NEMA (National Electrical Manufacturers Association)
 
NEMA is the leading trade association in the U.S. representing the interests of electrical industry manufacturers of products used in the generation, transmission and distribution, control, and end-use of electricity.

NEMA provides a forum for the standardization of electrical equipment, enabling consumers to select from a range of safe, effective, and compatible electrical products. NEMA publishes over 500 standards.

 
NEMA electrical motor starters refer to a standardized rating system for the electrical performance of the most common style of American-built motor starters.
NEMA starters are rated by size:
00, 0, 1, 2, 3, 4, 5, 6 and 7.

To select a NEMA starter only horsepower and voltage are needed. NEMA starters have interchangeable heater elements and makes NEMA starters attractive in projects where the motor specification is not known until the start-up date.
 
Maximum Horsepower (hp)
NEMA Size NEMA Continuous Amp Rating
(Amp)		 Full Voltage Starting Part Winding Starting Wye Delta Starting
200V 230V 460V 575V 200V 230V 460V 575V 200V 230V 460V 575V
00 9 1 1/2 1 1/2 2            
0 18 3 3 5            
1 27 7.5 7.5 10 10 10 15 10 10 15
2 45 10 15 25 20 25 40 20 25 40
3 90 25 30 50 40 50 75 40 50 75
4 135 40 50 100 75 75 150 60 75 150
5 270 75 100 200 150 150 350 150 150 300
6 540 150 200 400   300 600 300 350 700
7 810   300 600   450 900 500 500 1,000


TYPE 4 ENCLOSURES
Type 4 enclosures are intended for indoor or outdoor use primarily to provide a degree of protection against windblown dust and rain, splashing water, and hose-directed water; and to be undamaged by the formation of ice on the enclosure. They are not intended to provide protection against conditions such as internal condensation or internal icing.

TYPE 4X ENCLOSURES
Type 4X enclosures are intended for indoor or outdoor use primarily to provide a degree of protection against corrosion, windblown dust and rain, splashing water, and hose-directed water; and to be undamaged by the formation of ice on the enclosure. they are not intended to provide protection against conditions such as internal condensation or internal icing.

TYPE 12 ENCLOSURES
Type 12 enclosures are intended for indoor use primarily to provide a degree of protection against circulating dust, falling dirt, and dripping non-corrosive liquids. They are not intended to provide protection against such conditions as internal condensation. COMPARISON BETWEEN NEMA ENCLOSURE TYPE NUMBERS AND IEC ENCLOSURE CLASSIFICATION DESIGNATIONS

Electrical panels,  code requirements, switch gear,  transformers, lighting ballasts, most common Wiring Diagram No.1 for NEMA Receptacle Configurations 

The National Electrical Code, GFI receptacles, grounding rods and cold water pipe grounding.   Repairs and replacements of under cabinet lights, front  lawn post lights and area flood lights such as high pressure sodium and medal halide.  Electrical safety inspections main lug panel, cadmium connectors, MC wire, SER cable, SEU cable, twist-lock Philadelphia, PA, receptacle charts, wiring diagrams, GFI, receptacles, grounding rods, Commercial, Industrial, cadmium connectors, MC wire, SER cable, SEU cable, twist-lock, grounding, We are installers.  The National Electrical Manufacturers Association, NEMA.

 
     
Information obtained from ANSI/NEMA WD-6 standard. Face and pin sizes not necessarily to scale. For reference only.
 
   
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