Does a shed or workshop fed from your private power pole need its own switchboard and earth? Under AS/NZS 3000, an outbuilding only has to be treated as its own separate electrical installation once its maximum demand reaches 100 amps per phase and it has been fitted with its own switchboard. Below that threshold a shed, workshop or machinery bay usually just extends your home's existing wiring and earthing, which is a simpler and cheaper job to get right.

⚡ Quick Answers: Powering a Shed or Workshop From a Private Pole

Does every shed or workshop need its own switchboard? No. AS/NZS 3000 only forces a separate installation once the outbuilding's maximum demand reaches 100 amps per phase and it is fitted with its own switchboard.
Does a shed need its own earth stake? Only if it is wired as its own separate installation. A shed wired on a simple protective earth submain shares your home's existing MEN earth instead, with no second electrode needed.
Can two sheds on one property share an earthing method? Yes. What the standard calls combined outbuildings must use the shared submain earth method and are never allowed their own separate earth stake, even if each has its own switchboard.
Does a shed's own switchboard need a main switch? Yes. Any outbuilding fitted with its own switchboard needs a dedicated main or isolating switch so the whole building can be shut down in one place.
Does a new shed change what my private pole has to carry? It can. Whatever the shed draws gets added to your property's total maximum demand, which feeds directly into the pole's cable size and its own S rating.
Who decides whether the shed wiring counts as Level 2 ASP work? The private pole and the service cable feeding your property are always Level 2 ASP work. Wiring purely inside the shed, once power reaches its own switchboard, is standard electrician's work.

1. Why your shed's maximum demand decides everything

A lot of acreage and semi rural properties around Sydney run a private power pole out to a detached shed, machinery bay or home workshop rather than trenching underground the whole way. The question of whether that shed needs its own switchboard, its own main switch and its own earth is not a judgement call. AS/NZS 3000 sets a clear threshold: once the outbuilding's maximum demand reaches 100 amps per phase and it has been given its own switchboard, the standard treats it as a genuinely separate electrical installation, with its own earthing rules to match.

A small garden shed with a couple of lights and a power point rarely gets anywhere near that figure, so it is usually wired as a simple extension of the house's own circuits. A proper workshop with welding equipment, a compressor, power tools and its own lighting circuit is a different story, and often crosses that 100 amp line well before you would expect, in much the same way an EV charger or a growing solar and battery setup can quietly push a property's total demand higher than its original service was sized for.

2. Two ways AS/NZS 3000 lets you earth an outbuilding

Once you know roughly what the shed will draw, the standard gives you two genuinely different earthing paths for a single, individual outbuilding. The first is the simplest: run a submain with its own protective earth conductor out to the shed, tying its switchboard back into the same Multiple Earthed Neutral system that already protects your house. No second earth stake, no separate testing regime, just an extension of what you already have.

The second path only applies once the shed is genuinely treated as its own separate installation. Here the shed's distribution board is itself regarded as a main switchboard, complete with its own single MEN link and its own earth electrode, and the submain neutral feeding it becomes what the standard calls a combined protective earthing and neutral conductor. That earthing conductor between the shed's board and its own electrode is then treated as a main earthing conductor in its own right, with the same 0.5 ohm resistance limit and accessible, labelled connection point that applies at the house.

3. Individual outbuildings: the separate MEN option

This separate MEN path is really only worth considering for a workshop that is a genuine, standalone electrical installation in its own right, drawing a serious load well away from the house. The rules are specific: there must be no more than one MEN connection in that one outbuilding, the submain feeding it has to run either straight from the main switchboard or through other outbuildings to that one board only, and if it passes through another shed's board along the way, that intermediate board's terminals cannot be relied on for the earth conductor's continuity.

There is also a genuine safety reason behind one of the finer rules here: the standard specifically warns against bonding that combined earth and neutral conductor in parallel with conductive pipes or structural metal elsewhere on the property, since that can quietly create a second, unintended earth or neutral path running alongside the proper one.

4. Combined outbuildings: only one earthing method allowed

Where a property has more than one shed or outbuilding and they are wired together in what AS/NZS 3000 calls a combined arrangement, the choice disappears. Combined outbuildings must always use the shared submain earth method, and are never permitted to be set up as separate MEN installations, even if one of them individually draws enough load to otherwise qualify. Each shed's own distribution board still needs to be legibly identified, but only one of them, the main switchboard, carries the MEN link and the earth electrode for the whole combined group.

