/otpca/nrtl/images/ullist.gif) | ![](http://www.osha.gov/dts/otpca/nrtl/images/cuslist.gif) |
[size=-1]"Used on products which UL has evaluated for specific properties, a limited range of hazards, or suitability for use under limited or special conditions. Typically, products Classified by UL fall into the general categories of building materials and industrial equipment." Examples: fire doors, protective gear for fire fighters, industrial trucks. | ![](http://www.osha.gov/dts/otpca/nrtl/images/ulclass.gif) | ![](http://www.osha.gov/dts/otpca/nrtl/images/cusclass.gif) |
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Wyle Laboratories (WL) | ![](http://www.osha.gov/dts/otpca/nrtl/images/wylenr.gif) | |