Electrical Control Panel Fabrication Services

When you need electrical control panel fabrication that gets the job done right, our team at Streamline Contract Manufacturing brings 90+ years of New England manufacturing experience to your project. We're UL 508A certified engineers who design and build custom control panels from 12VDC to 600VAC systems, handling everything from compact motor controls to complex multi-system integration panels.


We understand that your control panel needs to pass inspection on the first pass and perform reliably for years. Our control panel design process starts by understanding your electrical loads, environmental conditions, and communication requirements, then we build panels that meet NEC Article 409 requirements while maintaining code compliance throughout all US states and Canada including Massachusetts, Connecticut, New Hampshire, Vermont, New York, Rhode Island, Maine, and New Jersey. With a product return rate under 0.5%, we're confident our panels will work as specified when they arrive at your facility.

Technical Specifications


  • Voltage and Current Capabilities

    Our industrial control panel fabrication covers the full range from 12VDC to 600VAC systems with current ratings up to 1200 amperes. Whether you're running single-phase or three-phase applications, we design panels with proper overcurrent protection, ground fault protection, and short circuit coordination that keeps your system safe.


    Panel dimensions range from compact DIN Rail subassemblies to large 72" x 120" systems and larger. We'll help you determine whether wall-mount, floor-mount, or freestanding configuration works best for your space and specify enclosures based on what your operational environment actually demands.

  • NEMA Enclosure Ratings

    Let's talk about the right enclosure for your application:


    • NEMA 1: Indoor general purpose when you need protection against dust and light contact
    • NEMA 4: Outdoor rated for windblown dust, rain, and splashing water
    • NEMA 4X: Corrosion-resistant stainless steel construction for washdown environments
    • NEMA 12: Industrial indoor applications with dust-tight and drip-tight protection against oil and coolant exposure
    • NEMA 13: Indoor oil-tight and dust-tight with provisions for oil seepage

  • Control Platform Integration

    We work with the platforms you already know including the Omron NX Platform, Unitronics combined HMI/PLC, and Wago Controllers. Our electrical control panel design includes proper I/O configuration, network communication setup, and HMI integration.


    Need your panel to talk to existing systems? We implement Ethernet/IP, EtherCat, Modbus TCP/RTU, DeviceNet, and Profibus protocols. When your application requires extended distances or electrical isolation, we'll incorporate network switches, media converters, and fiber optic links that ensure reliable communication.



Master Control Panel Assembly

Ask an Expert

Our engineers can answer technical questions about panel specifications, component selection, and compliance requirements for your application. Let's discuss your specific needs.

Industry-Specific Applications


  • Pharmaceutical and Life Sciences

    Pharmaceutical applications, so we know the requirements. Our panels use 316L stainless steel construction with electropolished finishes. When your process includes electronic record keeping and electronic signatures, we design to FDA 21 CFR Part 11 requirements. We lay out panels with accessible test points and clearly documented circuits because we know you need to validate everything.


    For cleanroom applications, you'll get NEMA 4X rated enclosures with smooth surfaces, minimal crevices, and proper sealing to maintain your ISO classification. We're happy to coordinate with your commissioning team and provide the IQ/OQ documentation that supports your validation protocols.

  • Food and Beverage Processing

    Food-grade panels require special attention. We use 304 or 316 stainless steel with IP69K ratings that can handle high-pressure, high-temperature washdown without deteriorating. Our control panel fabrication follows hygienic design principles including sloped tops, sealed cable entries, and accessible wire troughs that drain properly during cleaning cycles.


    Whether you're integrating CIP (clean-in-place) or SIP (sterilize-in-place) systems, we incorporate the sanitary sensors, process control valves, and flow measurement devices your process requires. Temperature monitoring and HACCP compliance features come standard in our food processing control systems.



  • Chemical and Hazardous Locations

    Working with flammable materials? We follow NEC Articles 500-516 for proper component selection and installation methods. Class I Division 1 and 2 applications get explosion-proof enclosures, purged and pressurized cabinets, or intrinsically safe barrier panels based on your specific area classification.


