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Orange 40 ft heavy-duty generator extension cord with twist-lock NEMA L14-30 connectors and storage strap

VEVOR

VEVOR 40 ft 30 A 10/4 SJTW NEMA L14-30 Generator Extension Cord

SKU CH-AYX9-FMWQW

A 40 ft, 30 A, 10/4 SJTW cord with NEMA L14-30 twist-lock connectors delivers up to 7500 W from a generator

  • Product typeOther Appliances
  • Delivers 7500 W through 100 % copper 10/4 conductors
  • Extends generator power 40 ft to keep exhaust at a safe distance
  • Twist-lock NEMA L14-30 connectors resist accidental disconnection in storms
  • Weather-rated SJTW jacket withstands outdoor moisture and abrasion
  • Includes storage strap for tidy cooldown and transport

Generator Extension Cord 40 ft

The VEVOR generator extension cord is a 40 ft heavy-duty power cord rated for 30 amps at 125/250 volts. It uses a 10 gauge four-conductor SJTW cable made from 100 percent copper wire. The cord terminates in NEMA L14-30P and L14-30R twist-lock connectors suitable for portable generators up to 7500 watts.

Sustained Load Performance

The 10 gauge copper conductors are sized to carry the full 30 amp rating continuously without excessive voltage drop over the 40 ft length. The SJTW jacket resists oil, water and UV exposure, maintaining flexibility and insulation integrity during extended outdoor operation in adverse weather.

Pre-Installation Checklist

Verify that your generator provides a NEMA L14-30R receptacle and that the inlet box or transfer switch on the building side accepts a NEMA L14-30P plug. Confirm the generator's maximum continuous output does not exceed 7500 watts and that the 40 ft length reaches your intended connection point without strain.

How it compares

Measured against everything we stock in AC Extension Cords, at today’s prices. Recalculated every night.

Price $82.99
Pricier than about 91% of the 864 comparable items (median $15.99).

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Specifications

Product
Product typeOther Appliances

Questions about this item

Does the 10 AWG copper cable stay cool when the cord carries a full 30 A load all day?

The 10/4 SJTW cord uses 100 % copper conductors rated for 30 A at 125/250 V, so it is designed to handle continuous 7500 W operation without overheating.

What generator outlet and transfer-switch inlet must I already have to use this cord?

You need a NEMA L14-30P outlet on the generator and a matching L14-30R inlet on the transfer switch or power inlet box.

Will the L14-30 twist-lock ends fit the standard L14-30 receptacles already on my generator and transfer switch?

Yes, both ends are built to the NEMA L14-30 configuration, so they lock securely into any standard L14-30 receptacle.

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