JUNCTION BOX

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LEADING JUNCTION BOX MANUFACTURER

WILLELE supplies high-quality junction boxes engineered for clean wiring, secure connections, and fast installation. Our waterproof junction box line uses durable ABS/PC enclosures with molded gaskets and stainless hardware to keep moisture and dust out, while internal bosses and cable routing features simplify assembly. Options include clear-cover lids, hinged doors, and models pre-drilled or cable-gland ready for quick terminations.

All products are available in multiple sizes and IP ratings (up to IP65/IP66/IP67 depending on model) and meet CE & RoHS requirements. Select outdoor junction box versions with UV-stabilized material for sun-exposed installs, or flame-retardant grades for equipment rooms.

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Compliant with Global Safety Standards

Our Junction Box Product Range

Discover WILLELE’s selection of plastic junction boxes designed for reliable field connections and neat finishes. Every enclosure supports tidy wiring, consistent sealing, and easy mounting—ideal for lighting, HVAC, PV strings, sensors, machinery, and control panels.

Why Choose Willele

WILLELE designs and manufactures junction boxes for safe, durable, and efficient cable connections—indoors and outdoors. From compact inline housings to wall-mounted enclosures with hinged or clear lids, our IP-rated boxes keep moisture, dust, and UV at bay while simplifying installation for contractors and panel builders.

  • Proven Quality & Compliance
    UV-stabilized PC/ABS housings, molded gaskets, and stainless fasteners. Boxes are tested for IP65/IP66/IP67 sealing and IK impact levels, with CE/RoHS documentation available on request.
  • Complete Portfolio
    One source for surface and flush models, round and rectangular footprints, clear or opaque lids, hinged or screw-cover styles, plus options for terminal blocks, cable-gland kits, vents, and labeling.
  • Engineering-Led Protection
    Tight-tolerance tooling, gasket grooves, and optional pressure-equalization vents deliver long-term sealing against water, dust, saline mist, chemicals, and UV—ideal for harsh environments.
  • Fast, Clean Installation
    Pre-marked knockouts, gland-ready entries, captive screws, and internal mounting bosses (DIN-rail option on select sizes) reduce install time and keep wiring neat and serviceable.
  • Responsive Service & Value
    Application guidance, CAD files, samples, custom cut-outs, and private-label support help you deploy the right junction box quickly—performance you can trust at a competitive cost.
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Junction Box Technical Specifications & Material Properties

Superior Materials
(ABS / Polycarbonate)

Built from high-grade ABS and polycarbonate, our plastic junction box range delivers excellent dielectric strength and impact resistance while keeping weight low. UV-stabilized grades are available for outdoor junction box applications, and flammability options can be selected for equipment rooms.

PC VS ABS

Comprehensive Specifications

We offer a full set of sizes and IP options so you can match the enclosure to the environment— from compact sensor splices to large field connections. Models include IP65 junction box and higher (model-dependent), clear or opaque lids, screw-cover or hinged cover junction box styles, and versions pre-drilled as a cable gland junction box for faster installation.

Precision Finish

Tight-tolerance tooling, molded gasket grooves, and captive screws produce a smooth, burr-free finish. Clear-cover options let you check status without removing fasteners, ideal when the waterproof junction box must remain sealed.

DIN rail terminal block

Secure Mounting

Integrated wall tabs and internal bosses support surface mounted junction box installations. Internal rails/stand-offs keep terminations tidy and away from the lid—useful for weatherproof electrical junction box layouts where gasket compression must remain even.

Specify Your Junction Box

IP65–IP67 ABS/PC enclosures with cable glands, clear/hinged lids—ready for indoor & outdoor installs.

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More Than a Junction Box Supplier

We don’t just ship enclosures—we help you build safe, sealed, and serviceable connections. From model selection to custom cut-outs and on-time delivery, WILLELE keeps your project moving.

Expert Consultation

From small sensor splices to outdoor control points, our engineers assess IP/IK rating, temperature, chemicals/UV, cable OD and entry count, and mounting method. We recommend material (ABS vs. polycarbonate), lid style (clear, hinged, screw-cover), and hardware to match your site conditions.

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Product Selection Recommendations

Share overall size, hole pattern, cable-gland thread, and terminal requirements. We return exact part numbers with options for glands/vents, terminal blocks, DIN rail or backplate, labels/laser marking, and custom cut-outs—typically with pricing and lead time in under 12 hours.

Logistics & Shipping Support

We handle export paperwork, HS codes, and compliance packs (CE/RoHS). Packaging is drop-tested; cartons and pallets are configured to your Incoterms with clear ETAs, tracking, and neutral OEM packaging available on request.

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Guidance & Support

During installation we advise on strip lengths, tightening torque, end-clamp spacing, bridging and marking schemes, and DIN-rail or panel mounting. For larger projects we offer remote start-up help or on-site assistance.

Knowledge About Junction Boxes

What Is a Junction Box?

A junction box is an enclosure that protects and organizes electrical connections. Typical terms you’ll see are electrical junction box, waterproof junction box, and outdoor junction box. Housings are commonly plastic (ABS or polycarbonate) with gasketed lids to keep out dust and water. See the Installation Guide and the page-end FAQ.

Main Applications
  • Lighting splices, sensor/actuator terminations, and CCTV/IoT drops
  • Solar PV strings, low-voltage control, and field device wiring (DC/AC)
  • Outdoor auxiliaries on facades, rooftops, and machinery skids
  • Upgrades where a surface mounted junction box or wall mounted junction box is required
IP Ratings & Materials

Select the enclosure to match the environment: IP65 junction box for dust-tight and water-jet protection, IP66 junction box for heavier jets, or IP67 junction box where brief immersion may occur. For material, an ABS junction box offers great value indoors; a polycarbonate junction box (PC) provides better impact and UV resistance outdoors.

