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What is Conduit

07/11/2025
by Rick Coleman
what is conduit

G'day! You've seen it everywhere. It's that classic grey pipe running up the side of a brick house, tucked neatly inside a garage, or keeping cables tidy in a workshop. That, mate, is electrical conduit.

It might not look like much, but this simple tube is a fair dinkum, non-negotiable part of any safe, professional, and long-lasting wiring job. But what's its actual meaning or purpose? Let's get the lowdown.

So, What is Conduit, Exactly?

At its heart, the meaning is simple: protection.

An electrical conduit is a protective tube or pipe that electrical cables are run inside. That's its one and only job. Think of it as a tough-as-nails bodyguard for the vulnerable, insulated wires inside, protecting them from all the things that could go wrong.

A "she'll be right" attitude of just clipping a bare cable to a wall in an exposed area is dodgy, unsafe, and just not how it's done. The conduit is the proper, professional way to protect that wiring.

Why is it So Bloody Important?

Using conduit isn't just about making the job look schmick (though it does that too). It's a critical safety and compliance measure.

  • Serious Physical Protection: This is the big one. It provides a tough, rigid barrier against physical impacts. It stops you from accidentally whacking the cables with a bit of timber, the whipper snipper, or the car door.
  • Weatherproof & UV Safe: You can't just run an indoor cable outside. The harsh Aussie sun will destroy the cable's insulation in no time, making it brittle and dangerous. Proper grey PVC conduit is UV-stabilised to handle the sun, and when installed correctly by a pro, it keeps the wiring safe from rain and moisture.
  • Pest and Vermin Protection: It makes it a hell of a lot harder for rats, mice, or possums to have a chew on your wiring, which can prevent short circuits and serious faults.
  • It's the Law (Compliance): The Australian Wiring Rules (AS/NZS 3000) – the tradie's bible – has very strict rules about where and how cables must be protected from mechanical damage. Using conduit is the standard, compliant way to meet these rules.
  • Makes Future Work Easier: A cable run inside a conduit is way easier for a qualified professional to upgrade or replace down the track. They can just pull the old wire out and feed a new one through.

The Main Types You'll See in Australia

Not all conduit is the same. You'll generally come across three main types:

  1. Rigid PVC Conduit (The Grey Workhorse): This is the one you see everywhere. It's tough, lightweight, easy for a pro to work with, and UV-stable for outdoor use. The most common sizes for home use are 20mm and 25mm.
  2. Metal Conduit (The Heavy Hitter): Usually made of galvanised steel, this is the heavy-duty option. You'll see it used in industrial and commercial jobs, or in workshops where there's a serious risk of big impacts.
  3. Flexible Conduit (Flexi or Corrugated): This is the bendy, corrugated tubing. It's a proper lifesaver for those awkward, fiddly runs, like connecting to a motor that might vibrate or navigating a tight, tricky space where you can't bend rigid pipe.

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 electrical conduit and a few fittings. That's fine. You can even mount the empty conduit on your shed wall.

But the absolute second you need to pull the 240V 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 circuit to your shed, they're going to do the job right with trade-quality gear. They won't be using flimsy, non-compliant conduit or dodgy fittings. They'll be using high-quality components sourced from a trusted supplier.

As one best of Australia's electrical wholesaler, Schnap Electric Products stocks the lot for the professional installer. They've got a massive range of high-quality electrical conduit in PVC, metal, and flexible options, plus all the compliant fittings a qualified professional needs – from the bends, couplings, and saddles to the high-quality cable glands and weatherproof boxes. And, of course, they supply all the top-grade 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.