Written by H. Irwin Electrical | Published on July 2025
Commercial, industrial, and domestic electrical work are three distinct categories, each requiring different skills, equipment, and licensing. A domestic electrician rewires your home, a commercial electrician fits out a shop or office, and an industrial electrician handles heavy machinery and high-voltage systems.
If you are in Adelaide and trying to figure out which type of electrician you need, this guide covers the key differences, what each category involves, and how to choose the right professional for your job.
Understand What Domestic Electrical Work Actually Covers
Domestic electrical work covers everything inside a private home or residential property. This includes single-family homes, townhouses, units, and granny flats.
Typical domestic jobs include:
- Switchboard upgrades and circuit breaker replacements
- Powerpoint and light fitting installations
- Ceiling fan and exhaust fan wiring
- Safety switch and smoke alarm installations
- Electric hot water system connections
- Home EV charger installations
- Outdoor lighting and garden power circuits
- Solar system connections and meter upgrades
In South Australia, domestic electrical work must comply with AS/NZS 3000 (the Wiring Rules) and all work must be completed by a licensed electrician. A Certificate of Compliance is required for most new installations.
H. Irwin Electrical handles domestic work across Glenelg, Somerton Park, Plympton, Marion, Glandore, and surrounding suburbs. Homes in these areas often have older wiring that needs careful assessment before any upgrade work begins.
Understand What Commercial Electrical Work Involves
Commercial electrical work covers non-residential buildings used for business purposes. This includes retail shops, offices, restaurants, cafes, medical centres, schools, and apartment complexes.
Commercial jobs are generally more complex than domestic work because they involve:
- Three-phase power systems rather than single-phase
- Larger switchboards with more circuits and higher load demands
- Emergency and exit lighting systems
- Data and communications cabling alongside power
- Commercial air conditioning and refrigeration connections
- Energy metering and sub-metering for tenants
- Compliance with Australian Standard AS/NZS 3000 and additional commercial codes
- Coordination with builders, project managers, and other trades
Commercial projects in Adelaide suburbs like Unley, Hyde Park, North Adelaide, Henley Beach, and Prospect often involve heritage buildings or older shopfronts. These require extra planning to bring electrical systems up to current standards without damaging existing structures.
When comparing a commercial vs domestic electrician in Adelaide, the commercial side demands broader project management skills and a deeper understanding of load calculations and compliance documentation.
Understand What Industrial Electrical Work Means
Industrial electrical work is the most technically demanding of the three categories. It covers factories, manufacturing plants, warehouses, mining operations, water treatment facilities, and heavy industrial sites.
Industrial electricians work with:
- High-voltage systems above 1000V
- Motor control centres and variable speed drives
- Programmable logic controllers (PLCs)
- Industrial automation and instrumentation
- Hazardous area classifications and explosion-proof equipment
- Large transformers and switchgear
- Uninterruptible power supplies (UPS) for critical systems
Industrial electricians in South Australia often hold additional licences and endorsements beyond the standard electrical licence. The safety stakes are significantly higher, and shutdowns for maintenance must be carefully planned to avoid production losses.
Compare the Three Categories Side by Side
Here is a quick comparison table to help you identify which type of electrical work applies to your situation.
| Factor | Domestic | Commercial | Industrial |
|---|---|---|---|
| Typical location | Houses, units, townhouses | Offices, shops, restaurants | Factories, warehouses, plants |
| Power supply | Single-phase (240V) | Single or three-phase | Three-phase, high-voltage |
| Switchboard size | Small, 6-20 circuits | Medium to large | Very large, complex |
| Compliance docs required | Certificate of Compliance | Multiple certificates, plans | Detailed safety documentation |
| Project coordination | Minimal | Moderate to high | High |
| Typical cost range | $150 to $5,000+ | $1,000 to $100,000+ | $10,000 to $1,000,000+ |
These are approximate figures. Every job is different and pricing depends heavily on scope, materials, and access conditions.
