NEMA 1 Plug/Receptacle Information
All devices in the NEMA 1 category are UNGROUNDED featuring two wires (neutral and hot) rated up to 125V. The standard NEMA 1 configuration is the 1-15P which features two parallel flat blades, 6.35mm wide and 1.524mm thick. The NEMA 1-15P is commonly used in small double-earthed appliances that do not require grounding such as clocks, radios, chargers, and other small household appliances. NEMA 1-15R Receptables have been banned from new development in the United States since 1962, however many older buildings and houses still have 1-15R receptacles. The NEMA 1-15P will mate with a NEMA 5-15R, the grounded version of the 1-15R.
The NEMA 1-15P is a 2 Wire 2 Blade ungrounded plug rated at 125V and 15 Amps in North America. The use of NEMA 1-15R (the receptacle matching the 1-15P) is discontinued in new home installations in the U.S (since 1962). NEMA 1-15P are compatible with the NEMA 5-15R outlet.
NEMA 2 Plug/Receptacle Information
The NEMA 2 Standard is now absolete. NEMA 2 Devices are 2 WIRE (hot-hot) ungrounded devices rated up to 250V. The only NEMA 2 devices are in production are used for repair purposes.
NEMA 5 Plug/Receptacle Information
THE NEMA 5 standard specifies three wire (hot-neutral-ground), two blade one ground pin, grounded devices. Never remove the ground pin to force a three prong plug to fit into a 2 prong outlet. (i.e don't make a 5-15 into a 1-15). Doing so will result in loss of ground and may result in loss of line/neutral polarity.
The NEMA 5-15P is a 3 Wire grounded plug featuring two blades (can be equal or unequal widths due to the ground pin forcing polarity) and one ground pin rated up to 125V AC and 15 Amps. The NEMA 5-15P is your standard household plug used for to connect small appliances such as TV's, Microwaves, hairdryers, etc to a wall outlet. The NEMA 5-15P is compatible with a Nema 5-20R T-Slot outlet, which is commonly found in new home installations.
The NEMA 5-20P is a 3 Wire grounded plug featuring two blades and one ground pin rated up to 125V AC and 20 Amps. The NEMA 5-20P is used in applications that require higher power draw such as large refrigerators, space heaters,large kitchen mixers, etc. The 5-20R T-SLot receptacle allows you to plug in either a 5-20P or a 5-15P plug, allowing greater flexibility. In modern home installations, 5-20R T-Slot receptacles are often used when 20A circuits are installed due to flexibility of being downward compatable with the 5-15P.
NEMA 6 Plug/Receptacle Information
THE NEMA 6 standard specifies three wire (hot-hot-ground) grounded wiring devices featuring two blades and one ground pin rated up to 250V. NEMA 6 Devices are used in 208V and 240V circuits, depending on if the building has three-phase or split-phase power supply.
The NEMA 6-15P is a 3 Wire grounded plug featuring two blades and a ground pin, rated up to 250V AC and 15 Amps. The NEMA 6-15P has two, horizontal blades on the top of the plug spaced 23⁄32" center to center and a ground pin spaced between the two on the bottom of the plug.
The NEMA 6-20P is a 3 Wire grounded plug featuring two blades and one ground pin rated up to 250V AC and 20 Amps. The NEMA 6-20P has one horizontal blade and one vertical blade and mates with a 6-20R Outlet.
NEMA 7 Plug/Receptacle Information
The NEMA 7 Standard defines 3 wire, 2 pole grounded wiring devices rated for 277V AC and up to 50 amps depending on the configuration. The standard includes the NEMA 7-15, NEMA 7-20, NEMA 7-30, and NEMA 7-50.
NEMA 10 Plug/Receptacle Information
THE NEMA 10 standard has been deprecated and its now generally replaced by the NEMA 14-30R and NEMA 14-50R for large home appliances. The NEMA 10 Standard defined 125/250V Unground (hot-hot-neutral) wiring devices, and relied upon the appliance to be indirectly grounded using a strap connected to the neutral. NEMA 10 devices can still be found in older appliances, however, this method of grounding is no longer valid since the 1996 Edition of the National Electric Code (NEC)
NEMA 14 Plug/Receptacle Information
THE NEMA 14 wiring devices are four wire grounded devices with (hot-hot-neutral-ground) wiring configuration rated 250V between 15A and 60A. NEMA 14 devices allow for both 120V and 240V circuits when supplied by a split-phase power supply and 120V or 208V when supplied by a three-phase power supply. The most common NEMA 14 devices are the NEMA 14-30 and NEMA 14-50. THE NEMA 14-30 is commonly used in electric dryers and large home appliances. The NEMA 14-50 is becoming popular in the Electric Car charging industry, which Telsa recommends installing for home charging use. the 14-50 is also commonly found in RV Parks where they are used to power large recreational vehicles.
NEMA L5 Plug/Receptacle Information
THE NEMA L5 standard specifies three wire (hot-neutral-ground), two blade one ground pin, grounded devices rated up to 125V.
The NEMA L5-15P is a 3 Wire 3 Blade grounded plug featuring 3 Blades arranged in a tight circular pattern rated up to 125V AC and 15 Amps.. The plug locks to the connector by twisting into place. Locking cords are typically used in industrial applications to ensure that accidental power loss does not occur due to a loose connection.
The NEMA L5-20P is a 3 Wire 3 Blade grounded plug featuring three blades arranged in a circular pattern, rated up to 125V AC and 20 Amps. The NEMA L5-20P's blades are further separated than the NEMA L5-15P and is used in applications that require high amperage such as industrial/professional appliances. The locking feature prevents the plug from accidental disconnecting from the outlet, preventing power loss.
NEMA L6 Plug/Receptacle Information
THE NEMA L6 standard specifies three wire (hot-hot-ground), three blade grounded wiring devices rated up to 250V. Standard nominal supply voltages are 240V or 208V depending on the phase configuration. The L6 Standard does not provide a neutral wire. These connectors are commonplace in Rack PDUS, Industrial Equipment, and large power tools such as welders.
The NEMA L6-15P is a 3 Wire 3 Blade grounded wiring device rated up to 250V AC and 15 Amps.
THE NEMA L6-20P is a 3 Wire 3 Blade grounded device with hot-hot-ground wiring and is rated up to 250V AC and 20 Amps.
The NEMA L6-30P is a 3 Wire 3 Blade grounded device with hot-hot-ground wiring and is rated up to 250V AC and 30 Amps.