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Reliance Controls PB50 50-Amp (CS6375) NEMA 3R Power Inlet Box,Gray

4.7 4.7 out of 5 stars 1,598 ratings

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Inlet Box

Purchase options and add-ons

Material Carbon
Brand Reliance Controls
Color Gray
Style Inlet Box
Item Weight 1.97 Pounds

About this item

  • For indoor or outdoor use with specific transfer switches, manual transfer panels and generator-ready load centers
  • Outdoor, raintight NEMA 3R non-metallic power inlet box
  • Maximum generator running watts: 12,500
  • Maximum generator input: 50A@125/250VAC
  • Intended for use with 8 AWG 75 degrees C insulated wire

Customer ratings by feature

Weatherproof
4.8 4.8
Sturdiness
4.6 4.6
Value for money
4.5 4.5
Easy to install
4.3 4.3

Frequently bought together

$88.83
Get it as soon as Sunday, Mar 24
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$92.91 ($6.19/Foot)
Get it as soon as Sunday, Mar 24
In Stock
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$399.89
In Stock
Ships from and sold by Jasper Generators LLC.
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From the manufacturer


About Reliance Controls Corporation:

Since 1909, Reliance Controls Corporation has contributed more innovations than any other single manufacturer and has been awarded over 85 patents on manual transfer switches, time switches and accessories. Reliance Controls Corporation specializes in the manufacturing of a wide variety of electrical products. And after over a century of innovation, Reliance Controls Corporation has built an enviable reputation for high quality and superior engineering.

Reliance Controls Corporation PB50 50-Amp NEMA 3R Power Inlet Box

50-Amp for Generators Up to 12,500 Running Watts

The Reliance Controls Corporation PB50 50-Amp NEMA 3R Power Inlet Box is designed for the use with the Pro/Tran transfer switches and Panel/Link manual transfer panels and generator-ready load centers. The power inlet box may be installed indoors, or outdoors in an open area where the generator is being used. Using one of the four combination 1/2-inch and 3/4-inch knockouts the power inlet box can be wired directly to the transfer switch or panel.

PBN Series

  • The rain tight NEMA 3R PBN-Series steel power inlet box is designed for use with Pro/Tran transfer switches, Panel/Link transfer panels and generator-ready load centers.
  • The front entry inlet has a weatherproof spring cover which closes when not in use to protect the inlet from the elements.
  • It is designed to be installed outdoors in an open area where the generator is being used to avoid carbon monoxide hazard.

Works Best with these Reliance Controls Accessories

male plug

transfer switch

generator cord

mounting kit

Reliance Controls L1430P 30-Amp 125/250 Vac Male Plug for Generator Cords

Reliance Controls 30508B Pro/Tran 8-Circuit 30 Amp Generator Transfer Switch

Reliance Controls Corporation PC3040 30-Amp, 40-Foot Generator Power Cord

Reliance Controls KF10 Mounting Kit

Product information

Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Reliance Controls PB50 50-Amp (CS6375) NEMA 3R Power Inlet Box,Gray


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Product guides and documents

Product Description

Product Description

The Reliance Controls PB50 50-Amp NEMA 3R Power Inlet Box is a watertight electrical inlet box designed to be located outdoors where the generator is running in order to prevent dangerous carbon monoxide fumes from entering your house or other cherished space. This inlet box should be safely hardwired through an outside wall directly to the transfer switch or panel, eliminating the need for cords running through windows or doors. It was also designed to be wired directly to the transfer switch or panel by using one of the four included combination 1/2-inch and 3/4-inch knockouts (one on each side, bottom and back). The exclusive, patented make provides generous wiring space and facilitates rough-in. The face of the box is removable for easy placement and wiring and, finally, it was constructed of steel with rugged, anti-corrosive, powder-coated paint and has a spring-loaded inlet cap to prevent moisture front entering the front-mounted connector inlet when not in use. Since 1909, Reliance Controls Corporation has contributed more innovations than any other single manufacturer and has been awarded over 85 patents on manual transfer switches, time switches and accessories. Reliance Controls Corporation specializes in the manufacturing of a wide variety of electrical products. The primary product line consists of heavy duty time clocks and controls, generator accessories, transfer switches and transfer panels for portable generators. And after over a century of innovation, Reliance Controls Corporation has built an enviable reputation for high quality, superior engineering and exceptional customer service.

