Appendix a, Us c, Csa marks – Alpha Technologies Radium MiniBay User Manual
Page 55: Nrtl/c
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044-001-C0-00, Rev. C
CSA International (CSA) was established in 1919 as an independent testing laboratory in
Canada. In 1994, OSHA granted CSA Nationally Recognized Testing Laboratory (NRTL)
status in the United States of America. This was extended in 1999. When these marks
appear with the indicator “C and US” or “NRTL/C” it means that the product is certified for
both the U.S. and Canadian markets to the applicable U.S. and Canadian standards.(1)
Argus Rectifier and Power System products bearing the CSA NRTL/C Mark are
certified to CSA C22.2 No. 950 and UL 1950.
As part of the reciprocal U.S./Canada agreement regarding testing laboratories, Standards
Council granted Underwriters Laboratories (UL) authority to certify products manufactured
in the U.S. for sale in Canada.
Only Underwriters Laboratories may grant a license for the use of this mark which indicates
compliance with both Canadian and U.S. requirements. (2)
What are NRTLs and what do they do?
NRTL’s are third party organizations recognized by OSHA, U.S. Department of Labor under the NRTL Program.
The testing and certifications are based on product safety standards developed by the U.S.-based standards
developing organizations and often issued by ANSI.(3)
The NRTL determines that a product meets the requirements of an appropriate consensus based product safety
standard either by successfully testing the product itself, or by verifying that a contract laboratory has done so.
The NRTL certifies that the product meets the requirements of the product safety standard.(4)
When was the NRTL started, and who governs it?
In 198, in a suit brought on by an independent testing laboratory, OSHA
was court ordered to remove specific references to UL (Underwriters
Laboratories) and FRMC (Factory Mutual Research Corporation).
In 1988, OSHA revised its regulations to remove those references and the
NRTL program was established.
The NRTL program is both national and international in scope with foreign
labs permitted. As of Dec. 17, 1998, 17 recognized labs were permitted,
with pending applications from 21 other labs.(5)
References:
Information presented has been developed from the official web sites of the respective organizations. Specific
references are as follows:
(1) www.csa-international.org/english/product_services/index_cert.htm
(2) www.ul.com/mark/ulmark.htm
(3) www.osha-slc.gov/dts/otpca/nrtl/slide02.html
(4) www.osha-slc.gov/dts/optca/nrtl/slide04.html
(5) www.osha-slc.gov/dts/optca/nrtl/slide18.html
CSA Marks
Appendix A
®
NRTL/C
®
C US
®
US
C
®
®
NRTL
Program
OSHA
15 Others
Dec. 17,
1998
NRTL/C