International Organization for Standardization (ISO)
1, rue de Varembé, Case postale 56
CH-1211 Geneva 20, Switzerland

International Electrotechnical Commission (IEC)
3, rue de Varembé
P.O. Box 131
CH - 1211 Geneva 20, Switzerland

Ente Nazionale Italiano di Unificazione (UNI)
via Battistotti Sassi 11B
20133 Milano MI

National Electrical Manufacturers Association (NEMA)
1300 North 17th Street
Suite 1847
Rosslyn, VA 22209

U. S. Food and Drug Administration (FDA)
5600 Fishers Lane
Rockville MD 20857-0001

TÜV Rheinland AG (TÜV)
Am Grauen Stein
51105 Köln - Germany