Model # PB20

Internet #202216492

Reliance Controls 20-Amp Power Inlet Box,

Reliance Controls

20-Amp Power Inlet Box,

$5231 /each
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Product Overview

This 20 Amp power inlet box is designed for outdoor use and can be hardwired directly to a manual transfer switch or transfer panel, eliminating need for cords running through windows or doors. This raintight unit includes an NEMA L14-20P flanged inlet plug, inlet cover, four combination 1/2-and 3/4-inch knockouts, one on each side, bottom and back. The power inlet box is rated for 20A@125/250VAC. The exclusive patented design provides generous wiring space and facilitates rough-in.

  • NEMA L14-20 configuration
  • Removable face for fast installation
  • cULus Listed
  • 5 year warranty

Info & Guides

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Product Depth (in.)
Product Height (in.)
Product Width (in.)


Electrical Product Type
Maximum Amperage (amps)
Product Weight (lb.)
Voltage (volts)

Warranty / Certifications

Certifications and Listings
1-UL Listed
Manufacturer Warranty
5 years

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Customer Questions & Answers

Do you have other modles

Asked by: Anonymous
Most of the local HD stores in my area only stock the 30A (Reliance PB-30) model. The 20A (PB-20) I had to get from
Answered by: Bradleyjl
Date published: 2015-09-17

Is this unit weather proof while in use or only when closed?

Description says water tight but cover does not close over the plug while in use like most outdoor weather proof boxes.
Asked by: KC
Water will not get in even when the cover is open and a connector is inserted. This inlet box does not have a cover that closes over the connector because those "while in use" requirements apply only to power outlets, not to inlets like this one.
Answered by: RelianceControlsAnswers
Date published: 2016-09-06

electrical recepticles

I am searching for a male plug to mount to the outside of a cargo trailer to plug and extension cord into to power a charger/maintainer.
Asked by: George
This product is a power inlet box intended to connect a portable generator to household wiring. It is probably not appropriate for your application.
Answered by: RelianceControlsAnswers
Date published: 2016-05-25

Can it handle 30A? Is that legal?

I want to put in 30 amp wiring ready to use either a 20 or 30 amp generator. I can find a twist-lock adapter to hook a 30 amp generator to a 20 amp connection, always in stock along with the cords by the generators, but I don't see an adapter for hooking a 20 amp generator to a 30 amp house connection. That would seem to imply that I need to install a smaller inlet like this, if it can legally handle 30 amps, and use the 30-amp-source-to-20-amp-sink adapter. What's the best way to go?
Asked by: outbacker
Do not connect a 30 amp generator to a cord or inlet box rated for 20 amps. For an installation that can use any generator up to 30 amps, install a 30 amp power inlet box (Reliance Controls model PB30, internet no. 202213702) and 10 AWG wire. To connect a 20 amp generator to the 30 amp inlet box there are a couple options. First, many 20 amp generators have a four conductor outlet rated at 30 amps. In this case all you need is a standard 30 amp cord. If the four conductor outlet on the generator is 20 amps there are two options: 1. Use a 20 amp cord and replace the connector on the inlet box end with a 30 amp connector that matches the inlet box (internet no. 202216503), or 2. Use a 30 amp cord and replace the plug on the generator end with a 20 amp connector that matches the generator (internet no. 202216502).
Answered by: RelianceControlsAnswers
Date published: 2016-05-12
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Customer Reviews

20-Amp Power Inlet Box, is rated 4.9 out of 5 by 7.
Rated 5 out of 5 by from Good Purchase experience. Good Quality Power Box. Speedy delivery and impressive return options. Very satisfied with this item.
Date published: 2011-12-07
Rated 5 out of 5 by from easy to order on time delivery! This web site isite is so easy to navigate!! Product was top of the line, reliance. Home depot restocks a lot quicker than Lowes.More helpful too. Quick shiping
Date published: 2011-10-04
Rated 5 out of 5 by from Well made,easy to install. Inlet box is perfect, easy to install on wall as well as installation of wiring.
Date published: 2011-12-14
Rated 5 out of 5 by from It was as good as stated. No issues. Would order this product again. Ordered and received within two weeks. Excellent service.
Date published: 2012-01-03
Rated 5 out of 5 by from Excellent Quality This is a very nice power inlet box. It is fairly small in comparison to some that I have installed and is of a higher quality. It makes for a nice clean looking installation for connecting your generator cable. I just wish they would bring the price down...
Date published: 2013-11-08
Rated 5 out of 5 by from Exactly what I was looking for! The area I live in, the electricity goes out WAY to much. Connecting these inlet boxes to my main electric box and outside makes things alot easier when I have to use my generator.
Date published: 2011-09-27
Rated 4 out of 5 by from Product satisfied my requirments Product worked well. HD had the part in stock. Shipping was quick
Date published: 2012-02-14
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