Every low-voltage contractor inherits other people’s mistakes. We get the call after the fact: Wi-Fi that drops mid-meeting, a camera that won’t hold PoE, a patch panel that looks like a bird’s nest. Almost always the root cause is a bad cable job — runs pulled fast, terminated sloppy, and never tested. The install looked fine on day one. The real cost shows up six months later, and the customer ends up paying for it twice.
Where Bad Cable Jobs Actually Fail
The failure modes are boring and predictable. Untested runs that pass a link light but never hit gigabit. Cat6 kinked past its bend radius during the pull, so it quietly negotiates down to 100 Mbps and nobody notices until a 4K camera starts dropping frames. Terminations done by feel instead of to spec. No labeling, so the next tech — usually us — burns two billable hours tracing what should have taken ten minutes. We pulled a job in Fremont last spring where eight “working” drops turned out to share two actual functioning runs behind the drywall. The customer had paid for eight.
What the Redo Actually Costs
Here’s the math people miss. The cheap install saves a few hundred dollars up front. The redo costs more than doing it right the first time would have — you pay to diagnose the bad work, open walls a second time, re-pull, re-terminate, and re-test, often after a failure has already cost you downtime. In a Hayward office we serviced, one botched run took down a point-of-sale system during business hours. The cabling was the cheapest line item in the building and the most expensive failure that week. A documented, labeled, tested install isn’t a premium — it’s the version that doesn’t generate a second invoice.
A bad cable job is invisible until it isn’t. If you’re comparing quotes, ask what gets tested, what gets labeled, and what documentation you get at handoff — that’s the line between a price and a liability. We’re C-7 licensed (#1141654), and every run we pull is labeled, tested, and documented. See how we approach structured cabling.