Amazon.com

The Reliance Controls 50 Amp power inlet box is designed for outdoor use and can be hardwired directly to Reliance Controls transfer switches or panels, eliminating need for cords running through windows or doors. This rain-tight, rust-proof unit works with generators working at 12,500 watts. Using one of the four combination 1/2-inch and 3/4-inch knockouts (one on each side, bottom and back), the power inlet box can be wired directly to the transfer switch or panel. The exclusive patented design provides generous wiring space. The face of the box is removable for easy placement and wiring. It is cUL 1008 listed and covered by a 5-year warranty.

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Customer reviews

4.7 out of 5 stars
4.7 out of 5
1,598 global ratings

Customers say

Customers like the quality, performance, ease of installation, and value of the electrical inlet. They mention that it works well, snaps in place easily, and is a good buy. Customers also appreciate connectivity, and water resistance. That said, some complain about the size. Opinions are mixed on appearance.

AI-generated from the text of customer reviews

100 customers mention88 positive12 negative

Customers like the quality of the electrical housing. They mention that it's well-made, has a rugged construction, and is a great enclosure. Some customers also appreciate the extra space inside the box. Overall, customers are happy with the quality and functionality of the product.

"Seems very durable. The cover did stick slightly when I took it off but snaps in place easily.Overall this is a great product." Read more

"...Other brands have larger holes. Quality is reasonable it would work well with 30 amp wires" Read more

"...This could work in many applications and its built well. Now, time to order some wood putty and fix all the mistake holes.! Wish me luck.!" Read more

"...It seems to be fairly good quality, but for 50 amps you need 6 gauge wire, and their is not enough space between the back of the plug where the..." Read more

47 customers mention46 positive1 negative

Customers are satisfied with the performance of the electrical housing. They mention that it works well, functions well, and is appropriate for the application.

"...It works well...." Read more

"...Having said that it met my space requirements and should work well. I just hope the code inspector doesn't want to take to cover off..." Read more

"...This could work in many applications and its built well. Now, time to order some wood putty and fix all the mistake holes.! Wish me luck.!" Read more

"...it 5 stars because it's sturdiness and weatherproof features, it worked perfectly but installation wasn't easy due the 6 AWG wire I used, I'm sure..." Read more

44 customers mention34 positive10 negative

Customers find the installation process of the electrical housing to be easy. They mention that the top comes off, making installation simple. Some reviewers also say that the box snaps in place easily. Overall, customers are satisfied with the ease of installation of the product.

"...Completing the assembly was not that difficult after the wires were securely attached to receptacle...." Read more

"...The cover did stick slightly when I took it off but snaps in place easily.Overall this is a great product." Read more

"...Install was straight forward but it was difficult to push 6gauge wire into the little box during installation...." Read more

"...The inlet box is industrial quality and super easy to install. I've already recommended them to friends." Read more

20 customers mention18 positive2 negative

Customers are satisfied with the value of the product. They mention that it is a great product at a fair price and a good buy.

"...Highly recommended with all that crazy weather everywhere, Best price too. Paid $60 total. Thanks." Read more

"...When I plug in the generator it works well. Nice and study, good buy." Read more

"...Solid and Reliable, worth the price" Read more

"Great product for a great price." Read more

13 customers mention10 positive3 negative

Customers like the connectivity of the electrical housing. They mention that it's a good connector, perfect hook up for a 50 amp generator, and excellent for using on for any hook ups. It's easy to mount and has a solid connection. Some customers also say it'd be a great addition to their 10kw generator.

"Excellent for using on for any hook ups like your generator etc. makes it easy to push in and twist and it’s good all weather protection" Read more

"...Connection is secure and the spring loaded cover seals perfect. Only issue I had was it was a little tight for the gauge I used...." Read more

"Good for generator connection point!" Read more

"...the device and the back of the enclosure making it very difficult to connect to #6 conductors and then fold them into the box...." Read more

10 customers mention10 positive0 negative

Customers are satisfied with the water resistance of the electrical housing. They mention that it's sturdiness and weatherproof features make it safe and stays dry during the rain. The door also provides some shelter from the pouring rain for the cable and the waterproof plug. The finish is durable.

