Built to Spec.
Shipped on Time.
A 65,000 square foot manufacturing facility on 15 acres, purpose-built for transformer components that meet the demands of the modern electrical grid.
- 1971
- Year Founded
- 65,000 ft²
- Facility Size
- 15 acres
- Site Footprint
- 2 weeks
- Catalog Lead Time
Marthasville, Missouri.
End-to-End U.S. Manufacturing.
Warco's Marthasville facility houses the full manufacturing operation — from raw material receiving through finished component inspection and shipment. Our production floor is organized around process flow efficiency, with dedicated areas for porcelain forming, metal fabrication, assembly, electrical testing, and order fulfillment.
Every item ships from this single location. No offshore manufacturing. No third-party assembly. When you order from Warco, you get a component made by Warco technicians under Warco quality controls.
Operator accountability.
Systematic quality.
Warco's quality approach is built on a principle of individual accountability supported by systematic process controls. Every operator owns the quality of their work.
Operator Quality Ownership
Each production operator is responsible for the quality of their own work. This accountability model reduces defects at the source rather than relying solely on end-of-line inspection.
Dedicated Quality Team
A dedicated quality assurance team supports production with process audits, incoming material inspection, and outgoing product review before any shipment leaves the facility.
Electrical Testing
Bushings undergo routine electrical testing including dielectric verification appropriate to voltage class. Test procedures follow industry standards to ensure each unit meets specification before shipment.
Incoming Material Inspection
Raw materials and purchased components are inspected on receipt. Porcelain, hardware, and insulating materials are verified against specifications before entering production.
2-Week Catalog Lead Time
Standard catalog items typically ship within two weeks of order. This is maintained through careful inventory management of raw materials and semi-finished components across the product line.
Custom Engineering
Non-catalog items are manufactured to customer specification. Our engineering team works with buyers to define dimensions, voltage ratings, BIL levels, and mounting configurations for custom applications.
Voltage classes in production
| Category | Voltage Class | BIL Range | Items |
|---|---|---|---|
| LV Distribution Bushings | 1.2 – 5 KV | 30 – 60 KV BIL | 10 |
| High Current Bushings | 1.2 – 5 KV | 30 – 60 KV BIL | 14 |
| High Voltage Bushings | 8.7 – 34.5 KV | 95 – 200 KV BIL | 24 |
| Power Class Bushings | 5 – 46 KV | 60 – 250 KV BIL | 33 |
| Recloser Bushings | 15 – 34.5 KV | 110 – 200 KV BIL | 8 |
| Replacement Porcelain | 1.2 – 46 KV | 30 – 250 KV BIL | 35 |
| Tap Changers | – | 50 – 200 KV BIL | 12 |
| Wildlife Protection | ≤ 25 KV | – | 10 |
| Connectors & Accessories | – | – | 45+ |