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HV & Substations · Sydney · NSW Licensed

High Voltage & Substation Works Sydney Fixed price, done first visit

Commercial and industrial sites with HV switchgear, chamber or kiosk substations need specialist electrical contractors. We deliver the LV scope alongside HV partners on new works, upgrades and defect rectification.

NSW LICENSED|FULLY INSURED|LIFETIME WARRANTY

Licensed & Insured
5★ Google Reviews
Fast Sydney Response

Get an emergency Sydney electrician on the way

Free phone advice · Clear pricing provided before any repair work proceeds

24/7 callout · Real Sydney electrician, not a call centre

Or call now: 0468 404 608 · Available 24/7

WHAT WE DO

High Voltage & Substation Works - what's included

Commercial and industrial sites with HV switchgear, chamber or kiosk substations need specialist electrical contractors. We deliver the LV scope alongside HV partners on new works, upgrades and defect rectification.

  • LV scope for new kiosk and chamber substations
  • HV switchgear installation coordination
  • Transformer connection and LV distribution
  • Substation earthing and equipotential bonding
  • HV/LV cable installation and termination
  • Defect rectification for insurer or network audits

HV & SUBSTATIONS · SYDNEY

High Voltage & Substation Works in Sydney — done properly, first visit

High voltage and substation electrical work sits at the top of the commercial electrical scope — new kiosk substations for large developments, chamber substation refurbishments for strata and industrial sites, transformer replacements, and LV distribution downstream of the transformer. Empire Electrical Contractors delivers the LV scope end to end and coordinates with accredited HV partners for the switching, testing and commissioning that requires HV tickets.

Typical projects include a new commercial fit-out where the tenancy needs a dedicated transformer and metering; a strata scheme with an aging chamber substation that has been served an insurer or Ausgrid defect notice; and a light-industrial site upgrading from a padmount transformer to a kiosk arrangement to free up land. We handle the LV switchgear, cable ladders and trays, main switchboards, distribution boards, earthing and bonding, and the compliance documentation the network operator requires for energisation.

Every HV/substation project is delivered against a written program with defined hold points for HV switching, insulation testing, protection testing and network sign-off. $20M public liability and full workers cover — insurance certificates and induction paperwork provided for every site.

HOW THE JOB RUNS

Every hv & substations job, same 4 steps

  1. STEP 1

    Scope and site walk

    We attend site with your engineer, project manager or strata manager, review the HV/LV scope, and confirm the program and hold points.

  2. STEP 2

    Design coordination

    We coordinate with the electrical consultant on cable sizing, protection settings, earthing design and metering — nothing gets built without a design review.

  3. STEP 3

    Install and terminate

    HV/LV cable install, transformer connection, LV switchboards, distribution and metering — all to network and AS/NZS 3000 requirements.

  4. STEP 4

    Test, commission, certify

    Insulation, earth loop and protection testing complete, HV switching coordinated with accredited partners, and full compliance package issued.

Signs you need hv & substations

When to book a hv & substations sparky

  • New commercial development requiring a dedicated substation
  • Aging chamber substation with an Ausgrid or insurer defect notice
  • Transformer replacement or capacity upgrade
  • New HV/LV cable run between substation and main switchboard
  • Strata scheme with intermittent HV faults or earthing concerns
  • Light-industrial site upgrading its supply capacity
  • Substation earthing audit and remediation

SYMPTOMS & CAUSES

What we usually see with hv & substations

Symptoms you tell us about
  • Ageing transformer nearing end of life
  • New tenancy requires HV capacity increase
  • Substation inspection overdue
What actually causes it
  • Load growth exceeding transformer rating
  • Oil-filled equipment past service life
  • Missing HV maintenance records

OUR PROCESS

How we handle every hv & substations job

Same repeatable sequence on every job — no shortcuts, no surprises, no invoices you didn't agree to.

  1. 1

    Assess

    HV licensed engineer inspects the substation and reviews SLDs and maintenance history.

  2. 2

    Coordinate outage

    Outage window planned with Ausgrid and the customer, temporary generation arranged if needed.

