Electrical Testing & Maintenance Services in Black Hawk, SD | Since 1980

5401 Circle St, Black Hawk, SD 57718

(605) 787-4688

http://etmi.com/

Company Background

Electro-Test & Maintenance has been a trusted name in electrical reliability since 1980, operating from its authorized service center in Black Hawk, South Dakota. Specializing in high-voltage electrical testing and maintenance, our team serves not only the western U.S. but also supports critical infrastructure across the nation. We provide comprehensive services, including recloser and circuit breaker testing, voltage regulator maintenance, power quality analysis, infrared inspections, and full substation testing and commissioning. Our Black Hawk facility is equipped with the specialized tools and expertise to ensure electrical systems operate safely and efficiently, helping to prevent outages and extend equipment lifespan for utilities, industrial clients, and commercial facilities.

Common Questions

What does a comprehensive electrical inspection from your Black Hawk facility involve?

Our electrical inspection is a thorough diagnostic process. For residential concerns in Black Hawk, like flickering lights, we start with a detailed power quality analysis to identify voltage irregularities. We also use infrared thermography to detect hidden hotspots in wiring or panels that could indicate a fire risk. For commercial or utility equipment, our inspections include testing circuit breakers, reclosers, and regulators to ensure they will operate correctly under load. It's a proactive approach to find and fix issues before they cause a failure.

As a homeowner in Black Hawk, who should I call for persistent arc fault breaker trips or flickering lights?

While a standard electrician can replace a faulty breaker, our expertise is in diagnosing the root cause. Persistent arc fault trips or flickering lights often point to deeper issues like poor wiring connections, overloaded circuits, or problems originating from the utility side. We use power quality analyzers and infrared inspections from our Black Hawk center to pinpoint the exact source—whether it's in your home's wiring, a specific appliance, or the incoming service. This diagnostic service helps ensure a lasting fix, not just a temporary reset.

Your summary mentions servicing the western U.S. Do you handle local jobs in the Black Hawk area?

Absolutely. While our high-voltage testing services for utilities and industry have a broad geographic reach, our facility in Black Hawk is our home base. We are fully equipped and staffed to handle local electrical testing and maintenance needs. This includes power quality analysis for local businesses experiencing equipment issues, infrared inspections for area manufacturing plants to prevent downtime, and supporting local contractors with specialized diagnostic services they may not offer. Serving our local community is a priority.

Core Services

  • Electric inspection

Business Location & Hours



Mon:Open 24 hours
Tue:Open 24 hours
Wed:Open 24 hours
Thu:Open 24 hours
Fri:Open 24 hours
Sat:Open 24 hours
Sun:Open 24 hours


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