Article 409 [Industrial Control Panels] of the National Electrical Code (NEC) has been a part of the Code since the 2005 edition. Industrial control panels are defined in Art. 100. Basically, these ...

Rosslyn, Va.-based National Electrical Manufacturers Association (NEMA) has published KS 3-2010, "Guidelines for Inspection and Preventive Maintenance of Switches Used in Commercial and Industrial ...