Letter N

National Electrical Code (NEC ®)® A document revised every three years based upon inputs to and recommendations of volunteer committee members of the
National Fire Protection Association. The intent of the NEC ®,
also called NFPA 70®, is to describe safe electrical practices.
Although the NEC® is an advisory document, its use is often
mandated by state and local building codes.

NEMA Enclosure Type
A designation given to an enclosure based on standards
published by the National Electrical Manufacturers Association.
The NEMA type identifies of the degree of protection provided
by the enclosure.


NEMA Frame Size
A designation that identifies motor dimensions based upon
standards provided by the National Electrical Manufacturers
Association. Motors too large to correspond to NEMA frame
sizes are referred to as above NEMA motors.