North American OEM enclosure support
UL Certification Support for Custom Sheet Metal Enclosures
Build a clearer path toward UL or ETL evaluation with custom enclosures manufactured to your approved drawings, specifications, and project requirements. We help coordinate fabrication details and available production records for OEM equipment destined for North America.
Enclosuremfg supports industrial machinery, energy storage and power equipment, and electrical systems. We are a fabrication partner—not a certification body—and do not represent enclosures as UL Listed or promise approval of completed equipment.
Fabrication and documentation are aligned to your approved design and agreed project scope.
50
People across production and support
5 + 6
Mechanical/manufacturing engineers and QA/QC specialists
10–500
Typical batch range, with recurring supply potential
Who we support
Enclosure fabrication for North American OEM equipment
From compact electrical boxes to large machine housings and structural assemblies, we support high-mix, low-to-medium-volume builds.
Industrial equipment
Machinery, automation systems, and operator consoles.
Energy and electrification
Battery energy storage systems, inverters, and EV charging equipment.
Power infrastructure
Switchboards, electrical cabinets, and power equipment.
Outdoor systems
Telecom, utility, and field automation enclosures.
Coordinate before production
Define certification-sensitive details in the drawing package
Material, thickness, openings, joints, hardware, bonding provisions, and finish should be set against the applicable product standard and certification-body review. We use your approved drawings, specifications, and compliance requirements as the production basis. There is no universal sheet thickness that guarantees UL compliance.
Material and sheet thickness
Specify material grade, gauge or metric thickness, finish, and any restrictions. We review the requirements for drawing fit and production feasibility rather than prescribe a one-size-fits-all compliance thickness.
Grounding and resistance criteria
Identify grounding locations, specified hardware, surface preparation, test method, resistance limits, sampling plan, and reporting format. We can fabricate defined provisions and confirm separately whether requested testing and records fit the agreed scope.
Insulation and flammability evidence
Identify exact insulating materials, gaskets, barriers, required ratings, and existing certificates or test reports. We do not claim to perform flame testing or issue flammability reports without a separately agreed, qualified testing arrangement.
What our documentation can cover
Depending on agreed scope and records available, documentation may include material and process traceability, inspection results, and production details relevant to your drawing package. Any ground-resistance or insulation/flammability report must be specified and confirmed before order placement.
In-house capabilities
Controlled, repeatable production under one roof
Keeping core processes in-house supports continuity and coordination as parts move through fabrication. We review large-format work against the design and process requirements.
Our range covers compact electrical enclosures and assemblies up to approximately 4–6 meters, subject to design review.
Fiber laser cutting
Three machines, including 12 kW and 6 kW systems.
CNC press-brake forming
Five machines across multiple tonnage capacities.
Hardware insertion and tapping
Automated clinching, servo tapping, and drilling-tapping equipment for specified hardware and threaded features.
Welding and assembly
MIG, TIG, handheld laser, and cold-welding equipment, with large assembly and fixture tables.
Finishing and powder coating
Brushing and deburring, plus an in-house 2500 × 6000 mm powder coating line for oversized parts and frames.
Engineering and quality
Resolve manufacturability questions early
Our organization includes five mechanical and manufacturing engineers and six QA/QC specialists. Engineering review can address bend allowances, assembly clearances, hardware placement, and weld-related dimensional risks before production.
Quality controls extend from incoming material checks through in-process inspection and first-article review to pre-shipment inspection. Share project inspection points and record needs before quoting so the appropriate control plan and deliverables can be confirmed.
Fabrication partner, not certification body
Enclosuremfg does not claim enclosures are UL Listed, UL Recognized, or ETL Listed, and cannot certify completed equipment or guarantee a certification outcome. Acceptance depends on the complete product, applicable standards, construction details, test results, and the certification body’s evaluation.
If a UL-recognized component, listed material, or approved construction is required, identify it in the drawings or compliance requirements. This helps us confirm what can be manufactured and documented and support a more efficient handoff for your UL or ETL project.
RFQ checklist
Help us review your project accurately
Send the information available and flag any required electrical, grounding, or flammability test criteria for separate scope review.
Discuss your RFQ- 01. 2D drawings and 3D CAD files, if available.
- 02. Material grade, thickness, finish, and coating requirements.
- 03. Quantities, forecast, and target delivery schedule.
- 04. Hardware, grounding, bonding, and insulation specifications.
- 05. Applicable standard, certification body, or project-specific construction requirements.
- 06. Required inspection records, material documents, or test reports.
- 07. Packaging, labeling, and destination details.
Request a quotation
Share your drawings and certification-related requirements
Our engineering and quality teams can review fabrication scope, raise questions, and provide feasibility feedback and a quotation. Include your target UL or ETL pathway and project schedule so the review can focus on your equipment requirements.
For project correspondence or visits: Building 4, Kuiqing Road, Qingxi Town, Dongguan City, Guangdong Province
info@enclosuremfg.com