Is it alright to use this connector on this cable 10/3UF-B southwire (30) amps cable?

I don't know that cable. If it has stranded wire and mechanically fits it will be fine. If the cable is solid wire I would ask the connector manufacturer.

Can i use 10/4 600-volt cu black flexible portable power soow wire with this connector?

Yes that’s what you will need to properly wire it

Can this be used for 400v 3 phase?

This will work just fine up to its 30 A rating. Be sure to purchase the correct mating connector. The data sheet will tell you which one matches. There are a lot of variations to keep people from plugging something into the wrong outlet. The ground connector has an L shaped connection, but the short side can point in or out with respect to the center of the connector. There are also different width pins for the hot leads. These connectors are called "TwistLock" because a small twist locks them in place. Another small twist the opposite direction releases them. They are popular for industrial applications because of their ruggedness, keying yo fit only the correct mating connector, and their ruggedness. They are priced accirdingly.

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Leviton 30 Amp, 480 Volt 3-phase, NEMA L16-30P, 3P, 4W, Locking Plug, Industrial Grade, Grounding, 2731, Black-White

Leviton 30 Amp, 480 Volt 3-phase, NEMA L16-30P, 3P, 4W, Locking Plug, Industrial Grade, Grounding, 2731, Black-White

Product ID: 22399109

Details

Brand
Leviton
Color
Black-White
Material
Nylon
Product Dimensions
30"D x 8"W x
Voltage
480

⚡30 Amp high power capacity

🔒Secure locking plug design

🛡️Industrial-grade rugged nylon

₨885

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Description

🔌 Lock in power, unlock your potential.

LOCK IT DOWN SECURELY - NEMA L16-30P locking plug ensures a safe, vibration-resistant connection that won’t come loose under pressure.
LIFETIME PEACE OF MIND - Industry-exclusive limited lifetime warranty, proudly made in North America, guaranteeing reliability you can trust.
POWER UP WITH CONFIDENCE - Handles a robust 30 Amp, 480 Volt 3-phase current for heavy-duty industrial applications.
BUILT TO BRAVE THE ELEMENTS - Rugged nylon construction resists impact, sunlight, chemicals, and rough use—engineered for longevity.
VERSATILE CORD COMPATIBILITY - Unique one-piece contacts and cord clamp accept a wide range of cord sizes, reducing friction and overheating.

The Leviton 2731 is a premium industrial-grade locking plug designed for 30 Amp, 480 Volt 3-phase power systems. Featuring a NEMA L16-30P configuration with 3 poles and 4 wires, it offers secure, vibration-resistant connections with rugged nylon construction that withstands harsh environments. Its unique one-piece contacts and versatile cord clamp reduce friction and overheating, backed by an industry-exclusive limited lifetime warranty and proudly manufactured in North America.

Specifications

ASIN	B001VY0GYE
Amperage	30 A
Best Sellers Rank	#55,530 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #137 in Electric Plugs
Brand Name	Leviton
Color	Black-White
Connector Type	Plug in
Customer Reviews	4.7 4.7 out of 5 stars (150)
Global Trade Identification Number	00078477808382
Included Components	2731
Item Dimensions D x W x H	30"D x 8"W x 6"H
Item Type Name	2731
Manufacturer	Leviton
Material Type	Nylon
Model	2731
Number Of Wires	4
Number of Items	1
Number of Packs	1
Number of Poles	3
Part Number	2731
Plug Type	NEMA L16-30P
Product Grade	Industrial
Specification Met	NEMA
UPC	078477808382
Unit Count	1 Count
Voltage	480 volts_of_alternating_current
Warranty Description	Limited Lifetime

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₨885

Duties & taxes included

In stock

Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Seychelles.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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Smooth transaction and product arrived in perfect condition.

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