Buried cable failures shut down operations without warning while the damage hides underground. Trenching across your property hoping to find the break destroys pavement, landscaping, and budget before anyone locates the actual problem. GPR Bros uses TDR diagnostics and electromagnetic pinpointing to measure exactly where conductor damage occurred beneath the surface. We mark one spot on the ground. Your electrician digs one hole. Power comes back.
Precision Cable Testing Services
Current escaping to ground or arcing between conductors produces electrical signatures our equipment reads immediately. GPR Bros connects diagnostic tools at accessible termination points and interprets those signatures to determine what failed and how far down the cable it happened, before anyone picks up a shovel or breaks concrete.
We gather information about your electrical system: service voltage, cable age, failure symptoms, accessible connection points. This assessment determines which combination of TDR and electromagnetic methods will produce accurate results fastest.
Technicians connect diagnostic equipment and send controlled signals through the damaged conductor. Pulse reflections calculate distance to the failure point. Surge-induced electromagnetic bursts mark the physical location. Our receivers triangulate until readings converge precisely.
GPR Bros paints the confirmed failure location directly on the surface and flags the entire cable route. Your electrician receives distance measurements, fault analysis, and documented path. Everything required for targeted excavation.
Accurate - Non-Destructive
Decades of heat cycling weaken cable insulation until it cracks. Moisture migrates through microscopic jacket punctures. Shifting soil stresses splice connections beyond their limits. Previous construction damages conductors that survive for years before finally breaking down. The result: current escaping somewhere you cannot see.
Property owners contact GPR Bros after their electrician confirms the cable failed but cannot determine where. That vague diagnosis triggers proposals for trenching entire runs, replacing hundreds of feet of conductor, destroying finished surfaces across the property. Professional cable testing changes that outcome completely. We measure electrical pulse reflections to calculate distance, then walk the traced route with electromagnetic receivers until signals peak directly over the buried damage. Instead of replacing everything, you repair one splice at one marked location. Instead of trenching from building to transformer, your crew excavates a single targeted pit. The diagnostic investment pays for itself immediately by eliminating unnecessary excavation, wasted cable material, and labor spent digging in the wrong place.
Hospitals, distribution centers, manufacturing plants, retail complexes, and municipal facilities throughout Florida and Georgia trust GPR Bros for underground cable fault locating on everything from 15kV primary feeders to 120V residential drops.
Professional-Grade Diagnostics
Not every cable failure produces clean test readings. Dead shorts create obvious signatures with precise distance measurements. High-resistance ground faults behave differently: damaged insulation allows current to flow until loads increase, then arcs intermittently before resetting. These frustrating failures trip breakers randomly and evade basic diagnostic approaches.
GPR Bros deploys surge generators that stress weakened insulation with controlled high-voltage pulses, forcing breakdown and producing electromagnetic bursts our surface receivers detect. Thumper units add acoustic shockwaves that specialized microphones pick up through soil and pavement.
We combine distance calculations with physical signal tracking until both methods confirm the same location. Intermittent problems that frustrated your maintenance team for months get resolved on one site visit because GPR Bros brings equipment specifically designed for difficult faults and technicians who understand how to interpret the data across varying soil conditions, cable constructions, and installation depths.
Complete Site Assessment
Distance readings mean nothing without a documented path. Knowing the fault sits 412 feet from the transformer could land anywhere if nobody mapped which direction the cable runs or where it turns.
GPR Bros traces your complete cable route before interpreting test results. We energize the conductor with a transmitter signal and follow it across the property using receivers tuned to that frequency, painting the path at regular intervals. This mapping reveals directional changes, splice points, and parallel utilities, then converts TDR distance into a specific spot on the ground where excavation happens.
No guessing. No exploratory trenching. One marked location.
All Voltage Classes Supported
GPR Bros tests everything from 15kV primary feeders serving industrial complexes to 120V underground residential drops. Each voltage class uses different conductor construction with unique diagnostic characteristics. Medium voltage cables contain robust insulation systems that produce distinct pulse signatures. Low voltage runs often share trenches with telecommunications, water, and gas, requiring precise signal discrimination to avoid confusion.
Our technicians adjust equipment settings and interpretation methods based on what’s actually buried at your site, not a generic approach that misses critical details. Whether a failed primary feeder has blacked out your entire operation or a secondary service drop has killed power to one building, GPR Bros delivers the same precision diagnostics.
We identify where the damage occurred so your licensed electrician digs in exactly the right spot and restores power without unnecessary delays.
Contractors across Florida and Georgia trust GPR Bros when project safety and schedules depend on accurate locates.
It was a pleasure working with GPR Bros. They were very reliable, responsive, and always got back to us whenever we needed them. Great company to work with!
Great company with a strong reputation for professionalism and quality work. Reliable, knowledgeable, and easy to deal with. You can tell they take pride in what they do and care about doing things the right way. Highly recommend!
Amazing service, was a pleasure working with you
If your looking for a reliable company with great customer service and quality work! GPR Bros are the way to go!! Highly recommended!
GPR Bros delivered top-tier service! 811 only marks public utilities, so we hired GPR Bros for private locating before excavating. Their tech arrived on time, used advanced GPR equipment, and precisely mapped out all underground utilities on-site. Fast, accurate, and professional—they saved us from costly line damage. Highly recommend!
GPR BROS is the only place I will ever get GPR Scanning from going forward. they took care of us and beyond. And all the scans were very accurate a special thanks to Aaron
GPR Bros locates underground utilities, pipes, and cables before you dig. We serve contractors, homeowners, and property managers across Florida and Georgia with same-day availability when you need it. Call now for a free quote.
TDR sends an electrical pulse through the conductor and measures the reflection when it hits damaged insulation or a broken wire. Return timing converts to distance, telling us exactly how far from the test connection the failure occurred. GPR Bros technicians throughout Florida and Georgia use professional-grade TDR equipment calibrated for accuracy within inches across most underground cable types and installation conditions.
Arc reflection uses surge generators to apply controlled high-voltage pulses that force damaged insulation to momentarily break down. Each breakdown creates an electromagnetic burst detectable from the surface. GPR Bros walks the traced cable path with specialized receivers, tracking signal strength until readings peak directly over the buried failure point.
Most cable fault locations take two to four hours from arrival to painted surface marks. Complex sites with multiple cable runs, limited access points, or intermittent failures may require additional time. GPR Bros provides estimated duration after reviewing your situation so you can coordinate electrician and excavation crews across Florida and Georgia projects.
Most fault locating methods require de-energized and isolated conductors for accurate results and technician safety. GPR Bros coordinates with your electrical team to schedule testing windows that minimize operational disruption while ensuring precise diagnostics and protecting everyone working on site.
GPR Bros locates dead shorts, ground faults, high-resistance failures, intermittent breakdowns, and complete conductor breaks in underground power cables. Our equipment handles direct-buried conductors, cables in conduit, armored installations, and legacy systems throughout Florida and Georgia regardless of age or construction method. If current flow is compromised, we find where.
