National Electrical Manufacturers Association
1300 North 17th Street
Suite 1847
Rosslyn, Virginia  22209
www.nema.org

IEC Central Office
3, rue de Varembé
P.O. Box 131
CH - 1211 GENEVA 20
Switzerland
Phone: +41 22 919 02 11
Fax: +41 22 919 03 00
www.iec.ch

Underwriters Laboratories Inc.
333 Pfingsten Road
Northbrook, IL 60062-2096 USA
Phone: +1-847-272-8800
Fax: +1-847-272-8129
www.ul.com

ISO Central Secretariat
International Organization for Standardization (ISO)
1, rue de Varembé, Case postale 56
CH-1211 Geneva 20, Switzerland
www.iso.org

IEEE Corporate Office
3 Park Avenue, 17th Floor
New York, New York
10016-5997 U.S.A.
Tel: +1 212 419 7900
Fax: +1 212 752 4929 
www.ieee.org