The National Electrical Manufacturers Association’s (NEMA) standard for distribution equipment recently received approval from the American National Standards Institute (ANSI). ANSI/NEMA KS 3-2010, "Guidelines for Inspection and Preventive Maintenance of Switches Used in Commercial and Industrial Applications," includes safety procedures, general guidance, inspection procedures, preventive maintenance, non-destructive test procedures, and the operation of accessory devices. KS 3 identifies switches requiring maintenance or replacement. When appropriately maintained, switches can provide reliable protection for many years. Regular inspection and preventive maintenance help ensure that a high level of protection is provided to personnel and electrical equipment.
ANSI/NEMA KS 3, "Guidelines for Inspection and Preventive Maintenance of Switches Used in Commercial and Industrial Applications," can be downloaded at no charge. A hard copy may be purchased for $61 by visiting global.ihs.com or by contacting IHS at 800-854-7179 (U.S. only) or 303-397-7956 (international).