G'day! If you've ever had a squiz at a professional wiring job, you've seen that classic grey conduit. The 20mm and 25mm stuff is the bread and butter for running cables to your power points and lights, and they do a ripper job.

But what happens when you're not just running a single power line? What if you need to run the main feed to a whole new sub-board in the shed, or bundle a heap of data and power cables together for a new home office? That's when you'll see a pro reach for the bigger guns. You're now in the territory of 32mm conduit.

So, What is 32mm Conduit, Exactly?

A 32mm conduit is simply a rigid, protective electrical pipe with a 32mm diameter. It's the next size up from the common 25mm, and its one and only job is to be a tough-as-nails bodyguard for the electrical cables run inside, protecting them from impacts, moisture, and the harsh Aussie sun.

It's the workhorse for bigger, gruntier, or more complex cable runs.

Why Go for 32mm? (The 'Bigger is Better' Argument)

So why would a licensed electrician choose 32mm conduit over the standard 25mm? It all comes down to space, grunt, and a bit of smart thinking.

• It's for Big, Grunty Cables: This is the main reason, mate. When you're running a high-power circuit – like a 'sub-main' to feed a whole new switchboard in a granny flat or a workshop with a welder – you're using a much thicker, heavy-duty cable (like 16mm² or 25mm²). These simply will not fit in a 25mm pipe. A 32mm conduit has the space to handle these big boys.
• Bundling Multiple Cables: This is a huge one. Need to run power, lights, and the NBN connection out to a detached home office? Trying to pull all those cables through a 25mm pipe is a recipe for a bad day. A 32mm pipe keeps it all neat, protected, and manageable in one single run.
• Easier to Pull (Less Hard Yakka): Every tradie knows that pulling cables can be hard yakka, especially on a long run or with a few bends. More space in the pipe means less friction, which makes the cable pull a hell of a lot easier and reduces the risk of damaging the cables as they go in.
• Future-Proofing, Mate! (The Pro Move): This is the mark of a smart installer. Even if the current job just fits in a 25mm, a good tradie will often install a 32mm conduit. Why? Because it leaves you room to easily pull another circuit through in a few years without having to dig a new trench or run a whole new pipe. It's a lifesaver.

Where You'll See It Used

• Sub-Mains: The number one use. Feeding power to sheds, workshops, pool pumps, and granny flats.
• High-Power Appliances: Running dedicated circuits for massive air conditioners or other heavy machinery.
• Data & Comms: Often used as the main "lead-in" conduit for NBN or for running large bundles of data cables in a commercial fit-out.
• Rising Mains: In apartment blocks, larger conduits are used to run the main power supply up to each level.

The CRITICAL Safety Warning: This is NOT a DIY Job!

Righto, let's get dead serious for a sec. You, as a DIYer, can walk into any hardware store and buy a length of 32mm conduit and a few fittings. That's fine. You can even mount the empty conduit on your shed wall or bury it in a trench (as long as you follow the depth rules!).

But the absolute second you need to pull the 240V or 415V electrical cables through it and connect them, you MUST STOP.

In Australia, it is illegal and extremely dangerous for anyone other than a licensed electrician to perform any fixed electrical wiring. A simple mistake can lead to a fatal electric shock or a house fire, and it will void your home insurance in a heartbeat. Don't be a galah – it's just not worth the risk.

A Professional Job Needs Professional Gear

When a licensed electrician turns up to run that new sub-main, they're going to do the job right with trade-quality gear. They won't be using flimsy, non-compliant materials. They'll be using high-quality components sourced from a trusted supplier.

As one of Australia's most electrical wholesaler and supplies, Schnap Electric Products stocks the lot for the professional installer. They've got a massive range of heavy-duty, UV-stabilised 32mm conduit, plus all the compliant fittings a qualified professional needs – from the sweeping bends and couplings to the glands and weatherproof boxes. And, of course, they supply all the top-grade heavy-duty electrical cable to run inside it. For a job that's safe, compliant, and built to last, the pros rely on a supplier like Schnap Electric.