NEMA 14-50R Outdoor RV Power Outlet Box - Lockable Weatherproof

Our review of this NEMA 14-50R outdoor outlet box finds it best suited for RV owners, campers, and light EV or generator use where a durable, lockable receptacle is needed. The single biggest reason to buy is its heavy-duty powder coated steel enclosure that protects the 50 Amp, 125/250V receptacle from weather and impact while allowing an in-use plug to remain locked and covered. Installers will appreciate the clear terminal labeling and the flexibility to mount vertically or horizontally, making it a practical, long-lasting outdoor power solution.

Key Features

• Weatherproof enclosure: Powder coated steel resists heat, impacts, and year-round elements to extend service life outdoors.
• Lockable in-use design: The cover closes and can be locked with a plug inserted to prevent tampering and damage when in use.
• 50 Amp, 125/250V receptacle: Industry-standard NEMA 14-50R configuration supports RVs, campers, motorhomes, EV mobile chargers, and generators when compatible.
• Easy installation: Terminals are marked for fast wiring and the box supports both vertical and horizontal mounting orientations.
• Industrial grade build: V2 rated straight blade grounded receptacle provides reliable grounding and durable performance.

Who It's For

This outlet box is ideal for RV owners and campers who need a weatherproof, lockable 50 Amp outdoor receptacle for seasonal or permanent installation. It also works well for homeowners who occasionally run a generator or use a compatible EV mobile connector outdoors and want a robust, vandal-resistant point of connection.

Prospective buyers who need a very small or recessed cutout should take caution, since some customers noted the cutout and fit can be tight for certain mobile chargers. If you require a purpose-built EV charging station with electronics or smart features, look elsewhere for a dedicated EV charger platform rather than a simple receptacle box.

Pros & Cons

Pros

• Sturdy powder coated steel housing provides long-term protection from weather and impacts.
• Lockable in-use cover lets a plug remain inserted while the box is secured against tampering.
• Clear terminal markings and support for vertical or horizontal mount make installation straightforward.
• Good value for a basic industrial grade outdoor receptacle.

Cons

• Cutout size and internal clearance can be tight for some mobile connectors, so check compatibility before purchase.
• Lock sold separately, so extra purchase required for full tamper protection.

Specifications

Brand	ENERLITES
Receptacle type	NEMA 14-50R (straight blade, grounded)
Rating	50 Amp, 125/250 Volt
Enclosure material	Powder coated steel
Mounting	Vertical or horizontal installation
Features	Weatherproof, lockable in-use cover, terminals marked
Warranty	1 year

Our Verdict

For anyone needing a durable, no-frills outdoor 50 Amp outlet, this lockable NEMA 14-50R box delivers dependable protection and easy installation at a sensible price. It is a solid choice for RVers and occasional generator or mobile EV connector use, provided the plug you plan to use fits the box opening; buyers seeking a smart EV charging solution should consider a dedicated charger instead.

Frequently Asked Questions

Can this box be locked while a plug is inserted?
Yes, the in-use design allows the cover to be closed and locked with a NEMA 14-50P plug inserted; the lock is not included.

Is this suitable for EV charging?
It can be used with compatible EV mobile connectors that fit the opening, but it is not a powered or smart EV charger; verify your connector and vehicle manual for compatibility.

What material is the enclosure made from?
The receptacle box is made from powder coated steel to resist weather, heat, and impact for outdoor use.