NEMA ICS 3.1:2009 (R2014)

This guide applies to AC medium-voltage contactors and Class E controllers rated 1,501-15,000 volts, installed in accordance with the National Electrical Code (NEC), NFPA 70 and the manufacturer's instructions. The requirements in the CANENA-developed UL 347 and NEMA SG 10-2008 apply. These instructions are not considered appropriate to industrial control equipment intended for use in locations designated as hazardous (classified) in the National Electrical Code. This guide was developed in response to the many questions from the user public and has been developed from the experience of the member companies working with their customers and users. It provides information that will be useful to architects, electrical engineers, electrical contractors, maintenance engineers, and others who are responsible for the installation of this equipment. It is not intended to replace the manufacturer's instructions and does not purport to cover all possible circumstances arising from the application, handling, storage, and installation of this equipment. Any problems or questions should be discussed with the manufacturer. Note -Extension of the voltage range in UL 347 to extend up to 15 Kv is under consideration.