CircleCord 15 ft 30A Generator Extension Cord with Inlet Box — 4‑Prong L14-30 Twist-Lock, 10 AWG Weatherproof

CircleCord 15-foot 30 Amp 4-prong generator extension cord with integrated inlet box lets you safely link a portable generator to a home's transfer switch using a NEMA L14-30 twist-lock connection.

This heavy-duty generator extension kit combines a rugged 10 AWG SJTW cable, a weather-resistant inlet box and convenient storage accessories so you can set up emergency power quickly and reliably. Built to meet ETL standards, the L14-30P male to L14-30R female twist-lock cable handles 125/250V circuits up to 7,500 watts, and the inlet box includes removable rubber plugs at the knockouts to simplify installation without special tools.

How does this cord and inlet box make generator hookup safer?

The twist-lock NEMA L14-30 connectors keep connections secure under vibration and movement, reducing the chance of accidental disconnection. The inlet box isolates the connection from the elements and organizes the cable route to the transfer switch, which lowers exposure to moisture and debris.

• ETL listed components for verified electrical safety.
• Twist-lock L14-30P to L14-30R prevents loose plugs.
• Weatherproof inlet box with rubber plug knockouts for sealed entry.
• 10 gauge pure copper conductors for reliable current delivery.

Will this handle my generator's power and different weather conditions?

The 10 AWG SJTW cable is rated for 125/250V and supports up to 7,500 watts, suitable for most residential 30 Amp generator outputs. Its PVC jacket is flame retardant, heat and UV resistant, and built to withstand rain, snow and abrasion in outdoor installation situations.

• 10 gauge copper conductors for efficient power transfer.
• SJTW jacket resists UV, heat, moisture and abrasion.
• Rated for up to 7500W at 30 Amp, 125/250V circuits.
• Durable twist-lock connectors maintain contact under load.

How easy is it to install and store when not in use?

The inlet box comes pre-fitted with removable rubber plugs instead of raw knockouts, so you can open the required holes by hand without drilling or special knockout tools. After use, the cable and box tuck into the supplied storage bag and an adjustable cord organizer keeps the cable neat and transportable.

• Pre-drilled rubber plug knockouts for tool-free opening.
• Included storage bag protects components during transport.
• Adjustable cord organizer prevents tangles and speeds setup.
• Compact 15-foot length balances reach and manageability.

What connectors and ratings should I verify before buying?

Confirm your generator and transfer switch accept an L14-30 locking connection and that a 30 Amp, 125/250V cable meets your load needs. Check that 7,500 watts maximum is sufficient for the appliances you plan to run during an outage.

• NEMA L14-30P male to L14-30R female twist-lock connectors.
• 30 Amp, 125/250V capability with 10 AWG conductors.
• ETL listing for component safety verification.
• 15-foot length for typical generator-to-panel distances.

Who is this for: CircleCord's 15-foot 30 Amp 4-prong generator extension cord and inlet box is aimed at homeowners, contractors and builders who need a compact, code-conscious solution for connecting a portable generator to a manual transfer switch. It’s suited to anyone who wants a weather-resistant, ETL-listed kit that reduces setup time, keeps connections secure with L14-30 twist-lock fittings, and stores neatly between uses.