15 Feet 50 Amp Generator Cord and Power Inlet Box Combo Kit - Reliable

Our review of this 15 ft 50 amp generator cord and inlet box combo finds it aimed at homeowners and RV owners who need a straightforward way to connect a portable generator to house or transfer equipment. The kit's single biggest selling point is its practical, heavy duty construction: a 6/3+8/1 STW cord with 100% copper conductors paired with a pre-drilled NEMA SS2-50P inlet box. For anyone prioritizing a durable, weather resistant hookup that is ETL listed and rated for 125/250V up to 12,500 watts, this combo delivers a clear, simple solution without unnecessary extras.

Key Features

• ETL Listed: Provides verified safety compliance so users can trust the cord and inlet box meet common electrical standards for portable generator hookups.
• Heavy Duty STW AWG 6/3 + 8/1 Wire: The thick, flexible cord uses 100% copper coated conductors for reliable current flow and lower resistance during heavy loads.
• 125/250V, 12,500W Capacity: Rated for both 125/250V and a maximum wattage of 12,500 watts, making it appropriate for many whole-house and RV backup scenarios.
• Weather Resistant Construction: Flame retardant, heat resistant and UV resistant jacketing shields the cable and inlet box from rain, snow and sun exposure.
• Twist-Lock and Grip Design: The NEMA 14-50P to SS2-50R twist-lock connector and finger grip plug make connecting and securing the cord straightforward under typical outdoor conditions.
• Pre-Drilled Inlet Box: The metal power inlet box arrives with four pre-drilled holes and removable knockouts for faster installation and an anti-rust powder coating for outdoor durability.

Who It's For

This kit is well suited for homeowners who occasionally run a portable generator during outages and need a compact, dependable connection rated for up to 12,500 watts. It also works for RV owners or contractors who want a rugged, twist-lock style interface for site power where a 50 amp feed is required. The combination of the 15 ft length and heavy gauge cable is ideal when the generator is parked a short distance from the inlet.

Those who require longer runs, integrated transfer switches, or certified permanent transfer installations should look elsewhere. This product is a portable hookup solution rather than a permanently wired transfer system, so users planning continuous or code-level permanent installations will need professional-grade conduit and hardwired equipment.

Pros & Cons

Pros

• Solid build with 100% copper coated conductors for dependable power delivery under load.
• Weather resistant jacket and powder coated inlet box protect against rain, snow and UV damage.
• ETL listing and clear 125/250V, 12,500W rating give confidence in safe, rated use.
• Pre-drilled inlet box and finger grip plug improve ease of installation and handling.

Cons

• Length is fixed at 15 ft, which may be too short for setups with a distant generator location.
• Not a substitute for a permanently wired transfer switch or professional hardwiring for continuous use.

Specifications

Our Verdict

This 15 ft 50 amp generator cord and inlet box combo is a practical choice for homeowners and RV users who need a dependable, weather resistant 50A hookup for emergency or occasional use. With heavy gauge copper wiring, ETL listing and a coated inlet box, it offers strong value for typical backup power needs while remaining a portable, installation-friendly option.

Frequently Asked Questions

Is this kit suitable for whole-house backup?
The kit is rated to 12,500 watts and can support many whole-house or partial-house setups, but permanent whole-house transfer installations should use a dedicated transfer switch and professional wiring.

Can the inlet box be mounted outdoors?
Yes, the inlet box has an anti-rust powder coating, removable knockouts and pre-drilled holes to facilitate outdoor mounting and resistance to weather.

Does the cord provide weather protection?
The STW jacket is flame retardant, heat and UV resistant and designed to protect the cord from rain, snow, wind and typical outdoor abrasion.