About Coalwood Electric I Limited Partnership · Houston
Coalwood Electric I Limited Partnership is a Houston, Texas-based custom control panel manufacturer and electrical integrator that has been building industrial control systems since 1980. The firm is certified as a NNNY/7 shop, meaning it is qualified to build control panels for hazardous (classified) locations including explosion-proof, purged and pressurized, and nonincendive enclosures. Coalwood designs, drafts, builds, tests, and installs control systems for clients across the oil-and-gas, chemical, and process industries, with a specialty in wiring complete skid packages from the panel to the end devices.
Founded in 1980, Coalwood Electric I Limited Partnership operates out of southeast Houston and has spent more than four decades specializing in one thing: building custom electrical control panels. The company is run by Michael Sean Wood and serves industrial customers who need reliable motor controls and hazardous-location enclosures. Coalwood holds NNNY/7 shop qualification, allowing it to fabricate panels rated for Class I, Division 1 and Division 2 areas under UL 1203 (explosion proof), NFPA 496 (purged and pressurized), and ANSI/ISA 12.12.01 (nonincendive) standards, in NEMA 1, 3, 3R, 4, 4X (304 or 316 stainless), 7, 12, and 13 enclosures. Beyond enclosures, the company builds the full range of motor starting and process control systems — simple start/stop stations for single, dual, and multiple starters, Y-Delta starters, soft starters, variable frequency drives (VFDs), and PLC-based control systems. A signature offering is full skid-package wiring: Coalwood will design the panel, supply AutoCAD drawings for approval, build and test the panel, then install and wire it to the customer's equipment and assist with startup on request. The firm also troubleshoots and services electrical components on existing equipment. Customers can request a quote for just the panel build (shipped loose) or for a fully wired skid.
- In business
- Since 1980 (over 40 years)
- Owner
- Michael Sean Wood (contact listed on official site)
- Serves
- Houston, Texas and surrounding industrial clients (shipped and installed across the U.S. as quoted)
About Coalwood Electric I Limited Partnership
Coalwood Electric I Limited Partnership is a Houston-based manufacturer of custom industrial control panels that has been in continuous operation since 1980. The company designs, builds, and wires control systems for industrial customers, with particular depth in hazardous-location enclosures and skid-mounted equipment. Led by Michael Sean Wood, Coalwood positions itself as a single source that can take a customer's electrical control requirements from concept through on-site startup.
- Operating since 1980
- Based in Houston, Texas
- Run by Michael Sean Wood
- NNNY/7 qualified shop for hazardous locations
Custom Control Panel Manufacturing
The core of Coalwood's business is building custom control panels tailored to a customer's specifications. Coalwood's standard process begins by reviewing the customer's control requirements, producing AutoCAD drawings for approval, fabricating the approved panel, completing and testing the control system before shipment, installing and wiring the panel to the customer's equipment, and assisting with startup on request.
- Design review of customer control requirements
- AutoCAD drawings supplied for approval
- Panel build, completion, and pre-shipment testing
- Installation and wiring to customer equipment
- Startup assistance on request
NEMA Enclosure Capabilities
Coalwood supplies control panels across the full range of common NEMA enclosure types, allowing the same shop to serve indoor, outdoor, washdown, and hazardous-location environments. Stainless options are available for corrosive settings.
- NEMA 1 (indoor)
- NEMA 3 and 3R (outdoor)
- NEMA 4 (watertight)
- NEMA 4X in 304 or 316 stainless steel
- NEMA 7 (hazardous locations)
- NEMA 12 and 13 (dust/oil-tight indoor)
Hazardous-Location (NNNY/7) Shop
Coalwood is qualified as a NNNY/7 shop, meaning it is authorized to build control panels intended for use in hazardous (classified) locations. This certification covers three families of protection methods commonly required in oil-and-gas, petrochemical, and chemical-process facilities.
- Explosion Proof Panels — Class I, Division 1 & 2 under UL 1203
- Purged and Pressurized Panels — Class I and II under NFPA 496
- Nonincendive Panels — Class I, Division 2 under ANSI/ISA 12.12.01
Motor Control and PLC Systems
Beyond the enclosure, Coalwood builds the actual control logic — from the simplest motor starting circuits to programmable logic controller systems. Customers can specify the level of control sophistication they need.
- Simple Start/Stop control systems for single, dual, and multiple starter panels
- Y-Delta starter panels
- Soft Start starter panels
- Variable Frequency Drive (VFD) control systems
- PLC-based control systems
Skid Package Wiring
A signature service is full electrical integration of customer skid packages. Rather than ship a loose panel, Coalwood can quote the complete package: design, build, install, and wire the control panel to the end devices on the skid so that the assembly arrives at the customer ready to commission.
- Design and build of the skid control panel
- Wiring from the control panel to end devices
- Quoted as a complete system or as panel-only
Service and Troubleshooting
In addition to new builds, Coalwood services the electrical components on existing equipment and troubleshoots problems on customer control panels. Customers can engage the company either for a full system build or for repair and diagnostic work.
- Service on electrical components of existing equipment
- Troubleshooting on customer control panels
- Repair and diagnostic support
Contact and Location
Coalwood Electric I Limited Partnership is based in southeast Houston. The mailing address is on Hogue Street, with an additional location on Rupley Circle. Quotes and inquiries are handled by phone, fax, and email, with a dedicated quotes email address.
- 5727 Hogue Street, Houston, TX 77087
- 6610 Rupley Circle, Houston, TX 77087
- Phone: 713-683-9991
- Fax: 713-683-0022
- Email: coalwoodquotes@sbcglobal.net
- Contact: Michael Sean Wood