Generac 30-Amp Power Inlet Box L14-30 — Weather-Resistant NEMA 3R Resin, Fits up to 7,500W

Generac 6340 is a weather-resistant 30-Amp, 125/250V power inlet box that lets you plug a portable generator into a home transfer switch safely and conveniently.

This compact, UL Listed inlet box is made from NEMA 3R-rated non-metallic resin to resist rain, snow and debris while providing a reliable hard-wired connection between a portable generator and an indoor transfer switch. Sized at 6" x 5" x 5" and weighing about 3 pounds, the unit supports up to 7,500 watts and accepts standard L14-30 style generator cords. It is compatible with many Generac portable models and select Generac transfer switches, and it includes multiple knockouts for flexible wiring runs.

How does this inlet box connect my generator to my home's transfer switch?

Install the Generac 6340 on an exterior wall and hard-wire it to the transfer switch inside the building. During an outage you connect your portable generator to the inlet with a 30-Amp L14-30 cord, allowing the transfer switch to safely route generator power to selected circuits.

• Hard-wires to your existing transfer switch for safe circuit control
• Uses a standard L14-30 30A generator cord for easy hookup
• Supports generators up to 7,500 watts for essential loads
• Compatible with listed Generac transfer switch models (e.g., 6376–6382)

Is the Generac 6340 durable enough for outdoor use?

Yes. The housing is molded from weather-resistant, non-metallic resin and carries a NEMA 3R rating for protection against rain and sleet. A spring-loaded flip lid keeps the inlet covered when not in use and helps prevent moisture and debris from entering the receptacle.

• NEMA 3R-rated resin enclosure resists corrosion and elements
• Spring-loaded flip lid protects the inlet when not connected
• Compact, low-profile design mounts discreetly on exterior walls
• Six knockouts provide wiring routing options for installers

Which generators and transfer switches work with this inlet box?

The 6340 accepts a 30-Amp L14-30 configuration compatible with many Generac portable models and several Generac transfer switches. Confirm the outlet type on your generator and the transfer switch model number before purchase to ensure compatibility.

• Compatible with Generac portable generators featuring 30A outlets (e.g., GP3250, GP7500E, XG8000E)
• Pairs with Generac transfer switches such as models 6376–6382
• Designed for standard 125/250V, 30A generator cords (L14-30)
• UL Listed for safety and compliance

What should I know about installation and warranty?

Generac recommends professional installation by a licensed electrician to ensure code-compliant wiring and safe operation. The inlet box ships ready to mount and comes with a two-year limited warranty backed by Generac, a U.S.-based manufacturer known for power equipment.

• Professional electrician recommended for hard-wiring and compliance
• UL Listed product for tested safety standards
• 2-year limited warranty from Generac for manufacturing coverage
• Proudly made in the USA at Generac manufacturing facilities

Who this is for: The Generac 6340 is aimed at homeowners and small business operators who want a compact, weatherproof inlet box to connect a portable generator to a transfer switch for reliable emergency power. It is well-suited to users of Generac 30-Amp portable generators and anyone seeking a UL Listed, low-maintenance outdoor inlet that installers can integrate into established backup power systems.