  3. 3

    Install and commission

    Switchgear or transformer installed, protection settings tested and commissioned.

  4. 4

    Certify

    HV compliance documentation, thermographic scan and 5-year maintenance plan issued.

Typical on-site duration: about 80 hours, depending on access and switchboard condition.

FIXED PRICING

What you'll pay for hv & substations

$25,000–$250,000 AUD per project

Every job is fixed-priced on site before we touch anything. No hourly meter, no call-out surprise.

Typical duration
80 hrs
Workmanship warranty
24 months
Compliance
CCEW issued

Included in every fixed price

  • HV licensed labour
  • Switchgear or transformer
  • Protection commissioning
  • Compliance documentation

COMPLIANCE

Standards we work to

Applicable standards
  • AS 2067 — Substations and HV installations
  • ENA NENS 04 — Isolation procedures

Every job includes a Certificate of Compliance for Electrical Work (CCEW) so your installation is on record with Fair Trading NSW.

Call us straight away if…
  • Any HV work above 1kV
  • Substation inspection or repair
  • Capacity upgrades

24/7 Emergency Response

Real Sydney electricians on stand-by - day, night, weekends and public holidays.

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Empire Electrical service van on a Sydney street at night for a 24/7 emergency callout

Fully Licensed & Insured

NSW licensed electrical contractor with full public liability insurance.

Request Help
NSW licensed Empire electrician beside a fully stocked service van in Sydney

Upfront, Honest Pricing

Clear recommendations and pricing provided before any repair work proceeds.

Get a Callback
Empire electrician inspecting a Sydney home switchboard before quoting the repair

Lifetime Workmanship Warranty

If our workmanship ever fails, we come back and fix it. Free.

View warranty details
Empire Electrical service vehicle arriving at a Sydney home for a warranty visit

VOLTEX SPECIALIST

25-year RCBO, GPO & switch warranty

Plus 7-year replacement on Voltex internal & external lighting.

Empire Electrical across all of Sydney

Empire Electrical Contractors bring licensed, insured emergency electricians to homes and businesses across the entire Sydney metropolitan area.

From the Eastern Suburbs and Inner West to the North Shore, Northern Beaches, Sutherland Shire, Hills District, Western Sydney and the South - our vans are on the road around the clock for urgent power, switchboard and safety faults.

Same number, same fast response - 24 hours a day, 7 days a week.

HV & Substations FAQs

High Voltage & Substation Works - questions we hear

MORE SERVICES

Other electrical work we handle

Fully licensed, fully insured, one crew for everything.

