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    Locking Plugs

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    15A 125V Locking Plug, 2 Pole, 3 Wire

    $29.99
    SKU: ATO-LP5-15
    Electrical locking plug with 125V rated voltage has 2 pole and 3 wire grounding, 15Apm rated current, NEMA 15 plug type. Assembly screws with steel zinc and plated, terminal screws is brass.

    15A 125V Locking Receptacle, 2 Pole, 3 Wire

    $54.21
    SKU: ATO-BL5-15R
    Wholesale price 15 amp 125V locking receptacle for sale online. This twist lock receptacle is a socket uses a twist method with the plug to establish safety connection, with 2 pole 3 wire grounding.

    15A 250V Locking Plug, 2 Pole, 3 Wire

    $29.99
    SKU: ATO-LP6-15
    15 amp 250 volt electric locking plug with thermoplastic back cover, 2 pole and 3 wire grounding, designed with black-beige color and super tough nylon, selectable male plug and female plug. It is commercial application and manufacturer direct sale.

    15A 250V Locking Receptacle, 2 Pole, 3 Wire

    $54.21
    SKU: ATO-BL6-15R
    Factory price 15 amp 250V locking receptacle for sale online. This twist lock receptacle is a socket uses a twist method with the plug to establish safety connection, with 2 pole 3 wire grounding.

    20A 125V Locking Plug, 2 Pole 3 Wire

    $29.99
    SKU: ATO-LP5-20
    Twist locking plug with 20A rated current, 125V rated voltage, 2 pole 2 wire grounding, optional male plug and female plug. It is high quality and lightweight at low price.

    20A 125V Locking Receptacle, 2 Pole, 3 Wire

    $54.41
    SKU: ATO-BL5-20R
    Factory price 20 amp 125V locking receptacle, with 2 pole 3 wire grounding. This twist lock receptacle is a socket uses a twist method with the plug to establish safety connection.

    20A 125V/ 250V Locking Plug, 3 Pole 4 Wire

    $35.99
    SKU: ATO-L14-20P
    20A electrical locking plug with and 3 pole and 4 wire, 125V and 250V rated voltage. It is made of high quality nylon and full copper. The dielectric voltage withstand is 18000V minimum. Male plug and female plug with low price for your choices.

    20A 250V Locking Plug, 2 Pole 3 Wire

    $34.59
    SKU: ATO-LP6-20
    ATO electrical locking plug for sale at economical price, 20A rated current 250V rated current, 2 pole and 3 wire grounding, male plug and female plug available. It is widely used for medical devices, electronics, generators and lifts.

    20A 250V Locking Receptacle, 2 Pole, 3 Wire

    $54.41
    SKU: ATO-BL6-20R
    Economical price 20 amp 250V locking receptacle, with 2 pole 3 wire grounding for industrial or commercial settings. This twist lock receptacle is a socket uses a twist method with the plug to prevent the plug from accidentally disconnecting from the receptacle.

    20A 277V/480V Locking Plug, 4 Pole 5 Wire

    $49.99
    SKU: ATO-L22-20
    Electrical locking plug with 4 pole and 5 wire, 20A rated current, 277V/ 480V rated current, male plug and female plug for you. This twist locking plug comes with nylon and full copper, and the dielectric voltage withstand is 18000V minimum.

    20A 347V/ 600V Locking Plug, 4 Pole 5 Wire

    $53.99
    SKU: ATO-L23-20
    Low price electrical locking plug for sale online, 20 amp rated current, 347V/ 600V rated voltage, optional male and female plug. Its wiring and connecting is 4 pole and 5 wire grounding.

    20A 480V Locking Plug, 3 Pole 4 Wire

    $38.99
    SKU: ATO-L16-20
    Wholesale price 4-prong electrical locking plug, 20 amp rated current, 480 volt rated voltage, optional male and female plug. Its wiring and connecting is 3 pole and 4 wire grounding, manufacturer direct sale.

    30A 125V Locking Plug, 2 Pole 3 Wire

    $33.99
    SKU: ATO-LP5-30
    Electrical locking plug with 2 pole and 3 wire, 30A rated current, 125 rated current, male plug and female plug for you. This twist locking plug comes with nylon and full copper, and the dielectric voltage withstand is 18000V minimum.

    30A 125V Locking Receptacle, 2 Pole, 3 Wire

    $54.75
    SKU: ATO-BL5-30R
    Favorable price 30 amp 125V locking receptacle, with 2 pole 3 wire grounding for industrial or commercial settings. This twist lock receptacle is a socket uses a twist method with the plug to prevent the plug from accidentally disconnecting from the receptacle.

    30A 250V Locking Plug, 2 Pole 3 Wire

    $38.99
    SKU: ATO-LP6-30
    High quality electrical locking plug, 30 amp rated current, 250 volt rated voltage, optional male and female plug. Its wiring and connecting is 2 pole and 3 wire grounding, low price and manufacturer direct sale.

