In my role coordinating cable supply for a regional electrical distributor, I've handled 45+ "this cable is bad" calls over the past three years. Everything from a dead feed on a chicken farm in East Texas to a Cat6a pull that tested fine at the rack but dead at the wall plate.
Here's a number that surprises most people: about a third of those calls turned out to be a connection problem, not a cable problem. Another third was a spec mismatch—the cable was fine, but the wrong product for the installation. Only the final third was an actual cable failure.
People think when a circuit doesn't work, the cable must be bad. Actually, the causation usually runs the other way: cable is the most tested, most inspected component on a job site. Terminations, polarity mix-ups, and wrong specifications cause far more field failures than defective copper ever does.
So before you rip that General Cable out of the conduit—stop for two minutes and figure out which of these three scenarios you're in.
Scenario 1: The Cable Is Still on the Spool, and You're Second-Guessing the Spec
Maybe the jacket printing looks different than what you're used to. The order number doesn't match your notes. Or someone handed you a reel that's supposed to be Cat6a, but the brand mark doesn't line up with the purchase order. Whatever triggered the doubt, you need to reconfirm the specification before you pull a few hundred feet of cable.
Start with the General Cable spec sheets. Every major product line has one—THHN/THWN building wire, SOOW portable cord, Cat6/Cat6a data cable, control cable, the whole catalog. The spec sheet tells you conductor size, insulation thickness, voltage rating, temperature rating, and the applicable UL/CSA standards. These documents are publicly available, so there's no reason to guess.
In my first year, I made the classic specification error: I assumed "spec" meant the same thing to every manufacturer. An electrician asked for THHN, the warehouse pulled THW, and I told the project manager they were interchangeable. They're not. That misunderstanding cost me a $600 redo and a lot of trust with a client I still work with today.
Here's what to compare between the jacket print and the spec sheet:
- UL/CSA listing—THHN/THWN references UL 83; Cat6a should reference TIA-568-C.2.
- Gauge and conductor count—12 AWG, 10 AWG, 3-conductor, whatever the drawing calls for.
- Voltage rating—600V for most building wire; 300V for some portable cord.
- Temperature rating—90°C for THHN, 75°C for THW—this matters more than people think.
- Date code—so the cable can be traced to a production batch if there's ever a question.
If the jacket print matches the spec sheet, the cable is almost certainly fine. And if you need the spec sheet in a hurry, don't just email and wait. Email works in normal times—or rather, email works when you have two days of lead time. When you're standing on a job site with a crew looking at you, a phone call is faster. Always.
Scenario 2: The Cable Is Installed, and You're Seeing Zero Voltage
You've pulled the wire, terminated both ends, and the equipment won't power up. Before you blame General Cable, let me show you what a multimeter can tell you in about two minutes.
Here's how to use a multimeter to test voltage—the practical job-site version, not the owner's manual version:
- Set the dial to AC voltage (V~) or DC voltage. Match the setting to the circuit you expect: AC for building power, DC for batteries, control circuits, and phone lines.
- Plug the black probe into the COM port and the red probe into the V port.
- Touch the black probe to neutral (or ground) and the red probe to the hot conductor.
- Read the display. That's literally the whole test—two probes, one reading, a lot of information.
On a 120V circuit, you should see something in the 117–125 volt range. A 240V circuit reads between 208 and 240 volts. If you're reading zero, you have an open somewhere—and in my experience, it's usually a push-back in the termination, not a broken copper conductor. Copper doesn't fail quietly; connections do.
Phone lines are a good example of a reading that looks wrong but isn't. An on-hook phone line sits at about 48 volts DC. When a phone goes off-hook, the voltage drops to roughly 7.1 volts DC. I've had technicians panic over that 7.1 reading, convinced the line was dying, when it was actually the phone pulling the circuit down exactly as designed. If you don't know what normal looks like on the application you're testing, you can misread a healthy system as a broken one.
Last November, a customer called at 4:00 PM saying the feed to a refrigeration unit was dead. His helper had already cut out 20 feet of perfectly good SOOW cable before I talked him into putting the multimeter on the circuit. Ten minutes later, he found a set-screw termination that was barely snug. One quarter-turn fixed a $2,000 problem.
Field note: the two most common causes of "dead cable" I see are terminations that were never snugged down and wires landed on the wrong terminals. Test those before you question the cable.
The assumption is "no voltage equals bad cable." The reality is that no voltage almost always means an open termination, wrong wire sequence, or reversed polarity. The cable is the honest part of the circuit. Put another way: the copper almost never lies—the connections are where the mistakes hide.
Quick safety note: anything above roughly 50 volts can hurt you. If you're not qualified to test live circuits, or the equipment is under lockout/tagout, follow your safety procedure and get someone who is qualified to take the measurement. A multimeter is a diagnostic tool, not a magic wand.
One more caveat: a multimeter checks voltage and continuity, but it won't tell you whether a cable passes a high-voltage hipot test or whether a data link certifies to Cat6a specifications. Those require purpose-built test equipment. For a quick field check, though, voltage testing gives you 80% of the answer in two minutes.
Scenario 3: The Cable Is Actually Bad—and You Need It Now
Okay, so you've verified. The spec sheet matches, the terminations are clean, and the conductor still tests open. Time to stop troubleshooting and start replacing.
The fastest path is a phone call to your distributor. If they don't stock the exact product, the next move is contacting the General Cable Scottsville TX location. I've called that facility for emergency replacement copper and portable cord, and the team there can pull stock availability and email the spec sheets while you're still on the line. That's the kind of support that saves a schedule.
General Cable has been part of the Prysmian Group since 2018, which means the Scottsville TX plant operates inside a much larger global supply network. When local stock is tight, that broader footprint becomes an advantage.
And here's something I feel strongly about: small orders deserve the same treatment as large ones. When I was starting in supply, the vendors who took my $200 orders seriously are the ones I still place five-figure orders with today. Small doesn't mean unimportant—it means potential. A supplier who ignores small requests shouldn't expect the big ones later.
When you call, have these ready:
- The part number printed on the jacket—this is 80% of the conversation.
- Gauge, conductor count, and jacket type.
- The length you need, or at least the pull length.
- The real deadline. Don't say "ASAP" if you actually need it by tomorrow at 3:00 PM. Specifics get results.
Having the General Cable spec sheet printed out makes that call about ten minutes faster. The conversation goes from "let me look it up" to "yes, we can cut you 350 feet off the drum."
How to Tell Which Scenario You're In
The decision tree is simple, and it will save you from cutting out good cable or chasing a problem that doesn't exist:
- Cable still on the spool, worried about compliance? Scenario 1. Pull the spec sheet and match the jacket print before you install anything.
- Cable installed and dead? Scenario 2. Test voltage at the source and at the load with a multimeter before you cut anything. I've watched crews remove good cable because they were moving too fast to check the obvious.
- Both checks point to a real failure? Scenario 3. Call Scottsville TX before you tear anything else out.
And if you're genuinely not sure where to start? Start with the spec sheet. It's the cheapest tool you'll ever carry on a job site—and the one that gets ignored the most. Good luck out there.
