Single Phase to Three Phase Power Upgrades
Full end-to-end single to three phase upgrades for homes and businesses across Greater Sydney
Upgrading to Three Phase Power
Single to three phase upgrades involve converting your premises from a single phase supply (230V, one active conductor) to a three phase supply (400V, three active conductors). This requires a Level 2 ASP to apply to Ausgrid or Endeavour Energy for a three phase connection, upgrade the service mains, install a new three phase switchboard and metering, and coordinate energisation with the DNSP. It is one of the most comprehensive electrical upgrades a property can undergo and requires careful coordination between network, metering, and switchboard works.
Demand for three phase power is growing rapidly across Greater Sydney. Large homes in the Hills District and acreage properties in the Hawkesbury and Penrith areas increasingly need three phase for ducted air conditioning systems, workshop equipment, EV chargers, and home batteries. Commercial fitouts in Parramatta, Macquarie Park, and the CBD regularly require three phase for kitchen equipment, lifts, and industrial machinery. We manage the complete upgrade process — from DNSP application to final energisation — as a single contractor.
Single to Three Phase Upgrade Process
Load Assessment & Design
We calculate three phase maximum demand, design the new service configuration, and confirm point of supply with Ausgrid or Endeavour Energy.
DNSP Application
We submit the three phase connection application including service design, load calculations, and proposed works to your network distributor.
Service Mains Upgrade
We install new three phase service mains — overhead or underground — from the network connection point to your premises.
Switchboard & Metering
We install a new three phase switchboard, main switch, and three phase metering coordinated through AEMO as your accredited metering coordinator.
Energisation & Testing
The DNSP energises the three phase supply, all phases are tested and confirmed, and a certificate of compliance is issued.
Load Assessment & Design
We calculate three phase maximum demand, design the new service configuration, and confirm point of supply with Ausgrid or Endeavour Energy.
DNSP Application
We submit the three phase connection application including service design, load calculations, and proposed works to your network distributor.
Service Mains Upgrade
We install new three phase service mains — overhead or underground — from the network connection point to your premises.
Switchboard & Metering
We install a new three phase switchboard, main switch, and three phase metering coordinated through AEMO as your accredited metering coordinator.
Energisation & Testing
The DNSP energises the three phase supply, all phases are tested and confirmed, and a certificate of compliance is issued.
Fully Accredited & Compliant
Licensed, accredited, and compliant with all NSW electrical and network requirements
Level 2 ASP — Class 2A & 2D Accreditation (NSW Fair Trading)
Current ASP Class 2A and 2D accreditation registered with NSW Fair Trading, authorising network-side service mains and connection works for three phase upgrades.
Ausgrid Accredited Service Provider
Authorised for three phase connection and service mains work across the Ausgrid network area covering Sydney, Inner West, Eastern Suburbs, and Northern Beaches.
Endeavour Energy Accredited Service Provider
Accredited for three phase upgrades and service mains work across Western Sydney, Hills District, Hawkesbury, and Sutherland Shire network areas.
Accredited Metering Coordinator (AEMO)
Registered to install and configure three phase metering and NMI updates in the AEMO registry as part of the upgrade process.
AS/NZS 3000 Wiring Rules Compliant
All switchboard and installation works completed to the Australian Wiring Rules with certificate of compliance issued on completion.
Work Health & Safety Act NSW Compliant
All works completed under documented SWMS, isolation procedures, and WHS requirements for network-side and switchboard installation.
When Do You Need Three Phase Power?
Installing a large ducted air conditioning system requiring three phase compressor
Ducted AC systems with three phase compressors cannot run on single phase supply — a full upgrade including DNSP application and new metering is required.
Workshop or industrial equipment requiring 400V three phase supply
Lathes, CNC equipment, and industrial machinery on acreage and commercial premises typically require 400V three phase supply from the network.
EV charging infrastructure requiring three phase for faster charging
Three phase EV chargers deliver significantly faster charging rates than single phase units and require a three phase incoming supply.
Home battery system sized beyond single phase inverter capacity
Large home battery systems with three phase inverters require a matching three phase supply and metering configuration to operate correctly.
Commercial fitout requiring three phase for kitchen, lift, or industrial equipment
Restaurant kitchens, commercial lifts, and industrial plant in Parramatta, Macquarie Park, and the CBD routinely require three phase supply from day one.
Why Choose Sedgman for Three Phase Upgrades?
End-to-End Management
DNSP application, service mains, switchboard, and metering all managed by one contractor — no coordination between multiple trades.
Level 2 ASP & Metering Coordinator
We hold both accreditations required for a complete three phase upgrade, including the network-side service mains and metering registration.
Correctly Sized
We calculate three phase maximum demand before specifying service mains and switchboard capacity — no under-sizing that limits future loads.
Other Supply Upgrade Services We Offer
Frequently asked questions
Straight answers about single phase to three phase power upgrades in Sydney.
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