Historical
NEMA CB 1:2000
Brushes for electrical machines
Provides definitions, dimensions and tolerances, test procedures for physical properties, and test procedures for shunt connections for brushes used in the electrical manufacturing industry. Included are carbon, carbon graphite, graphite, electrographite, metal graphite, metal impregnated and resin-bonded brushes.
NEMA: National Electrical Manufacturers Association [nema]