Commercial Business Rewiring
Commercial business rewiring replaces unsafe, unsuitable or overloaded electrical wiring so your workplace can safely support its lighting, equipment and day-to-day operations. Camma Electrical assesses the existing installation, plans work around your business, installs and tests the new work, and explains any practical decisions before the job moves ahead.
5.0★
Local rating
REC 36165
Licensed electrician
Fast
Local response
$20M
Public liability
What does commercial business rewiring involve?
Commercial business rewiring is the planned replacement or alteration of electrical wiring, circuits and related equipment in a workplace.
It can be a full rewire of an older shop, office, warehouse or clinic, or a targeted upgrade to the areas that no longer suit how the business operates. The scope depends on the building, its existing electrical condition and what needs to run there now. A small office adding workstations has different needs from a workshop adding machinery or a retail tenancy being refitted.
The aim is not simply to put new cable in walls and ceilings. It is to create a sensible electrical layout for the way staff and customers use the premises, with circuits, outlets, lighting and protection matched to the load and environment.
- Replacement of ageing or damaged wiring
- New circuits for equipment, lighting or work areas
- Additional power points in practical locations
- Switchboard changes where the existing board no longer suits the work
- Lighting changes as part of a fit-out or layout change
- Testing and verification once electrical work is complete
Rewiring is different from adding one outlet
Adding a single outlet may be a small extension of an existing circuit. Rewiring looks at the circuit itself, its condition, capacity, protection and the way it supplies the area. If the underlying wiring is not suitable, adding more outlets can leave the original problem in place.
A full rewire is not always necessary
A proper inspection may show that only part of the installation needs attention. For example, an older rear storeroom, a renovated tenancy area or a heavily used kitchen section may need new wiring while other parts of the premises remain suitable. The electrician should explain what is being replaced, what can remain and why.
How do I know if my business needs rewiring?
A business may need rewiring when its electrical installation no longer safely or practically supports the way the premises is being used.
Frequent tripping, warm or damaged fittings, unreliable power, extension leads becoming permanent fixtures and repeated changes to a tenancy layout are all reasons to have the installation assessed. These signs do not automatically mean the entire building needs replacement wiring, but they are worth taking seriously rather than working around them.
Older wiring can also become a concern during a renovation or when new equipment is introduced. A circuit that was adequate for a few lights and a desk may not suit a bank of computers, refrigeration, a commercial kitchen appliance or workshop equipment.
- Circuit breakers or safety switches tripping repeatedly
- Power points, switches or plugs showing damage or heat marks
- Extension leads and power boards being relied on every day
- Lights dimming or equipment losing power when other items start
- A tenancy change, renovation or new equipment installation
- Old, untidy or altered wiring discovered in ceilings or walls
Repeated tripping needs an electrical assessment
A circuit breaker or safety switch is there to disconnect power when it detects a problem. Resetting it may restore power temporarily, but repeated tripping needs investigation by a licensed electrician. The cause could be a faulty appliance, a circuit carrying too much demand, damaged wiring or another fault.
Business growth can expose an old electrical layout
Many workplaces change gradually. More desks appear, point-of-sale equipment is added, storage becomes a work area, or a former office becomes a treatment room. Rewiring may be the right answer when the original electrical layout was never designed for the current use.
What gets checked before a commercial rewire?
Before commercial rewiring starts, a licensed electrician needs to inspect the existing installation and understand how the business uses the space.
The inspection is used to identify visible condition issues, existing circuits, switchboard arrangements, likely cable routes and the equipment that needs power. Access restrictions matter too. Work above a ceiling, behind fixed joinery or through a busy retail area needs a different plan from work in an empty tenancy.
The discussion should cover present use as well as foreseeable changes. It is cheaper and less disruptive to allow for an extra workstation area or future item of equipment while walls and ceilings are already open, provided it is genuinely likely to be needed.
- Current equipment and where it is used
- Future equipment or layout changes you expect
- Existing circuits and switchboard capacity
- Access through ceilings, walls, floors and joinery
- Hours when power interruptions will cause the least disruption
- Whether the work involves public, staff or specialist areas
The condition of the building affects the scope
Commercial premises are rarely blank shells. There may be old fit-out wiring, concealed cables, suspended ceilings, masonry walls, shared tenancy services or access limits. These conditions can change the safest practical route for new wiring, so an inspection is more useful than a guess made from photos alone.
