50 A RV Power Outlet Box — NEMA 14-50R, 125/250V | Model RM50DFPB-22 - Home Energy Storage Systems | Solar Batteries

Description

50 Amp RV Power Outlet Box – NEMA 14-50R 125/250V, ETL Listed | RM50DFPB-22

The RM50DFPB-22 is a hardwired, heavy-duty 50 Amp RV / Outdoor Power Outlet Box built around the industry-standard NEMA 14-50R receptacle. It provides a 125 / 250V AC, 3-pole / 4-wire connection point for RV shore power, travel trailers, motorhomes, portable EV charging units, generators, and outdoor power taps.

The unit uses a steel housing with a painted finish for improved impact resistance and exterior durability compared with lightweight plastic alternatives. Its flip / swing protective cover is padlockable when the plug is engaged, helping reduce accidental unplugging, casual cord removal, or unauthorized power use.

Designed for wall or post mounting, this outlet box is suitable for indoor or outdoor-capable installations. Weather resistance depends on correct mounting, conduit sealing, drainage, and use of appropriate fittings or gaskets at the knockout entries.

The RM50DFPB-22 is intended for hardwired installation through conduit or jacketed cable into KO openings. It is commonly used with #4 AWG to #8 AWG copper conductors, subject to local electrical code and AHJ requirements. A dedicated 50A 2-pole branch circuit should be sized and installed by a qualified electrician.

With ETL Listed safety compliance, a spacious steel enclosure, and a standard 14-50R interface, the RM50DFPB-22 offers a clean, code-conscious shore-power or 50A outdoor receptacle point for residential, workshop, ranch, campsite, and utility applications.

50 Amp RV / Outdoor Power Outlet Box for dedicated high-power connection points.
NEMA 14-50R straight blade receptacle with 3-pole / 4-wire L1-L2-N-G configuration.
Rated for 50A current and 125 / 250V AC operation.
50 / 60 Hz frequency compatibility for standard power systems.
Maximum power rating of 12,500W at 250V.
Hardwired wiring method through conduit or jacketed cable via KO openings.
Typical #4 AWG to #8 AWG copper conductor range, subject to local code and AHJ approval.
Steel housing with painted finish for durable indoor or outdoor-capable installation.
Padlockable flip / swing protective cover when the plug is engaged.
Self-grounding through bonded steel enclosure, with equipment ground required at the supply side.
Wall or post mount design for driveways, barns, ranch pads, workshops, and private campsites.
Suitable for RV shore power, travel trailers, motorhomes, portable EV / PHEV charging, generators, welders, and 50A workshop taps.
Compact 7.09 × 5.31 × 6.89 in enclosure with 4.59 lb net weight.
ETL Listed for recognized third-party safety compliance.

Model	RM50DFPB-22
Product Name	50 Amp RV / Outdoor Power Outlet Box
Receptacle Type	NEMA 14-50R (Straight Blade, 3-Pole, 4-Wire: L1-L2-N-G)
Rated Current	50A
Voltage	125 / 250V AC
Frequency	50 / 60 Hz
Max. Power	12,500W @ 250V
Grounding	Self-grounding via bonded steel enclosure; equipment ground required at supply side
Wiring Method	Hardwire through conduit or jacketed cable via KO openings; copper conductors recommended
Conductor Range	Typical #4 AWG to #8 AWG copper; follow local code and AHJ requirements
Enclosure Material	Steel housing, painted finish
Cover	Flip / swing protective cover; padlockable when plug is engaged; lock not included unless stated
Mounting	Wall / post mount; indoor or outdoor capable, depending on proper conduit sealing and mounting
Overall Dimensions	7.09 × 5.31 × 6.89 in / 18 × 13.5 × 17.5 cm
Net Weight	4.59 lb / 2.08 kg
Safety / Compliance	ETL Listed
In the Box	Outlet box ×1 · Installation guide ×1 · Mounting hardware optional / selected at checkout

Download the MSP-100 user manual for detailed product operation, installation guidance, safety instructions, maintenance information, and technical reference.

Download MSP-100 User Manual

Frequently Asked Questions

Q1: Is the RM50DFPB-22 plug-and-play with a regular wall outlet?

A: No. The RM50DFPB-22 is a hardwired enclosure designed to be fed from a dedicated 50A 2-pole circuit installed by a qualified electrician. It does not plug into a standard 15A or 20A household receptacle.

Q2: What receptacle type does this outlet box use?

A: It uses a NEMA 14-50R straight blade receptacle with a 3-pole / 4-wire L1-L2-N-G configuration for 125 / 250V AC applications.

Q3: Will my RV shore-power cord fit?

A: If your RV uses a standard NEMA 14-50P 50A shore-power plug, yes. The RM50DFPB-22 is built around the matching NEMA 14-50R receptacle, and the enclosure is sized so the lid can close with the plug inserted.

Q4: Is this outlet box waterproof?

A: It is designed for indoor or outdoor-capable installation with a weather-shielded cover, but true weather resistance depends on proper conduit fittings, sealing, gaskets, mounting direction, and drainage. It should not be treated as submersible equipment.

Q5: What wire size should be used?

A: The product specification lists a typical #4 AWG to #8 AWG copper conductor range. Final wire size must be selected according to local electrical code, circuit length, load calculation, ambient conditions, and AHJ requirements.

Q6: Can this be used for EV charging?

A: Yes, it can provide a fixed NEMA 14-50R connection point for compatible portable or cord-connected EV / PHEV chargers. Always follow the EVSE manufacturer instructions, use a dedicated properly rated circuit, and comply with NEC and local requirements.

Q7: Does the cover lock?

A: The flip / swing protective cover is padlockable when the plug is engaged. The padlock itself is not included unless specifically stated in the product listing or shipment configuration.

Q8: Is the RM50DFPB-22 suitable for generators?

A: It can be used as a fixed 14-50R outdoor power tap for generator-related setups when the system is configured with proper transfer, disconnect, grounding, and code-compliant installation.

Q9: What are the dimensions and weight?

A: The overall dimensions are 7.09 × 5.31 × 6.89 in / 18 × 13.5 × 17.5 cm. The net weight is 4.59 lb / 2.08 kg.

Q10: Is it ETL Listed?

A: Yes. The RM50DFPB-22 is ETL Listed. Final acceptance for any installation is still determined by the local AHJ or inspector.

Additional information

Quantity	1-Pack, 2-Pack, 3-Pack

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