UL Listed Wiring Devices Manufacturer
ShengYu manufactures GFCI receptacles, USB outlets, switches, and related wiring devices for North American distributors, contractors, and project buyers.
Trust Signals for Buyers
Company at a Glance
Key operating facts for distributors, contractors, and import buyers evaluating ShengYu as a factory-direct wiring devices supply partner.
Founded
2006
North America-focused wiring device manufacturing
Certification
UL & cUL
Primary Markets
United States, Canada
Distributor, contractor, and OEM supply
Factory Location
Zhejiang, China
Direct factory support for export orders
Factory Area
20,000 m²
Assembly, inspection, and packaging support
Production Lines
12
Automated lines for stable project supply
Monthly Capacity
500,000+
Units across core product families
Export Since
2006
Serving North American B2B buyers
About ShengYu
ShengYu Manufacturing is a wiring devices manufacturer focused on the North American B2B market. We supply commercial and residential electrical wiring devices, including UL and cUL listed GFCI receptacles, USB outlets, Duplex receptacles, decorator switches and wall plates for distributors, contractors, builders, and project buyers.
Our product development and manufacturing direction are built around electrical safety, practical specifications, and long-term market relevance. By concentrating on wiring devices for North America, we are able to support customers with a more focused product range and a clearer understanding of application needs across residential, hospitality, commercial, and retrofit projects.
From raw material selection to automated assembly and final inspection, ShengYu maintains close control over the production process to support product consistency and dependable supply. More than a direct factory, we aim to be a reliable manufacturing partner for customers seeking UL listed wiring devices manufacturer support, stable quality, and long-term B2B cooperation. For a closer look at our production and inspection workflow, see Inside Our UL Certified Manufacturing Facility.
ShengYu Manufacturing is a wiring devices manufacturer focused on the North American B2B market. We supply UL and cUL listed GFCI outlets, USB outlets, receptacles, switches, and plates for distributors, contractors, builders, and project buyers.
From raw material selection to automated assembly and final inspection, ShengYu maintains close control over the production process — supporting product consistency and dependable supply for long-term B2B cooperation.For a closer look at our production and inspection workflow, see Inside Our UL Certified Manufacturing Facility.
OEM & ODM Wiring Device Solutions
Supported by an experienced development team and automated production capabilities, ShengYu provides OEM and ODM wiring device solutions for customers targeting the North American market. Our cooperation model is built for practical product development, category expansion, and long-term supply within the wiring devices segment.
Whether the requirement involves custom product configurations, branding support, packaging adjustments, or private-label programs for receptacles, switches, and USB outlets, our team works closely with customers to align manufacturing with real project and market needs. This helps make product planning, launch preparation, and supply coordination more efficient.
With in-house process control, production support, and a stable manufacturing system, we are positioned to support both standard supply and customer-specific programs. ShengYu works with distributors, contractors, importers, and brand owners looking for OEM and ODM wiring devices manufacturer support, reliable production, and scalable cooperation for North American electrical projects. For OEM markings, private-label packaging, sample review, or project-specific wiring device requests, contact ShengYu for OEM/ODM support.
ShengYu provides OEM and ODM wiring device solutions for customers targeting the North American market. Our cooperation model is built for practical product development, category expansion, and long-term supply within the wiring devices segment.
We handle custom product configurations, branding support, packaging adjustments, and private-label programs for receptacles, switches, and USB outlets.
With in-house process control, production support, and a stable manufacturing system, we support both standard supply and customer-specific programs for distributors, contractors, importers, and brand owners.For OEM markings, private-label packaging, sample review, or project-specific wiring device requests, contact ShengYu for OEM/ODM support.
Manufacturing and Production Support
A short look inside our Zhejiang factory — injection molding, PCB assembly, device calibration, and UL-required testing all handled on-site. The video below walks through the main production stages behind our GFCI, USB outlet, and receptacle lines.
Production Support
Injection molding with in-house and customer tooling, PCB assembly, device calibration, and process coordination for standard and OEM orders.
