Shopping security
When you're dealing with the relentless exposure of saltwater spray, deck vibrations, and unpredictable weather on your boat, standard junction boxes just won't cut it. The Newmar PX-1 waterproof junction box steps up as a reliable workhorse, designed specifically for making secure wiring connections above or below decks. Crafted from high-impact polypropylene that's both rugged and non-corrosive, it shrugs off the marine environment like a seasoned sailor handles a squall.
What sets the PX-1 apart is its thoughtful engineering for real-world use. The snap-on cover creates a watertight seal that keeps moisture out, earning it an IEC IP54 rating—meaning it stands strong against water jets from any direction without flinching. Those universal cut-to-fit cable entries? They're a game-changer, accommodating cables from 0.14 to 0.81 inches (3.5-20.5 mm) by simply trimming to size, so you get a snug, drip-proof fit every time.
Pro tip: For optimal performance, always route cables with a slight downward angle away from the box to let any condensation drain naturally. This simple step enhances longevity in humid bilge areas.
Setting up the PX-1 is straightforward—no special tools required beyond a utility knife for cable entries and a screwdriver for terminals. Mount it securely using the built-in flanges, then:
Common pitfall to avoid: Over-tightening terminals on finer wires, which can damage strands. Aim for firm but gentle—test continuity before sealing up. In spray-prone spots like radar arches or swim platforms, pair it with chafe guards on cables for extra defense.
While the PX-1 shines in boating—think nav lights, bilge pumps, or electronics feeds—its toughness extends to RVs, jet skis, and outdoor equipment. Users rave about its reliability in setups exposed to washdowns or rain, where lesser boxes fail and lead to shorts or corrosion.
Compared to the larger PX-2 or PX-3 models in the series (which offer more positions and entries for complex harnesses), the PX-1 is your go-to for single-circuit jobs or space-constrained installs. It's all about matching capacity to need without excess bulk.
Minimal upkeep is key to its appeal. Periodically inspect seals for wear, especially after heavy spray exposure, and reapply silicone grease if needed. In storage, store covers snapped on to prevent debris buildup. If you're rewiring, label circuits beforehand—those 6 positions fill up fast on multi-branch runs.
Its IP54 waterproof rating, non-corrosive polypropylene construction, and watertight snap-on cover protect against spray, salt, and impacts above or below decks.
Yes, universal cut-to-fit entries accommodate cables from 0.14 to 0.81 inches (3.5-20.5 mm), with 5 ports including spares.
Absolutely—pre-installed connector strips with captive screws comply with ABYC requirements for secure, vibration-resistant connections.
It features one strip with 6 positions for up to 16-gauge wire, ideal for most DC circuits like lights or pumps.
Yes, direct cable entries make it plug-and-play, but knockouts allow conduit addition for protected runs.
PX-1 is compact for simpler jobs (6 positions), while PX-2/PX-3 offer more strips/entries for bigger setups.
Definitely—great for RVs, outdoor lighting, or any wet-area wiring needing durable, waterproof protection.
Waterproof Junction Boxes
Specifications
| Model | PX-1 | PX-2 | PX-3 |
| Number of Connector Strips | 1 | 2 | 2 |
| Positions per Strip | 6 | 6 | 9 |
| Max Wire Gauge | 16 | 16 | 16 |
| Number of Cable Entry Ports | 5 | 7 | 7 |
| Number of Cable Entries Installed | 3 | 7 | 7 |
| Spare Cable Entries Provided | 2 | 0 | 0 |
| Cable Diameter Range (inches) | .14-.81 | .14-.81 | .14-1.0 |
| Cable Diameter Range (mm) | 3.5-20.5 | 3.5-20.5 | 3.5-25.5 |
| Box Size Inches | 2.95 x 2.95 x 1.66 | 3.35" x 3.35 x 1.66 | 4.45 x 4.45 x 2.29 |
| Box Size Centimeters | 7.5 x 7.5 x 4.2 | 8.5 x 8.5 x 4.2 | 11.3 x 11.3 x 5.8 |
Ships within 48 hours · Estimated delivery Aug 14 - Aug 19
US$40
Get nowSign up to your membership to get coupons up to
15%
Get nowOpportunity to enjoy order discount up to 15% off
Top-Converting Item to Boost Your Average Order
/eh/2025-01-08/173633966714069467/picture.png)
/eh/2024-12-24/173503345348979036/Favorite-Icon.png){kind=icon}
/eh/2025-07-08/1751962110204480194/picture.png)
/eh/2025-06-21/1750485478958537574/countryInfoIcon.png)
/eh/2025-06-21/1750485741321434291/Hi-Sign-in-My-Nihao.png)
/eh/2025-06-21/1750485837193896318/cart.png)
/eh/2025-06-21/1750485968202533847/cart.png)
/eh/2025-04-17/1744862476612819675/hot-img.png)
/eh/2025-11-07/1762504524550532584/header-icon.jpg){kind=icon}
/eh/2025-07-07/1751875582852206790/header-icon.png){kind=icon}
/eh/2025-07-07/1751875587886277738/header-icon.png){kind=icon}