    If you need emergency shutdown systems that integrate with existing safety instrumented systems, our engineers will design the redundant architecture and select components that meet your required SIL ratings.

Design and Fabrication Process


  • Engineering Phase

    We start by reviewing your electrical load calculations, confirming available fault current, and verifying proper conductor sizing. Before we build anything, our engineers create single-line diagrams, panel layout drawings, and complete ladder logic or function block diagrams. You'll see exactly what you're getting.


    Our CAD drawings show exact component locations, wire routing paths, and terminal designations. We provide these in AutoCAD DWG format and PDF for your review and approval, so there are no surprises when the panel arrives.

  • Component Selection

    We specify UL-listed components from manufacturers we trust including Omron, Sprecher and Schuh, Wago, and Saginaw. Circuit breakers, contactors, and overload relays are sized with proper coordination to ensure selective tripping during fault conditions; if something goes wrong, only the affected circuit trips rather than shutting down your entire operation.


    For critical control circuits, we include redundant power supplies. We also calculate heat dissipation and specify cooling fans or air conditioning when panel loading exceeds what ambient air can handle.

  • Fabrication Standards

    Our control panel build services follow UL 508A standards for industrial control panel fabrication. We maintain proper wire bending radii, secure all conductors with appropriate retention methods, and label every wire with heat-shrink markers that match the wiring diagrams. When you open the panel for maintenance, you'll know exactly what you're looking at.


    We use Wago terminal blocks with proper current ratings and voltage isolation. Everything mounts on DIN rail for easy serviceability, and we include at least 20% spare capacity for those inevitable future additions. Quality control inspections happen at incoming component receipt, during assembly, and at final testing to ensure every panel meets specifications.

  • Testing Protocol

    Every panel undergoes point-to-point continuity testing, megger testing at 500VDC, and functional verification of all circuits before it leaves our facility. We test interlock logic, alarm functions, and communication links to make sure everything works together properly.


    When specified, we perform high-potential testing following NFPA 70B guidelines. You'll receive test certificates documenting insulation resistance, ground continuity, and functional performance.

Documentation Package

We provide comprehensive documentation because we know your maintenance team will need it:

Engineering Drawings

  • Single-line electrical diagrams showing power distribution
  • Panel layout drawings with component locations and dimensions
  • Detailed wiring diagrams with wire numbers and terminal designations
  • PLC I/O assignments and network configuration diagrams
  • HMI screen layouts and navigation structure



Compliance Documentation

  • UL 508A short form and panel label
  • Bill of materials with manufacturer part numbers
  • Component specification sheets and certifications
  • Test certificates for electrical performance
  • As-built drawings reflecting any field modifications


Operational Support

  • Operation and maintenance manuals
  • Troubleshooting guides with common issues and solutions
  • Recommended spare parts list with supplier information
  • PLC program documentation with descriptions of all routines
  • HMI screen prints with operational instructions


Project Delivery and Support


Standard lead time for custom control panel design and fabrication is 4-6 weeks for panels under 50 I/O points, 6-8 weeks for 50-200 I/O points, and 8-12 weeks for systems exceeding 200 points. The design phase typically requires 1-2 weeks depending on complexity. We'll coordinate delivery timing with your project schedule and keep you updated throughout fabrication.


Need help with installation? We provide on-site supervision when specified, including startup assistance, loop checking, and operator training. Our engineers remain available for technical support during commissioning and throughout the operational life of your control system. Because we're based in New England and focused on regional manufacturing, you can reach us when you need us.

Service and Modifications


We support the panels we build. If you need troubleshooting assistance, component replacement, or system upgrades, our engineers can help. We can even reverse-engineer undocumented panels, create as-built drawings, and implement modifications that maintain UL compliance.


We stock common replacement parts for faster response when unplanned repairs are needed. After 90+ years in business, we've learned that long-term customer relationships matter more than one-time transactions, so we'll be here to support your panel for its entire service life.



Request for Quote

Provide your electrical load requirements, environmental conditions, and I/O count for a detailed fabrication quote with specifications and timeline.