What do letters NEMA mean, as in NEMA configuration for plugs and receptacles?

Frank (cinkerf)

Frank,

NEMA is:
National Electrical Manufacturers Association

Website at: http://www.nema.org

Co. motto=
'we make the widget's, and the codes to sell em'

Frank,

You'll find NEMA standards for various kinds of equipment. Motor starters are given in Size 0, 1, 2, ect. Disconnects, and the buss ratings in panelboards are all given in NEMA standard sizes.

HMEL #688