









⚡ Stay powered, rain or shine — the pro’s choice for seamless generator hookup!
The Reliance Controls PB50 is a rugged, rain-tight 50-Amp power inlet box designed for outdoor use with generators up to 12,500 watts. Featuring a patented spacious wiring design, removable faceplate, and durable steel construction with anti-corrosive coating, it enables safe, hardwired connections to transfer switches—eliminating the need for extension cords through doors or windows. Trusted for over 100 years, this NEMA 3R-rated inlet box combines professional-grade reliability with easy installation and a 5-year warranty.






| ASIN | B000HRWGBW |
| Best Sellers Rank | #3,842 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #9 in Outdoor Generator Inlet Boxes |
| Brand | Reliance Controls |
| Capacity | 63.12 Cubic Inches |
| Color | Gray |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,807) |
| Finish Type | Non-Metallic |
| Global Trade Identification Number | 00851890000287 |
| Installation Type | Screw-In |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.97 pounds |
| Item model number | PB50 |
| Manufacturer | Reliance Controls |
| Material | Carbon |
| Product Dimensions | 2.63 x 4 x 6 inches |
| Style | Inlet Box |
| UPC | 851890000287 |
L**O
Well made
American made, God bless America.
P**R
Generator power ink
Works great as intended
S**N
Well-made inlet box
This brand came recommended by my electrician for generator inlet box. I went with 50 amp instead of 30 to future proof the generator setup. Installation for a panel with interlock kit went through w/o any issues.
R**T
Easily installed
Easily installed, sufficient room for 6 gauge conductors (it will accommodate 4 gauge). Not sure about previously noted problems with wire size and connecting the generator cord. This was one of the easiest 6 gauge installs and my generator cord inserts and locks with no issues. Maybe they were using a cheap import cord?
A**R
Good Generator Inlet Box
This inlet box is very good quality but could use a few design changes. The connectors are designed for 8 AWG so you cannot connect 6 AWG (which is required for 50 amp) without using wire pin connectors and bending them 90 degrees. Next, the box is a bit too small for 6 AWG so make sure you use the bottom knock out. Otherwise, works well and gets the job done. Docking 1 star because it is not really well designed for 6 AWG.
2**R
High quality Inlet box
Very high quality and easy to install box. Feels like it will keep the rain out nicely. Connectors all felt strong. Tested after installing with a 10000 watt generator with the whole house running. Worked perfectly.
J**R
Well built and easy to install.
Well built and easy to install. I used 6/3 copper wire and had no issues fitting the wires in the box.
R**.
Works with #6 wire
Bought this box to replace a 30 amp inlet box that was mounted to the house when we purchased it in early 2021. This box was very easy to install on the brick exterior of the house. I added a thick rubber washer between the box and the brick at the top screw to allow the top to easily slide down over the box. I also used #6 wire and had no problem with the thicker wire. I followed the advice of another rater and made a 45 degree bend in the wire about an inch from the end, before removing the insulation. Once the insulation is removed the wire fits very nicely into the hole and lies parallel to the plane of the back of the inlet receptacle and the box. Completing the assembly was not that difficult after the wires were securely attached to receptacle. Also, I only left about 6 inches of wire in the box, just enough to work with. An electrician quoted me $900+ to install the box and connect to the transfer switch. Time to head down to Lowe’s to buy the generator.
V**R
You tube folk recommended going for the copper cone toons. Only 50 amp one on Amazon
R**L
Well built very sturdy
O**R
Solide et bonne connection avec le connecteur mâle de la mm marque.
L**N
Good product. Wiring from the back is a little difficult when using 6-gauge wires.
U**.
Overall this is a good sturdy unit. My only negative would be that the wiring space inside the box could be a bit bigger. It's a bit crowded for 3 #6 wires plus ground
Trustpilot
3 days ago
1 month ago