"...This door also provides some shelter from the pouring rain for the cable and coupled with the tight seal of the connector assembly eliminates any..." Read more

"...makes it easy to push in and twist and it’s good all weather protection" Read more

"I like that this box comes with the flip lid, with weatherproofing foam...." Read more

"I'm giving it 5 stars because it's sturdiness and weatherproof features, it worked perfectly but installation wasn't easy due the 6 AWG wire I used,..." Read more

12 customers mention4 positive8 negative

Customers are mixed about the appearance of the electrical housing. Some mention that it looks good on the side of the house because of the size and seems to work, while others say that it was poorly designed and difficult to cover.

"...This is quality made also, but just poorly designed." Read more

"The box and inlet itself look nice enough and I'm sure that they work just fine, however when torquing the terminals to the listed spec (35 in/lbs),..." Read more

"...In summary: flimsy, poor design...." Read more

"...It is a terrible flaw in design , how UL approved this model is beyond me ...." Read more

63 customers mention13 positive50 negative

Customers have issues with the size of the electrical housing. They mention that the box is a little tight when wiring the inlet, and there is too little room in the unit for wiring with the necessary wires. The cover set screw is tiny and stripped out on receipt. There is very little room between the back of the device and the back if the enclosure, making it difficult to manipulate the wires and secure the cover.

"...we were using 6awg wire and like the other reviews said, it is a tight fit and takes some time to get the wire to bend enough to close the lid...." Read more

"The holes that receive the wire are too small to accept AWG 8 wire which is typical for 50 AMP wire.Other brands have larger holes...." Read more

"...Second, as others have stated, it is a bit tight to get the 6 gauge wires in there and get cover secured...." Read more

"...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..." Read more

50 amp Generator Inlet Box
4 Stars
50 amp Generator Inlet Box
Great addition to hooking my generator to my house for power outages. I went with this 50 amp inlet box because I wanted to take full advantage of my 10,000 watt generator if it was needed. I used 6/3 wiring from the inlet box to the breaker panel with an interlock device. The 6/3 wire was very difficult to attach to this inlet box as it is so stiff it hardly bends at all. They don't give you a lot of room to close it all up when the connections are made. The front has the top attached and has to be slid on first making it very hard to get on. When I finally got it all together it is very nice. My 50amp generator cord is very easy to connect to the inlet and I can now power most of my house in an outage. I have it installed under an elevated deck and it is covered so I can't comment on how weatherproof it is but it looks like it would be as it has a rubber seal on the lid.
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Top reviews from the United States

Reviewed in the United States on September 23, 2023
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Reviewed in the United States on January 26, 2024
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Reviewed in the United States on February 3, 2024
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Reviewed in the United States on August 23, 2022
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17 people found this helpful
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Reviewed in the United States on January 23, 2014
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2 people found this helpful
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Reviewed in the United States on March 26, 2023
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5.0 out of 5 stars Great product
Reviewed in the United States on March 26, 2023
Seems very durable. The cover did stick slightly when I took it off but snaps in place easily.
Overall this is a great product.
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One person found this helpful
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Reviewed in the United States on December 23, 2023
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Reviewed in the United States on October 28, 2023
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Top reviews from other countries

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Roger Bagnarol
5.0 out of 5 stars Great product
Reviewed in Canada on January 3, 2022
Style: Inlet BoxVerified Purchase
Rosa
5.0 out of 5 stars As advertised
Reviewed in Canada on December 20, 2023
Style: Inlet BoxVerified Purchase
Luc Richardson
5.0 out of 5 stars Good product.
Reviewed in Canada on October 13, 2021
Style: Inlet BoxVerified Purchase
Uwe H.
4.0 out of 5 stars wiring space
Reviewed in Canada on April 13, 2020
Style: Inlet BoxVerified Purchase
Robert Anctil
5.0 out of 5 stars Très bon produit me sert pour une Génératrice.
Reviewed in Canada on January 3, 2020
Style: Inlet BoxVerified Purchase
2 people found this helpful
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