Written by Chris · Licensed Level 2 ASP Electrician · Licence 397193C · Published 8 November 2026

What Are the Electrical Requirements for a Panel Beater or Smash Repair Workshop in Sydney?

What are the electrical requirements for a panel beater or smash repair workshop in Sydney? A smash repair workshop needs dedicated circuits for compressors, welders and vehicle hoists, RCD protection across the whole workshop floor, careful switchboard planning around spray booth equipment, and in most cases three phase power once compressed air, welding and hoist loads are added together. Fitting out a panel beating shop in a converted industrial shell without this assessment is one of the most common ways equipment ends up underpowered from day one.

1. Dedicated circuits for compressors and welding equipment

A workshop's air compressor is usually the single heaviest continuous load on site, cycling on and off throughout the day to maintain pressure for spray guns, impact tools and sanders, and it needs a dedicated circuit sized for both its running current and its starting surge. Welding equipment adds its own demanding, often intermittent load on top, and under AS/NZS 3000's requirements for non domestic installations, direct connected equipment carrying an increased risk of electric shock needs RCD protection as part of that circuit design.

Running a compressor and welder off circuits originally sized for lighting and general power points is a common shortcut in converted industrial shells and a frequent cause of nuisance tripping once the workshop is operating at full capacity.

2. Vehicle hoist power supply

A vehicle hoist's motor draws a meaningful starting current every time it lifts a car, and that load needs its own correctly sized circuit rather than sharing capacity with compressors or hand tools. Our guide to vehicle hoist wiring in a workshop covers the detail of isolator placement and circuit sizing that applies equally to a panel beating shop running one or several hoists.

Workshops planning more than one hoist, or a heavier capacity hoist for commercial vehicles, should have that equipment list confirmed before the switchboard is designed, not added as an afterthought once the concrete floor is already poured.

3. RCD protection across the whole workshop floor

Workshops carry a genuinely higher risk profile than a typical retail or office fit out, with portable tools, extension leads, metal panels and damp conditions from washing vehicles all part of normal daily work. AS/NZS 3000 recognises this by requiring RCD protection on final subcircuits in non domestic installations supplying socket outlets, lighting and direct connected equipment that carries an increased shock risk, which covers most of a panel shop's working floor.

A workshop washing vehicles or panels as part of the repair process also needs the same wet area thinking applied to a car wash or detailing bay, since hosing down panels and equipment is routine rather than occasional.

4. Switchboard planning around spray booth equipment

A spray booth involves flammable paint vapours, and its fans, lighting and any switches need to be specifically suited to that environment rather than treated as ordinary workshop fittings. This is a specialist assessment best done alongside your spray booth supplier and a licensed electrician together, since the equipment manufacturer's own installation requirements and the site's electrical design both need to line up correctly.

Spray booth circuits are also usually kept electrically separate from the rest of the workshop's general power, so a fault or isolation elsewhere on site does not interrupt booth ventilation mid job.

5. Three phase power for combined workshop loads

Once a compressor, welding equipment and one or more vehicle hoists are all added together, the combined load usually makes more sense on three phase power, which spreads demand across three separate phases and handles larger motor starting currents more comfortably than a single phase connection. Our guide to three phase motor starters and isolators for NSW workshops covers the detail of how this equipment is correctly isolated and protected once the upgrade is in place.

Deciding on a three phase upgrade early, ideally before signing a lease on an industrial unit, avoids discovering the limitation after equipment has already been ordered and delivered.

6. Planning for equipment growth

Panel shops tend to add equipment as the business grows, a second hoist, additional compressed air outlets, upgraded spray booth extraction, and a switchboard with no spare capacity turns every one of those additions into an expensive retrofit. Building genuine headroom into the original fit out, even at some extra upfront cost, is almost always cheaper than a switchboard upgrade a year or two after opening.

Why it's Level 2 ASP work

Standard circuit and equipment connections within an existing single phase supply sit with a licensed electrician. It becomes Level 2 ASP work once the workshop's genuine demand, compressor, welding, hoists and spray booth extraction combined, exceeds what the existing connection can safely deliver. Getting this assessed before fit out works begin avoids an expensive surprise partway through the project.

How High Demand Electrical helps

High Demand Electrical is a licensed local team, not a call centre, servicing smash repair and panel beating workshop fit outs for businesses across Sydney's West, South West and Sutherland Shire. We assess your actual equipment list, from compressors and welding gear through to hoists and spray booth extraction, design dedicated circuits where shock risk and nuisance tripping are genuine concerns, and give you a straight answer on whether a switchboard upgrade or three phase connection makes sense before you commit to a tenancy. If your workshop also needs a full electrical safety inspection, we can scope that in the same visit. Our sister site HD Power Pole covers the same three phase planning question for industrial sites in its guide to three phase power and private power poles, where heavy equipment loads drive exactly the same capacity decisions.

Get an Electrical Safety Inspection Quote

If you are fitting out a panel beating or smash repair workshop in Sydney, talk to High Demand Electrical before you order equipment or sign a lease. Get an Electrical Safety Inspection Quote or call 0402 559 777. Every job needs a site assessment before scope or pricing can be confirmed.