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North American Non-Locking NEMA Configurations

The NEMA  (National Electrical Manufacturers Association) pattern and numbering system is made up of four main identifiers. The first identifier can be a blank space or have the letter L. This determines whether it is a straight or locking blade device. The second identifier is a number. The first number in a NEMA listing determines the voltage rating. The third identifier is a number and identifies the amperage rating of the device. The fourth identifier is a letter. This identifier determines whether the device is a plug, P, or a receptacle/outlet, R.The North American Non-locking NEMA Configuration chart will help you determine the correct NEMA configuration for your North American applications.

Use this chart to determine which general purpose NEMA plug or receptacle is needed for specific applications.

  2 Pole 2-Wire 2 Pole 3-Wire Grounding 3 Pole 3-Wire 3 Pole 4-Wire Grounding 4-Wire
  125V 250V 125V 250V 277V 125/
250V
3ø 250V 125/
250V

250V
3ø 120/
208V
15A Receptacle    
15A
Plug
 
20A Receptacle  

20A

Plug

30A Receptacle  
30A
Plug
50A Receptacle    
50A
Plug
   
60A Receptacle              
60A
Plug
             
Information obtained from ANSI/NEMA WD-6 standard. Face and pin sizes not necessarily to scale. For reference only.