Covers, Seals & Hardware

Choose a clear cover junction box for visual checks, or a hinged cover junction box for frequent access. A gasketed junction box with captive screws maintains the seal; verify even compression after closing.

Cable Entry & Accessories
  • Junction box with cable glands (or a cable gland junction box) speeds sealed entry—match gland thread and cable OD.
  • Pre-marked knockouts: junction box with knockouts for fast drilling and positioning.
  • Internal options: terminal junction box / terminal block junction box for neat terminations.
  • Use blanking plugs for any unused holes to keep the IP rating.
Mounting & Orientation

For outdoor use, mount the enclosure upright so water sheds away from the lid. Keep spacing behind a surface mounted junction box to avoid gasket distortion. External hardware and wall anchors should be corrosion-resistant.

Sizing & Space Planning
  • Small runs: small waterproof junction box for 1–2 glands and a compact terminal strip.
  • Multi-circuit: large waterproof junction box leaves 20–30% spare space for bend radius and labeling.
  • Form factors: rectangular, and round waterproof junction box for tight ceiling/fixture spaces.
How to Select the Right Junction Box

Use this quick checklist for junction box selection before ordering:

  • Environment: pick IP level (IP65/IP66/IP67) and UV resistance for an outdoor junction box.
  • Material: plastic electrical junction box (ABS for value, PC for impact/UV).
  • Cover: clear vs opaque; hinged vs screw-cover.
  • Entries: number/size of glands, thread type, and knockout positions.
  • Interior: terminals, DIN/backplate, and labeling; allow service space.

Need a quick match? Tell us cable OD, entry count, and IP level in the RFQ.

Specs, Standards & Safety
  • Ratings: confirm temperature range, IP/IK class, and any flame rating on the datasheet.
  • Sealing: use the correct gasket, torque sequence, and matched glands to maintain protection.
  • Chemicals: check compatibility (salts, acids/bases, oils, cleaners) with the plastic and gasket.
  • Grounding: bond any metal hardware per local code; keep creepage/clearance around live parts.
Installation Best Practices for Junction Boxes
  • Plan gland positions; deburr any custom holes and fit glands to the correct cable OD.
  • Dress conductors; keep bend radius and strain relief inside the box for serviceability.
  • Evenly tighten lid screws to compress the gasket; avoid over-torque that can warp plastic.
  • In humid or high delta-T sites, add a vent or desiccant to manage condensation.
  • Label circuits and record torque/entry sizes for future maintenance.
Read the FAQ Request Sizing & IP Selection Help

Junction Box FAQ

Is an IP65 junction box OK outdoors?
Yes—an IP65 junction box is dust-tight and resists water jets, so it suits most outdoor junction box locations under rain and splash. Use matched cable glands or blanking plugs on every entry and tighten the lid evenly so the gasket seals properly. For heavy washdown, consider IP66; for brief immersion risks, choose IP67.
When should I choose IP66 or IP67?
Select an IP66 junction box when powerful jets or wind-driven spray are expected. Choose an IP67 junction box where short-term submersion is possible. Both provide a watertight junction box when the correct glands are used and the gasket is maintained.
ABS vs polycarbonate—what’s the best plastic?
An ABS junction box offers great value for indoor/light-duty outdoor use. A polycarbonate junction box (PC) has higher impact strength and better UV stability, making it the preferred plastic electrical junction box for sun-exposed or cold climates.
Do I need a cable gland junction box? How do I size glands?
For sealed entries, specify a cable gland junction box or a junction box with cable glands. Match the gland thread (e.g., M20, PG13.5) and select the seal range by the cable outer diameter. Unused knockouts must be closed with approved plugs to keep the IP rating.
Can I use a clear cover junction box in direct sunlight?
A clear cover junction box made from UV-stabilized polycarbonate is suitable for sun exposure and allows quick visual checks without removing fasteners. For harsh UV, choose a uv resistant junction box grade and avoid solvents that may craze PC.
What’s the benefit of a hinged cover junction box?
A hinged cover junction box speeds frequent inspection and reduces wear on the seal. Hinges keep the cover captive and the assembly gasketed, lowering the chance of lost screws on site.
How do I mount a surface mounted junction box on a wall?
Use corrosion-resistant fixings and all mounting points on the back or tabs of a surface mounted junction box. Keep the enclosure vertical so water sheds from the lid, and leave space behind cables to prevent gasket distortion— the standard method for a wall mounted junction box.
Do you supply terminal block junction boxes?
Yes—we offer terminal junction box configurations with internal DIN/backplate or screw terminals. A terminal block junction box keeps wiring neat, speeds testing, and shortens installation time on lighting, sensors, and control circuits.
What size should I pick—small vs large waterproof junction box?
For compact splices, choose a small waterproof junction box sized for the gland count and terminal pitch; allow 20–30% spare space for bend radius and labeling. Multi-circuit projects benefit from a large waterproof junction box with room for service loops and future additions.
Is the junction box suitable for DC, low-voltage lighting, and sensors?
Yes—use a dc waterproof junction box for PV strings and controls, and a low voltage junction box waterproof for LED drivers or data lines. For fixtures/detectors, pick a lighting junction box waterproof or sensor cable junction box with the correct gland sizes and strain relief.

Request a Custom Junction Box Quote

WILLELE builds OEM/ODM junction boxes to your spec — IP65/IP66/IP67 sealing, ABS or polycarbonate housings, clear or hinged lids, and cable-gland–ready entries. Add options such as internal terminal blocks, DIN/backplate, vents, labeling, and pre-wiring. Tell us dimensions, entry count & thread, cable OD, and the environment (UV/chemicals/temperature) for the fastest match.

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