EZ Solar JB-3 Universal Rail/Panel Mount Solar Power Junction Box Kit | Water Resistant Rooftop Solar Junction Box for Rail-Mount Systems

Downloads

• Key Features
• Installation Manual
• JB-3 Drawings
• Spec Sheet

When you need a rail-mounted solar PV junction box, you need EZ Solar’s JB-3! With flexible stainless steel clamps, you can mount to any rail, whether rounded or squared. Like other EZ Solar products, it’s fast, simple, and built for reliability. The JB-3 provides self-leveling, secure connection, fast installation, and water-blocking design, making it the ultimate solar power junction box for exterior use.

Package Includes:

• 1 × EZ Solar JB-3 Rooftop PV Junction Box

• 10 × Easy-Twist Ceramic Wire Connectors

• 10 × Waterproof Cable Gland Fittings
  

Key Features

Universal Fit

• Works with any type of roof mount solar rail or module

• Fast install with 5/16" hex head stainless steel hose clamps or panel clamps

• Patented, UL1741, CSA C22.2 No 290, NEMA 3R

Secure Connection

• Fastens securely to rail or module with self-leveling stainless steel hose clamps or panel mount brackets

• Entry through east, south, and west sidewalls

• Revolutionary Snap-in Din Rail

Water Resistant

• Box raised off the roof to prevent water accumulation

• Built-in weep holes for condensation

• Superior quality polycarbonate

Product Specifications

Model: JB-3 PV Junction Box for Rail or Panel Mount Applications

• Maximum Voltage: 1,000 Volts

• Dimensions: 8.3 in x 0.85 x 5.8 in

• Maximum Current: 80 Amps

• Allowable Wire: 14 AWG – 6 AWG

• Maximum Number of Input Circuits: 4

• Enclosure Rating: Type 3R

• Roof Slope Range: 2.5 – 12:12

• Max Side Wall Fitting Size: 1"

• Max Floor Pass-Through Fitting Size: 1"

• Ambient Operating Conditions: -35°C to +75°C

• Compliance:

  • JB-3: UL1741, CSA C22.2 No. 290

  • Approved Wire Connectors: Must conform to UL1741

• System Marking: Intertek Symbol and File #5025824

Installation & Maintenance

• Maintain at least ½” spacing between uninsulated live parts and fittings for conduit, armored cable, and opposite polarity parts.

• During re-inspection, replace any components showing looseness, corrosion, or wear immediately.

Electrical Ratings (Typical)