Inspection & Testing
UL 943, UL 498, and UL 20 related electrical testing, in-process QC checks, and final inspection before every shipment.
Scalable Output
25–35 day standard lead time and 500,000+ monthly units across core SKUs for North American distributor and project supply.
Packaging Support
Retail and bulk packaging workflows, OEM private-label integration, UPC barcode printing, and shipment-ready documentation.
Who We Serve
ShengYu works with distributors, contractors, importers, builders, brand owners, and project buyers looking for wiring devices suited to the North American market.
Distributors
UL-listed GFCI, USB outlets, receptacles, switches, and wall plates for distributor warehouse inventory. Mixed-SKU containers and private-label programs.
Contractors & Builders
UL-listed GFCI and TR/WR receptacles for residential, hospitality, commercial, and retrofit projects. AHJ inspection-ready with full documentation support.
Importers & Brand Owners
OEM and ODM wiring devices with private-label programs — face marking, 7-color matching, custom packaging, and UPC barcode integration for North America.
Project Buyers
Cross-category supply of UL-listed GFCI, USB outlets, receptacles, switches, and wall plates from one factory. Submittal sheets and UL docs included.
Quality Control & UL Certifications
All ShengYu GFCI receptacles, duplex receptacles, switches, and USB wall outlets are UL and cUL listed, with certification scope verifiable on UL Product iQ.
VERIFICATION & PROCESS
Frequently Asked Questions
Practical answers on UL verification, in-house manufacturing, shipment documentation, and third-party audits.
How can I verify ShengYu's UL certification independently?
UL & cUL is publicly verifiable on UL Product iQ at iq.ulprospector.com — the official UL certification directory. Enter the file number to view the active certification, product scope, and covered standards (UL 943, UL 498, UL 20). We also provide UL certificates and test reports at shipment for every order.
What manufacturing capabilities does ShengYu handle in-house?
Our facility supports injection molding, PCB assembly, device assembly, UL-required electrical testing, and final QC and packaging for core wiring device lines.
What documentation does ShengYu provide with each shipment?
Every shipment includes the UL certificate, UL test report, commercial invoice, packing list, certificate of origin, and product submittal sheets. For private-label orders we also include OEM-specific documentation covering face markings, packaging design, and UPC barcode assignments for customs and retail compliance.
Can ShengYu support factory audits and third-party inspections?
Yes. We accommodate on-site audits by customer quality teams and third-party inspection companies including SGS, BV, and Intertek. Pre-shipment inspections, in-process QC audits, and social compliance audits can all be scheduled through the sales team. Audit reports and corrective action responses are returned in standard B2B timeframes.
Author & Technical Review
Technical Content Reviewed by the ShengYu Engineering Team
The ShengYu Engineering Team is responsible for technical content on this site, covering UL/cUL-listed wiring devices for the North American market, including GFCI receptacles, USB receptacles, standard receptacles, switches, and wallplates. The team writes from product engineering, factory documentation, quality-control, and submittal-review experience rather than secondary research alone.
How We Write Technical Guides
We do not present ourselves as a field service contractor. Installation and inspection decisions belong to qualified electricians and the AHJ.
The technical review group includes five product and engineering staff members. One has worked with wiring-device products since 2009, one since 2011, one since 2014, and two since 2019. Their work focuses on solving technical product questions, developing new wiring-device models, preparing technical documentation, and reviewing product specifications for North American projects.
Our role is to explain how wiring devices are specified, marked, documented, tested, packaged, and reviewed before they reach North American projects.
Editorial Review Process
Articles involving NEC code changes, UL standards, certification scope, amperage, voltage, trip thresholds, or installation-related product requirements are checked against primary or standards-level sources before publication. These sources may include NFPA, UL Solutions, UL Standards & Engagement, IAEI, CSA Group, CPSC, OSHA, and manufacturer installation documentation when relevant.
Articles are updated when the underlying standard, code edition, certification scope, or product documentation changes. The visible “Last updated” date on each article reflects the most recent substantive review.
Read technical guides on GFCI selection, USB receptacle applications, UL/cUL documentation, and NEC-related sourcing issues.
