Black NEMA 5-20P to Locking L5-30R Straight to Locking Adapter Cords is designed to adapt a standard straight blade connector to a twist locking version. Be cautious of adapting locking to straight blade plugs, as the manufacturer likely used the locking plug to prevent against un intentional unplugging. If your plug is used in a high traffic area the unplugging of an operating machine can damage the equipment or operators.
NEMA 5-20P
General Information:
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 compatible with the 5-15P.
What does a NEMA 5-20P Connect to?
 |  | The NEMA 5-20 Plug connects to both the NEMA 5-20R Connector and the NEMA 5-15/5-20R Wall Outlet. The connector is commonly found on Extension cords, and the NEMA 5-15/5-20R Wall Outlet is the standard power supply outlet in all residential and commercial construction in North America. |
NEMA L5-30R Twist-Lock
General Information:
NEMA L5-30R is rated up to 125VAC and 30A. This connector couples with the L5-30P and locks into place preventing nuisance disconnection. This feature makes it popular in commercial and industrial settings where there is high traffic. This connector is common in the L5-30 Extension Cord Series where it is used to extend power from a L5-30R wall receptacle or connector to a certain location for convenience.
What does the NEMA L5-30R connect to?
 | The NEMA L530R Locking Connector is designed to be twisted into a locking position with the NEMA L5-30P Locking Plug. This plug is commonly found on higher powered devices that are used in buildings where standard 125V power supply is present, in a location where there is high traffic. |
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