Weatherproof Boxes

Weatherproof boxes are sealed electrical enclosures that protect outdoor and wet location wiring, devices, and connections from rain, dust, and corrosion. This category covers cast and nonmetallic boxes, FS and FD boxes, and the gasketed covers that keep them rated.

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Weatherproof Box Selection Guide

A weatherproof box is only as good as its rating and its cover, so the job is matching the enclosure and the gasketed lid to the exposure. These boxes are part of the Electrical Boxes and Fittings family alongside standard Electrical Boxes and Conduit Fittings. For the connectors and lugs that terminate the wiring inside, see Ground Clamps and the Controls and Devices catalog.

Match the Box to the Location

Match the enclosure type and cover to how wet and exposed the location is.

Box TypeMaterialBest FitCover
FS and FD boxesCast metalConduit systems outdoorsWeatherproof device cover
Nonmetallic weatherproofPVC or polymerCorrosive and coastal areasGasketed cover
In use cover boxMetal or polymerOutdoor receptacles in useBubble in use cover
Junction enclosureCast or nonmetallicSplices and pullsBlank gasketed cover

Ratings, Covers, and Sealing

The enclosure rating and the cover together set the protection: a weatherproof box needs a gasketed cover and sealed entries to hold its rating. Outdoor receptacles that stay plugged in require an in use, or bubble, cover that keeps the connection protected while a cord is attached, which code requires in wet locations. Confirm the rating matches the exposure, and use the correct gaskets and sealed hubs at every entry.

Material and Conduit Entries

Cast metal FS and FD boxes suit standard outdoor conduit runs, while nonmetallic boxes resist corrosion in coastal and chemical areas. Match the number and size of hubs to the conduit entering, and keep unused openings sealed. For the conduit and fittings that connect to the box, see Conduit Fittings, and for mounting lighting on the box, confirm the cover supports the fixture weight.

Why Order Weatherproof Boxes from QuickShipLights

Each product page shows live stock status, in stock boxes ship fast, and freight is free on every order with no minimum. For help matching a box, cover, and hubs to an outdoor location, reach the lighting team through the QuickShipLights support portal before you order.

Frequently Asked Questions About Weatherproof Boxes

A weatherproof box is a sealed electrical enclosure that protects outdoor and wet location wiring, devices, and connections from rain, dust, and corrosion. It keeps its rating only with a gasketed cover and sealed entries.

Both are cast weatherproof boxes for conduit systems. An FS box is shallow and an FD box is deep, giving more interior volume for devices and wiring. Choose the depth based on what mounts inside.

Yes. In wet locations, receptacles that stay plugged in require an in use, or bubble, cover that protects the connection while a cord is attached. A standard flip cover is not enough for a cord left plugged in.

Nonmetallic PVC or polymer weatherproof boxes resist corrosion better than metal in coastal and chemical environments. Cast metal boxes suit standard outdoor conduit runs.

Use the matching gasketed cover, seal every conduit entry with the correct hubs or fittings, and keep unused openings closed. The box only holds its rating when the cover and entries are sealed.

Yes, with the correct weatherproof cover rated to support the fixture. Confirm the cover and box are listed for the fixture weight and the wet location before mounting.