Cable & Sheath Fault Locating in Nanaimo, BC

EM line tracing is largely soil-independent — it follows the signal on the conductor regardless of what's around it — but GPR, the half that finds non-conductive plastic and clay lines, is very soil-sensitive. Nanaimo sits on predominantly till and sandstone benches — with documented historic coal workings beneath parts of the city. Standard till performance at surface, but Nanaimo's defining subsurface feature is its coal-mine legacy: old workings and shafts underlie several neighbourhoods, making void detection a local specialty. So in Nanaimo we lean on EM for the metal and tracer-wired lines and set realistic GPR expectations for the plastic — which is exactly why running both methods matters here.

The local mix follows the building stock: Harbour-city mix of heritage districts, mid-century suburbs, and rapid hospital-area densification. Underneath that, the everyday Nanaimo locate is private water and irrigation services, power to outbuildings and gates, gas to outdoor features, and the plastic mains that need GPR or sonde tracing — the private-side utilities no public locate covers.

Yes. BC One Call marks member utilities' public lines to the property line across Nanaimo and all of BC — it does not locate the private services beyond it, which is where most strikes happen. The EM + GPR clearance survey covers those private lines. Use both: BC One Call for the public locates, a private dual-method locate for everything on your side.

Province-wide pricing — no regional premium for Nanaimo or anywhere in the Vancouver Island. A focused clearance (a dig area, a fence line) starts in the low-to-mid hundreds; full-site mapping and SUE-grade work are quoted by scope. The free phone consult (604-239-9934) gives a firm number in about five minutes. Mon–Sat, 8am–6pm PT.

Yes — that's the entire point of fault locating. Continuity testing tells you a fault exists; EM fault-finding tells you where. By tracing the applied signal and watching how it fades at a break or diverts to ground at a sheath fault, the location narrows to a small marked area. The repair crew digs one hole at the fault instead of trenching the whole run hunting for it.

A sheath (or insulation) fault is where a cable's protective covering is damaged and current leaks to the surrounding ground rather than staying on the conductor. It's tricky because the line may still partly work, so simple continuity checks miss it — it takes ground-return fault-finding techniques that follow where the signal escapes to earth. Those are exactly the methods this service uses.