CircleCord 4 Prong 6.6 ft 30 Amp Generator Extension Cord - Inlet Box

In this review the CircleCord 4 Prong 6.6 ft 30 Amp Generator Extension Cord with inlet box is examined for homeowners and contractors who need a straightforward, durable way to connect a portable generator to a house transfer switch. The bottom line: this kit's biggest strength is its combination of a heavy duty 10 gauge SJTW cable and a pre-drilled inlet box, which together make emergency hookup fast and reliable without special tools. For anyone prioritizing weather resistance and a locking NEMA L14-30 connection, this setup delivers sensible, no-nonsense performance.

Key Features

• ETL Listed: The assembly meets independent safety standards so users can trust the cord and inlet box for household generator connections.
• 10 gauge SJTW cable: Heavy duty pure copper wiring supports up to 125/250V and 7500W, providing robust capacity for typical standby generator loads.
• Locking twist connection: The NEMA L14-30P male to L14-30R female twist lock ensures a secure, vibration-resistant link between generator and inlet box.
• Pre-drilled inlet box: The box comes with rubber plugs in place of knockouts so openings can be removed without drilling or damaging the enclosure.
• Weather resistant jacket: Flame retardant, heat and UV resistant PVC coating protects the cable from rain, snow, soil and rough conditions.
• Storage convenience: A storage bag and adjustable cord organizer are included to keep the 6.6 ft cord neat after use.

Who It's For

This product is aimed at homeowners and small contractors who need a compact, ready-to-install generator feed for a manual transfer switch or inlet connection during outages or for temporary power during construction. Its 6.6 ft length is convenient when the generator is positioned close to the house and a locking connector is desired for a secure hookup.

It is less suitable for situations that require long runs from generator to inlet or where a higher amperage is necessary; users needing much longer cable runs or different connector types should look at other lengths or configurations.

Pros & Cons

Pros

• Sturdy 10 gauge copper SJTW cable offers dependable capacity and durability for emergency power needs.
• ETL Listed construction gives added confidence in safety and build quality.
• Pre-drilled inlet box with removable rubber plugs removes the need for special tools during installation.
• Includes storage bag and cord organizer for neat transport and storage after use.

Cons

• At 6.6 ft the cord is relatively short, so placement of the generator must be close to the inlet box.

Specifications

Brand	CircleCord
Cable	10 gauge 4 prong SJTW
Connector	NEMA L14-30P to L14-30R twist lock
Voltage/Power	125/250V, up to 7500W
Length	6.6 ft
Certifications	ETL Listed
Box feature	Pre-drilled with removable rubber plugs

Our Verdict

The CircleCord 4 Prong 6.6 ft 30 Amp kit is a practical, well-built option for homeowners who need a compact, safe generator-to-house connection. Its locking connector, ETL Listing and weather resistant construction make it good value for emergency standby or short-term jobsite use, as long as the generator will sit close to the inlet.

Frequently Asked Questions

Is this ready to install?
Yes - the inlet box is pre-drilled with removable rubber plugs so installation does not require a knockout tool.

What load can this support?
The 10 gauge SJTW cable and connectors are rated for 125/250V up to 7500W with a 30 Amp twist lock configuration.

Can it be used outdoors in bad weather?
The cable has a flame retardant, heat and UV resistant PVC jacket designed to resist rain, snow and outdoor conditions for emergency use.