Why Choose Jushun as Your Junction Box Supplier in China?
- With over 20 years of experience in sheet metal enclosures manufacturing, Jushun is your trusted junction box manufacturer in China.
- We offer strong OEM and ODM capabilities (customizable dimensions, materials, mounting methods, and accessories).
- We can handle large-scale production with short lead times, and our export packaging meets international standards.
- Quality assurance: NEMA and IP-rated enclosures
- Customizable accessories (hinged covers, screw-down covers, transparent covers, and knockouts)

Junction Box
- Material: Steel /Aluminum
- Optional Accessories: Transparent Cover, Screw-On Cover, Hinged Cover, Knockouts
- Surface Treatment (Powder Coating, Anti-Corrosion Coating, etc.)
- OEM/ODM Services (CAD Drawings and Sample Development Support)
- Standards & Certifications
- NEMA 1 / 3R / 4 / 4X / 12
- IP65 / IP66 / IP67
- CE / RoHS / UL
What is the purpose of a junction box?
To us custom enclosure manufacturers, a junction box is essentially a type of electrical enclosure. However, a junction box also has its own unique function: protecting indoor, outdoor, and underground wiring from environmental influences. Because operators can’t always monitor the wiring, damage, whether human or natural, is often unpredictable. Fire, moisture, and external damage are crucial. This is where the protection of an enclosures comes in.
Junction Box Applications
Outdoor Lighting
Security camera housing
Transportation Equipment
Industrial Automation
Solar Equipment
Feature Box
Moisture-proof
Security
Assembleable
Fire
prevention
Impact -resistant and durable
Weather and hazard resistance
Types We Offer
- Metal Junction Enclosure
- Wall-Mount Junction Box
- Pole-Mount Junction Box
- Hinged Junction Enclosure
- Waterproof Junction Casing (Outdoor Use, NEMA / IP Rated)
Metal Junction Box or Plastic Junction Box?
Metal :
Jushun specializes in producing metal junction boxes. Our cabinets are suitable for various industrial, outdoor and heavy-duty environments. Also,metal has a good performance in hard-wearing, anti-corrosion, fire resistance, impact-resistant. What’s more, our grounded electrical enclosures reduce the risk of electric shock and fire hazards.


Plastic :
Of course, if you are dealing with indoor, small circuits, then the lightweight, rust-proof, and economical plastic junction box is also a good choice. But it is worth noting,some types of non-metallic casings do not adhere to grounding regulations and local building codes, and some can’t handle the generated heat.
What Is the Difference Between an Enclosure and a Junction Box?
As mentioned above, a junction box is a type of electrical enclosure, but its purpose is more specific: to protect wire connections or cables. Therefore, Jushun’s junction boxes prioritize material durability. However, electrical enclosures have a wider range of uses. Because electrical enclosures sometimes need to house various important devices, we need to adjust the cabinet’s material, size, and thickness based on the specific needs of each device.

FAQs
Can I customize the size and knockouts of the box?
Of course, we will provide a series of customized services and communication before design and production. In order to facilitate transportation, we can also provide installation services before packaging.
Do your junction boxes meet UL/CE standards?
Our customized customers have different requirements for certificates, but please rest assured that we can send the products to relevant institutions for inspection according to your needs and apply for the certificates you need.