Load means the electrical demand of your equipment
Load is the amount of electrical demand placed on a circuit or installation. A rewiring plan considers what equipment runs, whether it runs at the same time and which items need their own circuit. This helps avoid a layout that appears fine on paper but struggles during a normal busy day.
What standards apply to commercial rewiring?
Commercial rewiring must be designed, installed and checked by a licensed electrician against the requirements that apply to the installation.
AS/NZS 3000:2018 sets requirements for the design, construction and verification of electrical installations. It is commonly called the Wiring Rules. In plain terms, it guides how an installation is put together so electrical equipment, cable routes, protection and testing are considered as one system rather than as separate quick fixes.
The Wiring Rules cover a wide range of premises and situations, which is why commercial work should not be treated as a simple larger version of domestic work. A workplace may have public access, particular equipment, wet areas, higher electrical demand or operational risks that need to be addressed in the design.
- Electrical design matched to the intended use of the premises
- Suitable circuit protection and isolation
- Cable routes selected for the building conditions
- Equipment selected and installed for its location
- Testing and verification after the work
- Clear discussion of any site-specific electrical issues
The Wiring Rules are broader than a cable guide
AS/NZS 3000:2018 covers the selection and installation of electrical equipment that forms part of an electrical installation. That matters in a business rewire because a good outcome involves more than replacing cable. The board, circuits, outlets, lighting and connected equipment all need to work safely together.
Some workplaces have extra considerations
AS/NZS 3000:2018 cites 83 other standards. A commercial site may need extra consideration where it includes battery equipment, specialised work areas or unusual operating conditions. The right approach is to identify those features at the inspection stage instead of assuming every business premises has the same requirements.
Can my business stay open while rewiring is done?
Many commercial rewiring jobs can be staged around business operations, but the practical answer depends on access, safety and when power must be isolated.
A shop may be able to keep trading while work is completed in a back room, then schedule interruptions outside trading hours for the main area. An office may move staff from one zone to another while new circuits are installed. A workshop with fixed production equipment may need a more defined shutdown window.
The important point is to plan the sequence before work starts. A clear plan identifies areas that must be empty, equipment that needs to be shut down, times when power will be off and who on site needs to know. That reduces surprises for staff and customers.
- Separate the premises into workable stages where possible
- Arrange access to ceilings, cupboards and electrical boards
- Identify equipment that cannot be switched off without planning
- Keep public areas safe and clearly separated from work zones
- Schedule unavoidable interruptions at the most suitable time
- Allow for testing before an upgraded area returns to use
Worked example: rewiring an occupied office
Consider a small office replacing an outdated reception area and adding six workstations. First, the electrician inspects the switchboard, existing circuits and ceiling access. Next, the business identifies a quiet Friday afternoon for the reception power interruption. New circuits and outlets are installed in the workstation area while staff use another room, then the reception area is isolated, rewired, tested and returned to service before the next workday.
Some interruptions cannot be avoided
There are times when power must be isolated so work can be completed safely. A licensed electrician can explain which interruptions are necessary, what areas they affect and how the work can be sequenced. It is better to plan a short, controlled interruption than to risk staff working around exposed or incomplete electrical work.
When does a switchboard need attention during rewiring?
A switchboard may need upgrading or alteration when it cannot safely accommodate the circuits, protection or capacity required for the rewired area.
The switchboard is the point where circuits are protected and controlled. If a business is adding circuits for new equipment or replacing old wiring, the board needs to be assessed as part of the job. Simply fitting new outlets downstream does not address a board that has no suitable room, protection or arrangement for the new work.
An electrician will look at the existing board in context. The outcome might be additional circuit protection, a reorganisation, replacement components or a wider switchboard upgrade. The work required should be based on the actual installation, not assumed from the building age alone.
