Newmar PX-3 Waterproof Polypropylene Junction Box

The Newmar PX-3 Junction Box is a waterproof polypropylene enclosure with two nine-position connector strips using screw-compression terminals.

Screw-compression terminals with brass barrels capture the wire without needing separate lugs. A stainless-steel plate presses the conductor rather than the screw bearing directly on it, which is what stops strands being cut and the connection loosening over time.

Eighteen positions across two strips covers a substantial junction in one box. That suits a distribution point where several circuits branch, rather than a simple two-wire joint.

High-impact polypropylene is non-corrosive, suiting locations exposed to occasional spray above or below decks. The cast-aluminum BX-3 is the alternative where shielding matters near radio equipment, and the choice depends on which problem the position presents. Explore more wire connectors and terminals.

• Screw-compression captures wire without lugs
• A steel plate presses the conductor, not the screw
• That stops strands being cut and loosening
• The BX-3 shields; this one resists corrosion