Indoor and outdoor electrical junction boxes for splicing, distribution and DIN-rail mounting. Metal, polycarbonate and ABS bodies in NEMA 3R, 4, 4X and 12 designs with UL-listed equivalents and IP65+ ratings.
We supply five families of junction box covering indoor and outdoor wiring, panel work, and DIN-rail installations. All can be machined, printed or laser-marked to your spec before shipment.
Aluminum and steel junction boxes for industrial wiring where impact resistance, EMI shielding or higher temperature ratings are required.
ABS and polycarbonate junction boxes with high impact resistance, UV-stable bodies and a wide cutout-friendly working area.
Dust-tight, jet-resistant outdoor boxes with UL-listed NEMA 4X equivalents and corrosion-resistant bodies for prolonged outdoor exposure.
Pre-fitted 35 mm DIN-rail inside the box for terminal blocks, relays, fuse holders and small PLCs. Cutouts for cable glands and breathers.
Larger NEMA 12 and 4X junction boxes with internal mounting plates for breakers, contactors and small motor controls. Knockouts and gland plates available.
The NEMA rating decides where the box can be installed in US commercial and industrial work, and is what AHJ inspectors will read off the label. Tap a rating below to see the full definition, common use cases and the matching IP equivalent.
Open the full IP and NEMA chartPick the smallest box that accepts your cable count plus a safe 30 to 40 percent reserve volume. Cable gland count limits which size you can use as much as the inside volume does.
| Size class | Typical dimensions (W x H x D) | Cable entries | Use case |
|---|---|---|---|
| Small | 80 x 80 x 50 mm | 2-3 x M16 | 2 to 4 conductor splice, sensor branch, lighting tap. |
| Medium | 150 x 110 x 70 mm | 4-6 x M16/M20 | Multi-conductor distribution, EV charger pre-wiring, instrumentation marshalling. |
| Large | 200 x 150 x 100 mm | 6-10 x M20/M25 | Sub-distribution, motor control branch, telecoms patch. |
| Extra large | 300 x 220 x 120 mm | 8-12 x M25/M32 | Panel boxes with internal mounting plate, small switchgear, outdoor combiner. |
Dimensions shown are typical stock options. We also CNC machine custom dimensions, cutouts and gland patterns on order.
The terms are often used interchangeably but refer to different installations. Use the right word in your bill of materials so the part you receive matches the spec.
A small to medium box used to join, split or branch cables. No internal active equipment, no breakers.
A larger box with an internal mounting plate that holds breakers, contactors, relays or a small PLC.
The generic category covering all sealed boxes for electrical, electronic or control equipment, from junction boxes up to floor-standing cabinets.
Send us your drawing, cable schedule or AHJ requirements. Our US-facing engineering team recommends the right NEMA rating, UL-listed equivalent and gland layout, and quotes CNC-machined or laser-marked variants where the standard catalog does not fit.
