Underground Mains Installation and Repairs Perth

Cable Winch set up for a 200 meter complex mains cable installation in regional WA - Myalup

Underground electrical mains are one of the most critical parts of any property's electrical infrastructure. Whether you're building a new home, upgrading an existing power supply, replacing a damaged underground cable or connecting power across a large site, choosing an experienced contractor is essential.

At Jarrah Group, we specialise in underground mains installation, underground mains repairs and consumer mains upgrades throughout Perth and regional Western Australia. Our team combines electrical expertise with in-house civil capabilities, allowing us to deliver complete underground power solutions from excavation through to final connection.

From residential properties and commercial developments to rural infrastructure and large-scale electrical projects, we have the experience, equipment and capability to complete projects of all sizes.

What Are Underground Mains?

Underground mains, often referred to as consumer mains, are the cables that supply power from the network connection point or meter position to your property's main switchboard.

Over time, these cables can become damaged, deteriorate, fail compliance requirements or simply become undersized for modern electrical demands.

Common reasons for underground mains replacement include:

• Property renovations

• Switchboard upgrades

• Single phase to three phase upgrades

• Damaged underground cables

• Western Power defects

• New home construction

• Rural property developments

• Increased electrical demand

• Underground power conversions

A properly designed and installed underground mains system is critical for both safety and reliability.

Trailer mounted cable rollers mitigating risks asscociated with freestanding roller - Preston Beach

Underground Mains Installation Perth

Jarrah Group provides complete underground mains installation services for residential, commercial and industrial projects.

Our services include:

• Consumer mains installations

• Underground power connections

• Property power installations

• New home power supplies

• Commercial power infrastructure

• Rural electrical infrastructure

• Site mains installations

• Temporary builder's supplies

• Three phase power installations

We work closely with homeowners, builders, developers, businesses and network providers to ensure installations are completed safely and efficiently.

Consumer Mains Upgrades

As electrical demand continues to increase, many properties require larger consumer mains to support additional loads.

Common upgrade projects include:

• EV charger installations

• Air conditioning upgrades

• Workshop power supplies

• New commercial equipment

• Three phase power upgrades

• Property subdivisions

• Additional buildings and structures

Our team can assess your existing infrastructure and recommend the most suitable upgrade solution.

In-House Civil and Electrical Capability

One of the key advantages of working with Jarrah Group is our ability to complete both the electrical and civil aspects of a project.

Unlike many electrical contractors who rely entirely on external subcontractors, we operate our own civil equipment and machinery.

This allows us to provide:

• Trenching and excavation

• Conduit installation

• Pit and pipe installations

• Cable hauling

• Cable jointing coordination

• Reinstatement works

• Electrical installation and testing

By managing the entire project in-house, we improve efficiency, reduce delays and maintain quality control from start to finish.

Underground cable systems being installed in the Wheatbelt - Northam WA

Metro and Regional Western Australia

Our team regularly delivers underground mains projects throughout:

Perth Metropolitan Area

• Perth CBD

• Eastern Suburbs

• Perth Hills

• Northern Suburbs

• Southern Suburbs

• Coastal developments

• Commercial and industrial estates

Regional Western Australia

• Wheatbelt

• Goldfields

• Mid West

• South West

• Pilbara

• Agricultural properties

• Regional commercial facilities

Whether your project is located in suburban Perth or a remote regional location, Jarrah Group has the capability to deliver professional underground power solutions.

Why Choose Jarrah Group?

When it comes to underground mains installation and repairs, experience matters.

Jarrah Group offers:

• Licensed and insured electricians

• In-house excavation equipment

• Electrical and civil capabilities

• Consumer mains specialists

• Large cable pulling experience

• Metro and regional coverage

• Commercial and residential expertise

• Western Power compliance experience

• End-to-end project delivery

We pride ourselves on providing practical, reliable and cost-effective solutions for even the most complex underground power projects.

Trailer Cable winch set up for a pull - Myalup WA