Switchboard Upgrades

Safe, compliant switchboard replacements and upgrades

View Switchboards details

LED Downlights & Lighting

LED downlights, feature lighting and full home relights

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EV Charger Installation

Home EV chargers installed properly, first time

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Ceiling Fans

Ceiling and exhaust fans supplied and installed

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Smoke Alarms

Compliant hardwired and 10-year lithium smoke alarms

View Smoke Alarms details

Hot Water Systems

Electric hot water repairs, replacements and installs

View Hot Water details

Data & TV Points

CAT6 data, TV points and antenna installation

View Data & TV details

Commercial Fit-outs

Shop, office and cafe electrical fit-outs

View Commercial details

Electrical Fault Finding

Diagnose tripping, dead circuits and mystery faults — fast

View Fault Finding details

Level 2 Electrical Services

Accredited Level 2 ASP — service lines, meter work and mains upgrades

View Level 2 ASP details

High Voltage & Substation Works

HV switchgear, transformer and substation electrical works

View HV & Substations details

CCTV & Security Systems

IP CCTV design, installation and configuration

View CCTV details

Security Alarms

Back-to-base and self-monitored security alarm systems

View Alarms details

Air Conditioning

Split system and ducted air-con install, repair and service

View Air Con details

Solar & Battery Systems

Grid-connect solar, batteries and EV-ready system design

View Solar & Battery details

Optical Fibre Splicing & Testing

Fusion splicing, OTDR testing and OS2/OM4 fibre install

View Fibre details

Wireless Access Points

Enterprise Wi-Fi design, install and configuration

View WiFi APs details

Appliance Repairs

Ovens, cooktops, dishwashers, washing machines and more

View Appliance Repairs details

Underfloor Ventilation

Subfloor fans and moisture ventilation for Sydney homes

View Underfloor Vent details

Insurance Electrical Works

Storm, water and fire damage electrical scope for insurers

View Insurance Works details

Preventative Maintenance

Scheduled electrical maintenance for homes, strata and business

View Maintenance details

Thermal Imaging

Thermal scans of switchboards, motors and cable joints

View Thermal Imaging details

Test & Tag

Portable appliance testing and tagging for workplaces

View Test & Tag details

5 STAR RATING

What Sydney customers say

S

Shirish Shetty

June 2026 · Google review

Absolutely outstanding electrician and genuinely one of the best people to work with. He diagnosed and fixed the issue within a couple of hours. He was professional, efficient, and reliable.

J

Jie Z (Jessica)

June 2026 · Google review

VERY HIGHLY recommend! We had an issue with power at home and needed someone urgently to restore the electricity service. They responded quickly, showed up on time, and got everything back up and running without any hassle.

V

Vin J

March 2026 · Google review

I highly recommend Joe, he's very skilled, kind and does honest work. He did a massive last minute job for us, installing an entire 17.4kw ducted aircon system after our old unit broke.

J

Jennifer Cornish

November 2025 · Google review

Exceptional Service - Highly Recommend! I contacted Joe from Empire Electrical to install new powerpoints and downlights. His professionalism, punctuality, and thoroughness stood out.

J

Jasmin Cumming

July 2025 · Google review

I am so glad I called Empire Electrical. Joe is a very honest person which is hard to come by. He explained everything to me and charged me an incredibly fair price.

N

Noreen De Gracia

July 2025 · Google review

It was an extremely exceptional service from Joe! He came to replace my cooktop on my rented unit then went above and beyond liaising and explaining with my property manager.

E

Eric Lau

July 2024 · Google review

I recently had Joe fix two exhaust fans at my place, and I couldn't be more satisfied with the service. Joe showed up on time, explained everything clearly, and fixed the issues quickly.

Real jobs · Real Empire team

Recent work across Sydney

Switchboard faults, urgent callouts, residential and commercial - handled by the same licensed team.

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  • Empire electrician pulling cable across a commercial slab in Sydney
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  • Empire electricians loading equipment on a Sydney service vehicle
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    Council & infrastructure
  • Switchboard repair and fault finding by Empire Electrical in Sydney
    Empire team
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  • Empire electricians repairing a street pole electrical fault in Sydney
    Empire team
    Urgent callouts
  • Empire electrician installing a chandelier in a Sydney home
    Empire team
    Residential work
  • Empire electrician working on a kitchen cooktop install in Sydney
    Empire team
    Kitchen & appliance
  • Empire electricians arriving at a Sydney home for a service call
    Empire team
    On-site, on time
  • Empire electrician laying underground electrical conduit in Sydney
    Empire team
    Underground mains
  • Empire electrician standing next to a fully stocked service van in Sydney
    Empire team
    Fully stocked vans
  • Empire electrician pulling cable across a commercial slab in Sydney
    Empire team
    Commercial fit-outs
  • Empire electricians loading equipment on a Sydney service vehicle
    Empire team
    7 days a week
  • Empire electricians servicing a solar street light near Sydney apartments
    Empire team
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Empire Electrical Contractors Sydney team

Our Mission

At Empire Electrical Contractors, we're committed to being Sydney's most trusted emergency electrician - whatever the time, whatever the fault.

Our licensed team is equipped with the knowledge, tools and stocked vans to handle any emergency electrical job - from a tripping safety switch at 3am to a burnt switchboard that needs replacing today.

Call us 24/7 to speak with a real Sydney electrician. Clear recommendations and pricing provided before any repair work proceeds.