This matters in practice on larger rural blocks where a machinery shed, a second workshop and a stable or hobby farm building are all wired together progressively over the years. Treating one of those later additions as its own separate MEN installation, instead of running it off the shared submain, is a genuine compliance error we see on older properties and one that is picked up quickly during a proper electrical safety inspection.

5. The main switch every outbuilding switchboard needs

Whichever earthing method applies, any outbuilding fitted with its own switchboard needs a main or isolating switch mounted on that board, so the whole building can be shut off in one place without having to walk back to the house. If the shed is fed through more than one submain, each submain needs its own main switch, though they do not all have to be on the same physical board, provided a clear, permanent notice at each switch tells you where the others are. Any submain or final subcircuit inside the shed rated above 100 amps per phase also needs its own separate isolating switch at the board where that circuit starts.

6. What this means for your private pole's cable and S rating

A new shed or workshop does not exist in isolation from the rest of your supply. Whatever load it adds becomes part of your property's total maximum demand, and that figure is exactly what determines the service cable size your private pole has to carry and the pole or strut's own S rating under SIRNSW's sizing tables. If you are planning a genuine workshop with three phase machinery, it is worth getting that load worked out before the shed is framed up, not after, since upsizing a service cable or a pole once everything is built is a far more disruptive job than planning for it from the start. This is also where a shed project can tip an otherwise single phase property into needing a three phase upgrade, so it pays to have the conversation early, in much the same way a second connection point sometimes becomes the better answer once a block has two genuinely separate loads to supply.

Where the shed sits a reasonable distance from the pole or the house, voltage drop on that run matters too. A long, undersized cable to a workshop full of power tools and a welder is a common reason for lights dimming and motors struggling every time something heavy switches on, even when the pole and the house supply are both perfectly sized.

Why It's Level 2 ASP Work

Your private power pole, the service cable running to it and the point where that supply reaches your property are all Level 2 ASP work, meaning only an accredited Level 2 electrician can legally install, alter or reconnect them. Wiring purely inside the shed itself, once supply has reached its own switchboard, is ordinary licensed electrician's work. Because the two jobs usually happen together on one site visit, it is worth using a business that genuinely holds both: a standard electrical licence for the shed's internal wiring and Level 2 ASP accreditation for everything upstream of it.

How High Demand Electrical Helps

High Demand Electrical is one of Sydney's most trusted Level 2 ASPs, and a genuine amount of our private pole work involves exactly this kind of project: a new workshop, machinery shed or home business building going up on a pole fed property. We work out the shed's real maximum demand before anything is wired, confirm whether a simple submain earth or a separate MEN installation is the right call, size the private pole's own cable and S rating to match the finished load, and fit the main switch and labelling the standard requires at every board we touch. We are a licensed local team, not a call centre, and we service acreage and semi rural properties right across Sydney's fringe as comfortably as the terraces and rear lanes our Inner West team works on every week.

Shed and Workshop Power FAQs (Sydney)

Can I just run an extension lead to my new shed instead of wiring it properly?

No. A permanent extension lead run is not compliant wiring and will not pass an electrical safety inspection. Even a small shed needs a properly installed, fused and earthed circuit. See our electrical safety inspection service.

Does a granny flat count as an outbuilding under these rules?

A granny flat is usually treated differently again, since it is a habitable dwelling rather than a shed or workshop, and comes with its own metering and consumer mains sizing questions. Our Inner West team covers that side of things in does your converted garage, studio or granny flat need its own switchboard and earth.

How do I know if my planned workshop will hit the 100 amp threshold?

A Level 2 ASP or licensed electrician can work out your shed's maximum demand from the equipment you plan to run, using the same AS/NZS 3000 method used for the rest of your property.

Will a new workshop mean upgrading my private power pole?

Sometimes. If the extra load pushes your total maximum demand past what the existing service cable or pole was sized for, the cable and possibly the pole's own S rating will need to be reassessed.

Can I add a second shed later using the same earthing setup?

Yes, provided it is wired as a combined outbuilding off the same submain rather than as its own separate MEN installation, which the standard does not allow once more than one outbuilding shares that submain.

Planning a shed, workshop or machinery bay off your private power pole? Get a Power Pole Quote or call 0402 559 777. Every job needs a short site assessment before we can confirm scope or pricing, since the right earthing method and cable size depend entirely on what you are planning to put in the shed.

Does a Shed or Workshop Fed From Your Private Power Pole Need Its Own Switchboard and Earth?