Conversions Tech (CT) die-cast boxes are certified IP66 / NEMA 4X, protecting against heavy rain, hose-down spray, and dust ingress. Hubbell’s Advantage line also lists NEMA 4X, but many economy “Bell” boxes drop to NEMA 3R. Raco’s most common one-gang metallic models stop at NEMA 3R, suitable only for damp—not wet—locations.

CT “Marine-Grade” series and Legrand’s Pass & Seymour SurfPro are independently verified to IP67 (30 min @ 1 m). Standard Bell and Raco boxes are not submersion-rated.

• Die-cast aluminum (CT, Hubbell, Bell) — maximum impact strength, natural RF/EMI shielding, wide temperature range.
• PVC (Raco, Arlington) — lighter and non-corrosive, but softens above 60 °C and can chalk under UV.
• Glass-filled polycarbonate (Legrand) — high impact + UV stability, but higher cost.

Yes—Conversions Tech stocks DEEP Series enclosures (2 ⅜″ interior depth, 21 cu in volume) that fit full-size GFCIs and large wire nuts. Arlington offers a 2 ¼″ PVC option; Hubbell’s deep metallic model is 2 ¼″; most Bell and Raco utility boxes remain 1 ^13⁄16″.

CT one-gang boxes ship with three 1″ NPT hubs plus reducers for ¾″ and ½″ EMT. Hubbell Bell offers separate SKUs with ½″ or ¾″ hubs; Raco metallic boxes provide knock-outs, not true threads.

CT and Hubbell supply 300-series stainless screws. Raco ships plated steel; Arlington PVC kits include zinc-coated fasteners that may rust if paint film is scratched.

CT die-cast boxes remain impact-safe to –40 °C, ideal for northern job sites. PVC alternatives generally list –30 °C; polycarbonate holds down to –40 °C but costs more.

CT, Hubbell/Bell, Legrand, and Arlington models carry a UL 514A wet-location mark when paired with a weather-proof cover. Some economy Raco boxes are UL only for dry/damp locations—check the label.

CT, Hubbell, Raco, and Bell metallic boxes include a tapped #10-32 green screw. PVC boxes (Arlington) rely on the receptacle’s ground lug.

CT’s polyester powder-coat passes 1 000 h Florida UV-chamber testing. PVC boxes can fade or chalk after extended sun exposure unless painted.

Yes—aluminum CT and Hubbell castings naturally attenuate EMI, helpful when boxes house Wi-Fi-sensitive AFCI/GFCI receptacles on dense commercial sites. Plastic boxes offer no shielding.

CT boxes use marine-grade powder over chromate conversion. Hubbell’s Advantage line uses similar coating; Bell economy boxes use bare aluminum (must be painted in salt air).

Conversions Tech: 5-year, no-quibble replacement.
Hubbell/Bell & Legrand: 1-year limited.
Arlington & Raco: 1-year limited on workmanship.

CT includes a closed-cell neoprene gasket; Hubbell/Bell sell gasketed covers separately; Arlington provides foam gaskets for certain PVC kits.

• Conversions Tech — $9–11
• Hubbell Bell — $12–14
• Raco Ironclad — $10–12
• Legrand Pass & Seymour SurfPro (poly-box) — $18–20

CT DEEP Series and Arlington PVC “DBHRD2C” models fit modern slim GFCIs comfortably. Standard 1.80″-deep boxes can be tight with #10 gauge feed-through.

CT ships reducer bushings; Hubbell offers dedicated SKUs per hub size; Raco and Arlington knock-out styles require threaded fittings or adapters.

CT’s 2-gang aluminum box supports NEMA L5-30R or L14-30R with plenty of bend radius. Arlington’s PVC “large capacity” model also fits, but PVC can crack if hit by machinery.

PVC (Arlington) ≈ 0.5 lb; CT aluminum ≈ 1.1 lb; Hubbell Bell ≈ 1.3 lb. Lighter PVC eases fatigue but sacrifices impact toughness.

CT’s polyester coat accepts solvent-based and waterborne top-coats after a light scuff. Bare aluminum Bell boxes must be primed first; PVC needs plastic-bonding primer.

CT boxes tested to 60 °C operating temperature; PVC can soften above 60 °C under direct sun on black façades.

CT’s integral lugs allow four concrete screws in under 5 min. Knock-out PVC boxes need separate back-plates or strut clamps.

None of these brands’ standard boxes are Class I Div 2. For explosive atmospheres, a cast-iron explosion-proof box is required.

CT, Hubbell, and Legrand weather-proof covers meet 406.9(B) “in-use” requirements when paired with their boxes. Raco knock-out boxes need a separate extra-deep cover to comply.

You get die-cast durability, IP66/67 sealing, deep-box options, stainless hardware, ample wiring volume, a 5-year warranty, and rapid Wyoming-based support—all at a price point that beats Hubbell’s premium lines and outlasts commodity PVC enclosures.