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Electrical Assembly & Panel Assembly
(Factory Pre-Wired, Ready to Install)

For complete electrical assembly with wiring, customers must provide primary (single line) and secondary wiring diagrams.

For mechanical assembly only, we require a layout drawing and BOM list.

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Professional OEM Electrical Panel Wiring, Control Cabinet Assembly, and Metal Enclosure Fabrication.

At Vililong, we provide end-to-end electrical assembly and panel assembly services for power distribution, industrial automation, machinery control, and energy systems.
All panels are factory pre-wired, fully tested, and ready to install, helping contractors, integrators, and equipment manufacturers reduce on-site labor and project costs.

With in-house sheet metal fabrication and strong OEM capability, we deliver complete solutions—from empty enclosure fabrication to full electrical assembly.

electrical-assembly

Assembly Process

1.Customer Inquiry

Provide enclosure type, specifications, and overall project requirements, including application, installation environment, and preferred components.
Our team reviews the basic information to determine the suitable enclosure and assembly approach.

2.Technical Documentation

Submit the single-line diagram (SLD), wiring diagram, layout drawing, and BOM list for evaluation.
We check completeness, confirm wiring routes, and verify compatibility of components and enclosure size.

3. Engineering Review

Our engineers analyze technical details, component specifications, and assembly standards required for the project.
If needed, we optimize layout, cable entry positions, and internal space to ensure efficient wiring and installation.

4. Quotation & Confirmation

We prepare a detailed quotation based on drawings, BOM, material selection, wiring complexity, and testing requirements.
All pricing covers enclosure fabrication, component installation, wiring, labeling, and quality control.

5. Fabrication & Electrical Assembly

Metal enclosure fabrication is completed first, including cutting, bending, welding, powder coating, and pre-cut openings.
Then we perform component installation, DIN-rail mounting, terminal block setup, cable routing, and full internal wiring.

6. Testing & Final Inspection

All wiring is completed strictly according to diagrams, with cable labeling, ferrules, and professional cable dressing.
Each panel undergoes continuity testing, function testing, torque checks, and a full final inspection before packing.

Our Electrical Assembly Capabilities

Industries We Serve

Power distribution

Industrial automation

HVAC & building management

Machinery and equipment control

Water treatment systems

Renewable energy & ESS

Electrical contracting projects

Why Choose Us

In-house metal enclosure manufacturing

Complete assembly + wiring under one roof

Cost-effective OEM service

Fast lead time for both small and large batches

Pre-wiring reduces on-site labor cost

Custom cutouts, drilling, and cable entries

Experienced engineering and QC team

FAQs About Electrical Assembly & Panel Assembly

Professional Electrical Enclosure &
Prefabricated Assembly Manufacturer

Your Reliable Partner for Power Distribution and Automation Solutions

Tell us your enclosure or assembly needs — our team will respond within 24 hours.

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