MULMART 50 Amp Generator Cord and Power Inlet Box — 15ft NEMA14-50P to SS2-50R, Weather-Resistant Twist-Lock

MULMART's 50 amp generator cord paired with a 50A power inlet box provides a ready outdoor connection for 125/250V, 12,500W generators with a secure twist-lock receptacle.

This kit combines a 15-foot heavy-duty STW cable with a NEMA 14-50P male plug and a NEMA SS2-50R twist-lock female inlet, plus a weather-resistant inlet box engineered for permanent outdoor installation. It’s sized to support up to 50 amps (125/250 volts) and can handle about 12,500 watts, making it suitable for RVs, backup generators, and outdoor power distribution where a reliable, code-friendly inlet is needed.

How does the MULMART 50A cord connect a generator to my home or RV?

The cord uses a NEMA 14-50P male plug on one end and a NEMA SS2-50R twist-lock female on the other, designed to mate with standard 50-amp generator outlets and inlet boxes. The twist-lock connection prevents accidental disconnection and the finger-grip on the male plug makes handling easier under load or in tight spaces.

• 15-foot STW 6/3 + 8/1 AWG cable for flexibility and distance
• NEMA 14-50P male plug — 50A, 125/250V
• NEMA SS2-50R twist-lock female receptacle for secure connection
• Finger-grip design for easier plugging and unplugging

What are the electrical ratings and safety certifications?

This assembly supports up to 50 amps at 125/250 volts and is rated for approximately 12,500 watts continuous load when installed correctly. The inlet box and cord are ETL listed, indicating they meet recognized safety standards for outdoor electrical equipment.

• 50 amps, 125/250 volts — compatible with 50A generator circuits
• Maximum wattage: 12,500 W
• ETL listed for verified safety performance
• Supports 4–8 AWG wire connections inside the inlet box

Is the inlet box suitable for outdoor installation and bad weather?

The power inlet box is built to be installed outdoors in an open area and includes weather-resistant features to withstand wind and rain when mounted properly. Its construction is intended to provide a durable junction point between a generator cord and your permanent wiring or transfer switch.

• Outdoor-rated inlet box for exposed locations
• Designed to resist wind and rain when correctly mounted and sealed
• Works with standard 50A generator cords and compatible transfer panels
• Supports secure twist-lock connection to prevent accidental disconnection

How do I use and maintain the MULMART 50A kit safely?

Always shut off the generator and any connected transfer switch before making or breaking connections. Inspect the cord and inlet box regularly for cracks, corrosion, or loose terminals, and replace damaged components to maintain safe operation.

• Turn all power sources off before connecting or disconnecting
• Check cable jacket, plugs, and inlet seals for wear or damage
• Use proper gauge wire for permanent connections inside the inlet box
• Follow local electrical codes and consult a licensed electrician for permanent installs

Who is this for? This MULMART kit is aimed at homeowners, RV owners, event organizers, and contractors who need a dependable, code-conscious way to feed 50-amp, 125/250V power from a portable generator into an inlet or distribution panel outdoors. It’s a practical choice for seasonal backup power, RV shore power alternatives, tailgating setups, and temporary job-site power where a robust twist-lock inlet and ETL certification are important considerations.