Product images: Amazon listings
Written from the listing's specs, not from our own use · How we rate
If you're after a 30 amp inlet, the Reliance Controls PB30 30A Inlet Box delivers, with a weatherproof cover on top. Think of it for a proper hookup to the house panel: 6.0/10 on what its listing documents.
| Brand | Reliance Controls |
|---|---|
| Category | Covers, cords & accessories |
| Amp rating | 30 A |
| ASIN | B000BQT47S |
Full listing title: Reliance Controls Generators Up to 7,500 Running Watts PB30 30-Amp NEMA 3R Power Inlet Box, Gray
Rated from the listing's specs, no buyer reviews yet
What it's made for: a proper hookup to the house panel.
Two power inlet boxes with the same amp rating, closest to it on our rating, each with a dated price.
The rating the listing states. It has to match the cord and the biggest outlet on your generator: a 30 amp inlet won't pass a 50 amp generator's full output.
What it has going for it
30 A inlet. The weatherproof socket on the outside wall where the generator cord plugs in. An electrician wires it to a transfer switch or an interlock, and you never backfeed through a dryer outlet.
Weatherproof box. It lives on the outside wall all year, so the cover and its rating (NEMA 3R where stated) matter.
The Reliance Controls PB30 30A Inlet Box is the socket on the outside wall, rated 30 A, per the listing. Indoors it feeds either an interlock kit on the main panel or a manual transfer switch.
An interlock is cheaper and leaves every breaker available; you manage the load yourself. A transfer switch puts a set list of circuits on the generator, which is simpler on the night. Either way, a licensed electrician wires it.
What the Reliance Controls PB30 30A Inlet Box listing names:
Check these figures against your generator's manual before you order.
On Sep 30, 2026, that price put it in the pricier third of the 11 power inlet boxes we have a recent price for.
Count the electrician and, where your town asks for one, the permit on top: the hardware is the cheap part.
The button opens the exact listing (ASIN B000BQT47S), where today's price, stock and seller apply.
Running a 50 amp generator? The SURAIELEC 50A Inlet Box (7.4/10) is rated 50 A.
Want to spend less? The Marsflex 30A L14-30P Inlet Box (7.2/10) was listed at $25.79 on Sep 30, 2026.
Our take
The Reliance Controls PB30 30A Inlet Box earns its place with a 30 amp inlet and a weatherproof cover. No buyer reviews yet, so this Reliance Controls power inlet box has to win you over on paper. The catch with the Reliance Controls: one wrong plug code and nothing connects, so check both ends first. We'd pick it if you want a clean, legal hookup to the panel; otherwise, put it next to the Kanayu 30A L5-30 Inlet Box first.
Before the Reliance Controls PB30 30A Inlet Box goes in your cart, check the plug code: it is rated 30 A, and the cord and the generator outlet have to match.
Read the outlet code on your generator panel and the inlet box (L14-30, L5-30, 14-50, SS2-50, TT-30); they are not interchangeable.
An inlet box connects to a transfer switch or an interlock, wired by a licensed electrician. Our interlock vs transfer switch guide compares both.
It is rated 30 A. The cord, the inlet and the switch should all carry the same rating as the generator outlet you use.
How the Reliance Controls PB30 30A Inlet Box stacks up against the closest alternative, the Kanayu 30A L5-30 Inlet Box.
| Criterion | Reliance Controls PB30 30A Inlet Box | Kanayu 30A L5-30 Inlet Box |
|---|---|---|
| Our rating | 6.0/10 | 6.8/10 |
| Rating | 30 A | 30 A |
| Plug | Not stated | L5-30 |
Pick the Kanayu 30A L5-30 Inlet Box if you want our higher-rated option (6.8/10).
We rate it 6.0/10 (fair). The rating comes from its documented listing alone, as no customer-review record is captured yet.
Only if your generator manual confirms it. Check the outlet or plug type, the amperage, the list of supported models and any adapter the manual asks for; looking similar is no proof that it fits.
Its listing states a 30 amp inlet and a weatherproof cover. These are the seller's figures, not our measurements: whether it fits your exact generator is worth confirming first.
Match the plugs: read the outlet code on your generator panel and the inlet box (L14-30, L5-30, 14-50, SS2-50, TT-30); they are not interchangeable. Plan the install: an inlet box connects to a transfer switch or an interlock, wired by a licensed electrician. Our interlock vs transfer switch guide compares both. The amp rating: it is rated 30 A. The cord, the inlet and the switch should all carry the same rating as the generator outlet you use.
We link to the exact listing on Amazon, where today's price, stock and seller apply. It is an affiliate link, and it has no effect on the rating.
No, we haven't used it ourselves. Everything on this page comes from its listing, read line by line and weighed with our published formula, plus our editors' read of how it compares with its rivals.