    30A 250V Locking Receptacle, 2 Pole, 3 Wire

    $54.75
    SKU: ATO-BL6-30R
    Low price 30 amp 250V locking receptacle, with 2 pole 3 wire grounding for industrial or commercial settings. This twist lock receptacle is a socket uses a twist method with the plug to establish safety connection.

    30A 277V/ 480V Locking Plug, 4 Pole 5 Wire

    $49.99
    SKU: ATO-L22-30
    30A electrical locking plug with 4 pole and 5 wire, 277V and480V rated voltage. It is made of high quality nylon and full copper. The dielectric voltage withstand is 18000V minimum. Male plug and female plug for your choices.

    30A 347V/ 600V Locking Plug, 4 Pole 5 Wire

    $59.99
    SKU: ATO-LP23-30
    30 amp 347V/600V 4-prong electrical locking plug with thermoplastic back cover, designed with black-beige color and super tough nylon, selectable male plug and female plug. It is commercial application and manufacturer direct sale.

    30A 480V Locking Plug, 3 Pole 4 Wire

    $38.99
    SKU: ATO-L16-30
    Electrical locking plug for sale online, 30A rated current 480V rated current, 3 pole and 4 wire grounding, male plug and female plug available. It is widely used for medical devices, electronics, generators and lifts.

    30A 600V Locking Plug, 3 Pole 4 Wire

    $38.99
    SKU: ATO-LP17-30
    High quality electrical locking plug, 30 amp rated current, 600 volt rated voltage, selectable male and female plug. Its wiring and connecting is 3 pole and 4 wire grounding, low price and manufacturer direct sale.

    Twist electrical locking plugs are suitable for medical devices, electronics, lighting, machinery, grills, generators and lifts, etc. They come with nylon material, high quality and durable, fall resistant and explosion-proof. Plug matching socket has the function of clamping the power cord to prevent the phenomenon of slack power failure in the work. ATO.com provides 15A, 20A, 30A locking plugs with 125V ~ 600V rated voltage, 2 pole, 3 wire, 3 pole, 4 wire, 4 pole, 5 wire for your choices, they are all at low price. In addition, you can select male plug or female plug according to your needs. Shop online now!

    What are the Types of Locking Plugs?

    Straight-blade, non-locking types

    Non-locking locking plugs feature flat-prong plugs that are designed to be pulled in and out of receptacles freely, which is convenient but is very likely to be disconnected by accident. They are commonly used for computers, household appliances and everyday applications where electrical devices are not required to be constantly turned on.

    Curved-blade, twist-locking types

    Twist-locking locking plugs have curved prongs that can be twisted after being inserted into the receptacle, to be locked in place. To unplug, the plug must be rotated in the reverse direction. Without this step, the plugged electrical devices cannot be disconnected, thus eliminating the risk of accidental disconnection and adding a layer of protection to electrical appliances. The locking coupling makes for a more reliable connection in commercial and industrial settings, where vibration or incidental impact could disconnect a non-locking connector.

    How to Select Locking Plugs and Electrical Outlets?

    Electrical outlets are an essential part of any home as well as commercial buildings and industrial areas. Improper configurations of plugs and receptacles could result in serious electrical hazards, such as short circuit, electrocution, electrical fires and so on. Therefore, it’s important to select the right outlets for any space that involves electricity.

    There are a variety of factors that should be taken into consideration when choosing and ideal plug or connector for any of your needs. You’ll need to consider the right combinations of amperage and voltage for specific appliances and the number of blades as well as different grades of outlets for commercial or residential buildings. Last but not least, there are also special features you can select for your outlets that suit your home and your family’s needs.

    Amperage

    • Selecting outlets with rated amperage no less than the circuit.
    • Most households have 15 amp outlets installed in place.
    • 20 amp outlets are often installed in higher-use areas.
    • 15 amp plugs can be inserted in either 15 or 20 amp outlets.

    Voltage

    • 110-120V plugs are generally used for common household appliances.
    • 220-240V plugs are used for heavy duty industrial applications.
    • 220-240V round plugs are a common alternative for 110-220V plugs.

    Number of blades

    Blades, also call pins, are male plug contacts that connect with female plug contacts. You can find round or flat blades in a variety of sizes on a plug. The number of pins you need for an outlet often depends on the appliance you’re trying to plug into it. To prevent serious safety hazards from occurring, it’s vital that you pick out a plug or connector with the right amount of blades as well as the correct configuration.

    Outlet Grades

    "Grade" essentially means levels of quality regarding outlets. There are generally three grades you can choose from.

    • Homeowner grade (Last 5-10 years)
    • Commercial grade (Last up to 100 years)
    • Hospital grade

    GFCI or AFCI outlets

    GFCI (Ground Fault Circuit Interrupters)

    • Contain a small circuit breaker.
    • Can protect you and your family from electric shock.

    AFCI (Arc Fault Circuit Interrupters)

    • Include a small built-in breaker.
    • Protect your home from electrical fires.
    • Typically found in bedroom.

    If you want to know more about how to buy NEMA plug, view the video below.