Ausgrid + Endeavour + Trench to switchboard
Underground power? Connected.
New connections, conversions and upgrades: consumer mains in conduit from the network point of supply to your switchboard. We trench it, lay it, connect it and put the ground back.
What an underground supply is
An underground electricity supply is consumer mains installed in underground conduit, running from the network point of supply (a street pillar, pit or the base of a power pole) to the property's switchboard.
That whole run is the service side of your connection, and we handle it end to end:
- Trench and install underground consumer mains in conduit
- Install pits and private pillars where the connection needs one
- New underground connections for homes and commercial sites
- Convert an existing overhead service to underground
- Upgrade existing underground consumer mains
- Reinstate concrete, pavers and turf behind the trench
How your connection goes in
01
Send photos and your property details. We assess the job and give you a fixed quote, with a free site visit if it's needed.
02
We lodge every approval with Ausgrid or Endeavour Energy. You never touch the paperwork.
03
We trench, lay the conduit and consumer mains, and install the pit or private pillar if your connection needs one.
04
We connect at the switchboard, test, and reinstate the surface: concrete, pavers or turf.
One team, one quote, one tidy finish. The digging and the electrical never wait on each other.
Private pillars
Some underground connections need a private pillar: a connection point mounted at ground level on your property where the supply joins your consumer mains.
If yours does, we install it as part of the job and it's in the fixed quote from day one. No surprises halfway through a trench.
Trenching and reinstatement
The trench is part of the job, not your problem. We dig it, lay the conduit, run the consumer mains and put the surface back the way we found it: concrete, pavers or turf.
The crew that does the digging is the crew that does the electrical. One team takes it from the first cut to the tidy finish.
Adding capacity while the trench is open? Pair it with a three phase power upgrade or a switchboard upgrade and we quote it as one job. Overhead connection today? See overhead services.
Common questions
How much does it cost to connect underground power to a house?
It comes down to trench length, the surfaces we dig through (grass reinstates cheaper than concrete or asphalt), the cable size and whether a pit or private pillar needs to be installed. We quote it fixed from your site details and photos. Send them through the contact page.
Can you convert an existing overhead power line to underground?
Yes. We do overhead to underground conversions regularly: install the conduit and any pit or private pillar, run the new consumer mains, and complete the changeover so the overhead span comes down. Send us your address and photos and we will scope it.
Who can install an underground power connection? Do I need a Level 2 electrician?
Yes. Underground service work connects to the network at a street pillar, pit or the base of a power pole, so it is restricted to a Level 2 ASP. Thorntek holds ASP 4869 with both Ausgrid and Endeavour Energy and handles the trenching, conduits, cabling, connection and paperwork end to end. Get in touch and we will run the whole job.
How long does an underground power connection take?
It depends on the trench length, the surfaces involved and the network approvals. We do the trenching and put the ground back as part of the job, and the changeover itself only has your power off for part of the day. We confirm the timeframe and outage window in your fixed quote, so ask us when you send your details through.
What is a private pillar?
A private pillar is the connection box on your property where the underground service joins your consumer mains. It is owned and maintained by you, the property owner, not the network. We install and replace private pillars as part of underground connections. If yours is damaged, send us a photo through the contact page.