North American NEMA – USA, Canada, Mexico standard – an overview
The relevant standards are ANSI / UL 498 and UL 60601 for the USA and CSA CAN C22.2 No. 21 and CSA CAN C22.2 No 42 for Canada, which are in addition to the normal UL817 and Canadian standards. As with our standard North American products, approval is by Underwriters Laboratories in the US and the Canadian Standards Association in Canada. There is no medical standard in Mexico and other countries that use the North American type plug, but hospital grade leads may be specified and used.
Hospital grade sockets are made to stricter manufacturing tolerances, to prevent accidental disconnection. The plugs have double-insulated inserts, and solid pins (not folded metal) which are usually nickel plated, for more reliability especially for the ground connection. There must be a strain relief for the plug, to stop its cable being forcibly pulled out, which makes the plugs bigger.
Generally, the plugs are also built for increased strength, durability and reliability, even after a high number of plugging-in and unplugging cycles. Another measure is resistance to corrosion and damage from the liquids and chemicals that may be encountered in the healthcare environment.
Whilst not a requirement, the plugs are sometimes made from a clear or blue-tinted transparent material in order to check the internal wiring is correct; another popular colour is solid non-transparent grey, or black.
Contact our friendly technical team for more information call us on 01264 353489 or click here to contact us