- Space for required new circuits
- Condition and arrangement of existing protective devices
- Identification of circuits for safer day-to-day use
- The electrical demand of new and existing equipment
- Whether an older board suits the proposed work
- Safe access for isolation and future maintenance
Circuit protection is not optional extra work
Circuit protection is designed to disconnect a circuit when conditions become unsafe. In a commercial rewire, it needs to suit the circuit and the equipment connected to it. The electrician will assess this as part of designing the new work, rather than treating it as an afterthought.
Battery equipment may affect the wider installation
A January 2020 amendment to the Wiring Rules added references to AS/NZS 5139, the safety standard for battery systems used with power conversion equipment. If your premises has or is planning battery equipment, raise it during the initial discussion so it can be considered alongside the wider electrical installation.
What can go wrong with a cheap or poorly planned rewire?
A poorly planned commercial rewire can leave a business with inconvenient power locations, overloaded circuits, unnecessary disruption or electrical work that needs to be revisited.
The cheapest scope is not always the least expensive outcome. If the work is quoted without a proper understanding of the premises, important details can emerge after ceilings are opened or equipment is moved. Clear scope, inspection and communication help reduce that risk.
Another common problem is designing only for the furniture layout visible on the day. A power point hidden behind a cabinet, a circuit shared by incompatible equipment or a switchboard with no sensible allowance for future work can frustrate staff long after the renovation is finished.
- Work scoped without an inspection of the existing installation
- Insufficient circuits for equipment used at the same time
- Outlets placed where they are difficult to access
- Temporary leads becoming a permanent workplace solution
- Electrical interruptions not planned with the business
- Old and new electrical work left without a coherent layout
Hidden conditions should be handled openly
Concealed wiring and building construction can reveal conditions that were not visible at the first inspection. If that happens, the electrician should explain what was found, why it matters and what practical options are available before additional work proceeds. That conversation helps you make an informed decision.
Do not ask staff to work around electrical faults
Do not rely on staff to reset circuits repeatedly, use damaged outlets or manage a maze of temporary leads. If something is tripping, overheating, damaged or unreliable, arrange for a licensed electrician to inspect it. Electrical work should never be improvised by unlicensed people on site.
How should I prepare for a commercial rewiring quote?
The best commercial rewiring quote starts with a clear description of how your business uses the premises now and what you need to change.
You do not need to know electrical terms to prepare. A simple list of equipment, a marked-up floor plan, photos of the affected rooms and notes about operating hours give the electrician useful starting information. Mention any issue that has already occurred, such as tripping circuits, difficult access or equipment that cannot be shut down easily.
Be clear about whether the work is tied to a lease, renovation, tenancy handover, new equipment delivery or a planned opening date. Those details affect the order of work and whether other trades need to be coordinated.
- A floor plan or simple sketch of the affected area
- Photos of the switchboard and work areas where safe to take them
- A list of equipment that needs power
- Expected changes to desks, rooms, machinery or displays
- Preferred times for access and any planned shutdowns
- Details of builders, shopfitters or other trades involved
Ask for the scope in plain language
A useful quote should make clear what areas are included, what electrical work is proposed and what assumptions have been made about access or existing conditions. If a term is unclear, ask. You should be able to understand what is being allowed for before deciding whether to proceed.
Compare the work included, not just the total
When comparing quotes, look at whether each one covers the same work. One price may include circuits, switchboard changes, testing and fittings while another allows for only part of that scope. A lower figure is not a meaningful comparison if important work has been left out.
Why use a licensed electrician for business rewiring?
Commercial business rewiring should only be carried out by a licensed electrician because it involves electrical safety, compliance and work that affects everyone using the premises.
Camma Electrical is run by a working electrician and holds Victorian Registered Electrical Contractor licence REC 36165. That means you can deal with someone who understands the job on site, from the first inspection through to explaining the finished work.
A licensed electrician can assess the installation, complete the work properly and test it once complete. They can also help separate genuine electrical priorities from changes that can be planned later, which is useful when a business renovation has competing costs and deadlines.
