There are three main ways to find out what phase power your home has.
1. Check the number of 'main switches' on your house's switchboard/fusebox
On the board, there will be a number of 'poles' that have switches on them. Look for a pole that has a label called the 'Main Switch' (sometimes called the 'normal supply main switch') and count the number of corresponding switches.
- If there are 3 switches, you're running 3-phase power
- A single switch indicates you're on single phase.
Sometimes the Main Switch is red, which is extra helpful:
2. Check your house's switchboard/fusebox to see if the phase is written on it
Sometimes the board will have the phase written on it in words or symbols.
- Words to look out for are:
Single Phase, Mono-phase, 1-phase (for single)
Tri-Phase, Polyphase, 3-phase (for 3-phase). - Symbols to look out for are:
An on/off arrow with a single switch (for single)
An on/off arrow with 3 switches (for 3-phase) like the image, below.
3. If you're an AGL electricity customer you can simply ask us
We have the phase information for our customer's homes, so if all else fails, give us a call.