50 Amp Generator Cord 15FT and Power Inlet Box - Weatherproof Kit

Our review of this 50 amp generator cord and inlet box kit finds it best suited for RV owners, contractors, and anyone who needs a reliable generator-to-house hookup. The single biggest reason to buy is its practical combination of a heavy duty 15 ft 50 amp cord and a pre-drilled inlet box that removes the usual hassle of drilling or modifying fittings. Both items are ETL listed, which gives confidence for outdoor use in adverse weather, and the included accessories make it a complete, ready-to-install kit.

Key Features

• Heavy duty cord: The 15 ft cable uses 100% copper conductors and STW 6/3 + 8/1 AWG wiring to deliver up to 12,500 watts for high-demand appliances.
• NEMA compatibility: A NEMA 14-50P male plug and NEMA SS2-50R twist-lock female connector simplify safe connections to common generators and inlet boxes.
• Pre-drilled inlet box: The inlet box has four pre-drilled knockouts in multiple directions so installers can connect to panels without extra drilling.
• Outdoor rated and ETL listed: Both cord and inlet box passed ETL certification, providing added assurance for outdoor, emergency, or storm conditions.
• Ease of use: The cord has an ergonomic finger grip and a twist locking ring to keep out dust and rain, while the inlet box has a green power indicator on the cap.
• Complete kit: The package includes the 15 ft cord, pre-drilled inlet box, a 50A adapter plug, cable tie and storage bag for convenient transport and installation.

Who It's For

This kit is aimed at RV owners, contractors, and homeowners who need a portable, weatherproof solution to hook a generator to an inlet box or transfer switch. The 15 ft length and 12,500 watt capacity make it suitable for powering appliances and RV service panels without running long extension runs.

People who need an ultra-flexible or much longer cord, or those requiring specialized hardwired transfer equipment, should look elsewhere. Also, buyers who require a guaranteed adapter in the box for every production batch should confirm availability with the seller before purchase.

Pros & Cons

Pros

• Well-built cable and plugs deliver robust build quality and reliable connections for heavy loads.
• The pre-drilled inlet box saves installation time and eliminates the need for drilling on site.
• ETL listing and the waterproof twist-lock cap improve safety for outdoor use in bad weather.
• Included accessories make the kit ready to use right out of the box.

Cons

• Some production batches may ship without the adapter, so buyers should check contents on arrival.
• The 15 ft length is practical for most setups but may be short for some generator placement needs.

Specifications

Cord length	15 ft
Voltage	125V/250V
Wire gauge	STW 6/3 + 8/1 AWG
Male plug	NEMA 14-50P
Female plug	NEMA SS2-50R (twist lock)
Maximum wattage	12,500 Watts
Certification	ETL listed

Our Verdict

This 50 amp generator cord and pre-drilled inlet box kit is a solid, practical choice for RV owners and installers who want a durable, weather-ready hookup with minimal fuss. The ETL listing, robust 100% copper conductors, and the convenience of a pre-drilled box deliver good value for the price, though buyers needing longer reach or guaranteed included adapters should confirm details before ordering.

Frequently Asked Questions

Is the kit rated for outdoor use?
Yes. Both the cord and inlet box are ETL listed and designed for outdoor use in adverse weather.

Will this fit my generator?
The cord uses a NEMA 14-50P to NEMA SS2-50R twist-lock connector, which fits generators and inlet boxes that accept those standard plugs.

Does the package include an adapter?
The kit normally includes a 50A adapter plug, cable tie and storage bag, but some production batches may ship without the adapter; contact the seller if it is missing.