- Assessment of the existing installation before major work begins
- Practical advice based on the way the premises is used
- Work planned around access, staff and business operations
- Testing after the electrical work is completed
- Clear explanation of scope, interruptions and site conditions
- Victorian Registered Electrical Contractor licence REC 36165
Good advice is specific to the premises
A commercial rewire should not be sold as a standard package. The right scope depends on the building, the business activity, equipment, access and future plans. A site inspection gives the electrician a better basis for advice than a broad estimate based only on floor size.
Electrical work affects the whole workplace
Rewiring can affect staff areas, customer areas, stock, equipment and trading hours. Using a licensed electrician helps keep the electrical work properly coordinated with the practical realities of the site. It also means you have a qualified person to ask when a condition or design choice needs explanation.
What happens when you contact Camma Electrical about rewiring?
When you get in touch about commercial rewiring, we will arrange for a licensed electrician to discuss the premises, inspect the relevant electrical work and explain the next practical step.
Start by telling us what is changing in the business and any symptoms you have noticed. We will ask useful questions about the building, equipment, access and timing, then inspect the site where needed. You will get a straightforward explanation of what we find and what work may be required.
If you decide to proceed, the work is planned around the agreed scope and site conditions. We will discuss access, any required power interruptions and what needs to be moved or made available before the job. Once work is complete, the installation is tested and the finished work is explained to you.
- Tell us about the building, business activity and planned changes
- Point out any tripping circuits, damaged fittings or unreliable areas
- Arrange a suitable time for site access and inspection
- Receive a clear explanation of the proposed electrical work
- Plan access and interruptions before work begins
- Have the completed work tested and explained
Bring up urgent safety concerns straight away
If there is burning smell, visible damage, sparking, electric shocks or an electrical fault affecting the workplace, tell us when you contact us. Keep people away from the affected area where safe to do so and do not attempt electrical repairs yourself. A licensed electrician can advise on the safest next step.
You can start with a simple description
You do not need a finished electrical plan before making contact. A description such as “we are turning two rooms into offices” or “our workshop circuits keep tripping” is enough to begin. We can then work through the details during the inspection and discussion.
CLIENT REVIEWS
WHAT CLIENTS SAY
20 reviews on Google →
Common Questions
How much does commercial business rewiring cost?
Commercial rewiring cost depends on the condition of the existing installation, access, the size of the area, equipment requirements and whether switchboard work is needed. An inspection is usually the sensible starting point because two premises with the same floor area can need very different work. Ask for the scope in plain language so you can see what the quote includes.
How long does it take to rewire a business premises?
The time required depends on the amount of wiring being replaced, building access, business operating hours and whether the work is staged. A targeted rewire may be arranged around normal operations, while a full tenancy rewire can require a clearer shutdown plan. Your electrician should discuss the sequence and likely interruptions before the work is booked.
Can an office be rewired without closing the business?
An office can often remain partly operational if the rewiring is staged safely and access is planned, but some power interruptions may still be necessary. Work may be completed zone by zone, with staff moved from affected areas. The practical approach depends on ceiling access, equipment, public access and whether safe separation from the work area can be maintained.
Do I need a switchboard upgrade when rewiring my business?
You may need switchboard work if the existing board cannot safely support the proposed circuits, protection or electrical demand. It is not automatic for every rewire, which is why the board should be inspected as part of the initial assessment. A licensed electrician can explain whether changes are required and how they relate to the rest of the electrical work.
What is the difference between commercial rewiring and an office fit-out?
Commercial rewiring focuses on the electrical wiring and circuits that supply a workplace, while an office fit-out is the broader alteration of the space. A fit-out may include rewiring, lighting, data cabling, partitions, joinery and furniture. Rewiring can also be completed on its own when existing electrical work is unsuitable, even without a full renovation.
Sources
- Standards New Zealand — AS/NZS 3000:2018 sets requirements for the design, construction and verification of electrical installations.
- Standards Australia — A January 2020 amendment to the Wiring Rules added references to AS/NZS 5139, the safety standard for battery systems used with power conversion equipment.
- NSW Government — AS/NZS 3000:2018 is commonly known as the Wiring Rules.
Planning a business renovation, dealing with unreliable power or upgrading an older premises? Get in touch to discuss your commercial rewiring needs with a licensed electrician.
Get a free, no-obligation quote from your local licensed electrician.