ElectricalInformation

-- BobVitale? - 27 Aug 2007

Electrical Plug Table

Voltage Current type Name Notes
120 VAC 15 amp straight blade NEMA 5-15 Std grounded wall plug with straight shaped neutral hole
120 VAC 20 amp straight blade NEMA 5-20 Std grounded wall plug with T-shaped neutral hole
120 VAC 30 amp straight blade NEMA 5-30 Std grounded wall plug with L-shaped neutral
         
208 VAC 15 amp locking L6-15 wall plug with blades turned 90deg, (horizontal)
208 VAC 20 amp locking L6-20 blades turned 90deg, with T-shaped neutral hole
208 VAC 30 amp locking L6-30 blades turned 90deg, with L-shaped neutral hole

Generally BSOE specs NEMA 5-20 outlets for new construction when possible. NEMA 5-30 should be replaced with locking type plugs when used. Higher power, such as 208 VAC outlets should also be specified with locking type plugs when possible. Locking plugs give a higher degree of safety since it becomes harder to inadvertently pull the plug from the receptacle.

Drawings

Straight Bladed 120 & 208/240 volt connectors
http://www.stayonline.com/reference-nema-straight-blade.aspx

Electrical Plug Connections Wiring References

From Sun - lists some standard 208/240VAC connections
http://sunsolve.sun.com/handbook_private/Devices/Wiring_Dgms/WIR_AC_Power.html

Wikipedia NEMA Electrical Connector Info
http://en.wikipedia.org/wiki/NEMA_connector