Underground Cable Locating Sydney
Locate live and buried cables before excavation or trenching begins
Underground cable locating protects workers, assets, and timelines. In Sydney, it is a regulatory requirement under SafeWork NSW guidelines to verify the location of underground services before excavation begins. Plans from Before You Dig Australia (BYDA) are not enough, they provide approximate data only. Certified on-site cable locating ensures accuracy, compliance, and safety for residential, commercial, and infrastructure projects.
At Locate & Map, we detect electrical, fibre, NBN, communications, street lighting, and data cables using electromagnetic locators (EML) and ground-penetrating radar (GPR). Every locate includes visible ground markings, depth estimation, photo documentation, and optional mapping reports with AS 5488 quality level classification.
What’s included in underground cable locating?
Certified Cable Detection
Our CertLoc-accredited technicians locate metallic and non-metallic cables, including power, fibre, NBN, and data. All work is carried out in accordance with safety protocols and AS 5488 requirements.
EM & GPR Technology
We use electromagnetic locating for live and metallic lines, and GPR scanning for fibre optics, PVC, and buried non-conductive assets. Both technologies are applied depending on service type and ground conditions.
On-Site Markings
Located services are clearly marked on the ground using paint, pegs, or chalk. Markings show the type of utility, alignment, and depth indicators to guide safe excavation and project planning.
Depth Estimates
Technicians provide estimated depth readings for each detected cable. Estimates are based on calibrated equipment data and verified by conditions on-site, helping clients reduce strike risks.
Utility Mapping
Optional deliverables include CAD or PDF utility maps, annotated photo logs, and AS 5488 Quality Level classification to support compliance, engineering approvals, and excavation documentation.
Why plans alone aren’t enough for cable locating in Sydney
Plans from BYDA show asset owner data, not verified cable locations. They do not reflect undocumented services, recent changes, or precise positions. Without physical locating, you risk cable strikes, project delays, and regulatory breaches. Our team conducts on-ground scans using EM and GPR equipment to confirm and mark service locations in real-time.
Cable locating bridges the gap between planning data and physical reality. Whether you’re trenching for a new electrical run, installing a pool, or managing multi-utility infrastructure, site-verified locates are the only way to ensure compliance and avoid unexpected costs.
Book certified underground cable locating across Sydney today
Same-day and after-hours bookings available across Greater Sydney. All locators are CertLoc accredited and operate under AS 5488 protocols. Get Instant Quote
Which Sydney projects need cable locating before work begins?
Underground cable locating is required on all sites where excavation, coring, or trenching is planned. This includes small residential works and large civil infrastructure. Locate & Map supports projects across Sydney, including new builds, roadworks, pool installations, fencing, landscaping, and service upgrades. We help prevent costly damage to power, data, and fibre networks with certified detection and clear reporting that meets legal and safety standards.
When should you use GPR vs electromagnetic locating?
Electromagnetic locating works best for conductive, metallic services like live power and copper communications lines. For non-metallic assets such as fibre optics, NBN conduits, and PVC water pipes, GPR is used to detect reflected radar signals in the subsurface. GPR also supports the identification of voids, concrete thickness, and congested service areas. Our technicians assess site conditions, such as soil type and interference, to apply the right method or combination for accurate results.
What happens after we locate your underground cables?
After on-site locating, all services are marked, photographed, and logged. If required, we deliver a utility map in CAD or PDF format, including depth indicators and an AS 5488 quality level (QL-B for geophysical locating, QL-A for exposed services). Our reports support construction approvals, engineering documentation, and clash detection. In cases where exposure is required for QL-A, we refer or coordinate vacuum excavation (non-destructive digging) to ensure full compliance.