Compare Licensing Requirements for Each Type in South Australia
Licensing is one of the clearest ways to understand the difference between electrical categories. In South Australia, the Consumer and Business Services (CBS) office manages electrical licensing.
| Licence Type | What It Covers | Who Needs It |
|---|---|---|
| Electrical Worker Licence | All general electrical work including domestic and commercial | All licensed electricians |
| Electrical Contractor Licence | Running an electrical business and issuing compliance certificates | Business owners and sole traders |
| High Voltage Endorsement | Working on systems above 1000V | Industrial and utility electricians |
| Refrigeration and Air Conditioning | Handling refrigerants alongside electrical work | Specialists in HVAC |
Always ask your electrician to show their licence before any work starts. A valid licence protects you legally and financially if anything goes wrong.
H. Irwin Electrical holds all relevant licences for domestic and commercial electrical work across Adelaide. From Kurralta Park to Beverley to West Beach, the team operates fully compliant on every job.
Identify Which Type of Electrician You Need for Your Adelaide Project
Choosing the wrong type of electrician can cause delays, failed inspections, or safety issues. Here is a straightforward way to identify what you need.
You need a domestic electrician if you are:
- Renovating or extending your home
- Adding powerpoints, lights, or fans to a house or unit
- Upgrading a switchboard in a residential property
- Installing a home EV charger or solar battery system
- Connecting a pool pump or garden lighting circuit
You need a commercial electrician if you are:
- Fitting out a new shop, cafe, office, or medical practice
- Upgrading power in an existing commercial tenancy
- Installing emergency lighting in a public building
- Managing a multi-tenancy building with sub-metering
- Running three-phase power to commercial equipment
You need an industrial electrician if you are:
- Working with machinery that draws high current loads
- Installing motor controls or automation systems
- Operating in a classified hazardous area
- Managing a large manufacturing or processing facility
Many electricians in Adelaide are licensed for both domestic and commercial work. If you are not sure which category your project falls into, a quick call to H. Irwin Electrical on 0432 270 757 will get you a clear answer without any obligation.
FAQs on Commercial vs Domestic Electrician Adelaide
Can a domestic electrician do commercial work in Adelaide?
A licensed electrician in South Australia can legally work on both domestic and commercial properties under their electrical worker licence. However, commercial work requires additional knowledge of three-phase systems, load calculations, and compliance documentation. Always confirm the electrician has relevant experience before hiring for a commercial job.
What is the difference between single-phase and three-phase power?
Single-phase power is the standard supply to most Adelaide homes, providing 240V on one active wire. Three-phase power delivers 415V across three active wires and is used in commercial and industrial settings to run larger equipment more efficiently. If you are unsure what supply your property has, check your switchboard or ask a licensed electrician.
Do I need a Certificate of Compliance for commercial electrical work?
Yes. In South Australia, a Certificate of Compliance is required for any new electrical installation or significant alteration, whether domestic or commercial. For commercial projects, additional documentation such as as-built drawings and test reports may also be required by the building certifier or local council.
How much more does commercial electrical work cost compared to domestic?
Commercial electrical work generally costs more due to the complexity of the systems, the need for project coordination, and the cost of commercial-grade materials and switchgear. A simple domestic job might cost a few hundred dollars, while a commercial fitout can run into tens of thousands depending on scope and size.
Can H. Irwin Electrical handle both residential and commercial jobs in Adelaide?
Yes. H. Irwin Electrical services both domestic and commercial clients across Adelaide, including suburbs like Glenelg, Unley, Prospect, Fulham, Richmond, and North Adelaide. Call 0432 270 757 to discuss your specific project and get a quote.
Is it legal to do my own electrical work in South Australia?
In South Australia, it is illegal for unlicensed people to carry out electrical work. Even minor tasks like replacing a powerpoint or wiring a light fixture must be done by a licensed electrician. Unlicensed work can void your home insurance and create serious safety hazards.
Wrap Up and Next Steps
Domestic, commercial, and industrial electrical work are genuinely different disciplines. Knowing which category your project falls into helps you hire the right person, set realistic expectations on cost and timeline, and avoid compliance issues down the track.
Whether you have a home in Somerton Park that needs a switchboard upgrade or a cafe in Hyde Park that needs a full commercial fitout, H. Irwin Electrical has the experience and licences to get the job done properly. Call us today on 0432 270 757 to discuss your project and get a no-obligation quote.
