Stanley JB-1 Junction Box

Stanley JB-1 Junction Box is a rooftop PV junction box designed for composition or asphalt shingle roofs. The durable polycarbonate enclosure is rated for outdoor use and accepts conductors from 14 AWG to 6 AWG, with a maximum voltage of 600 V and a maximum current of 60 A, making it suitable for typical residential solar wiring. The box provides 1-inch maximum side-wall and floor pass-through fittings, and it requires at least 1/2 inch of clearance between uninsulated live parts and fittings to maintain safe spacing. It features a Type 3R outdoor enclosure rating, supports roof slopes from 2.5:12 to 12:12, and operates in a wide temperature range from -35°C to +75°C; it is UL1741 listed and Intertek File #5015705, with UL1741-conforming connectors. The JB-1 serves to house and protect PV wiring connections on shingle roofs, helping to simplify rooftop electrical splices while maintaining weatherproof integrity. Common applications include residential solar installations and small commercial rooftop arrays, where it pairs with standard PV connectors and gaskets to maintain a sealed junction environment.