Efergy energy monitors use 'CT sensor clamps' to measure power consumption. And to capture all your usage they need either one clamp for single-phase or three clamps for three-phase.
Thankfully, the Efergy transmitters are the same for both types of power supply. Each transmitter can accept up to three clamps. So if you make a mistake, it doesn't matter, you can always add an extra CT clamp (or two) later.
Here are two simple ways to check if your home or business has one or three phases connected:
- Single -Phase or Three-Phase - Service Fuses
Single-phase sites have one 'service fuse' and three-phase site have three.
A service fuse is a large black rectangular fuse. They're generally quite easy to spot at your main switch board or meter board.
- Single-Phase or Three-Phase - Main Switch
Another way to identify three-phase from single-phase is the width of the main switch. Single-phase switches are 'one pole' wide, whereas three-phase switches are 'three poles' wide.
These 'Main Switches' are usually found at your meter board. In larger premises or unit blocks you can also find main switches at each sub board or distribution board.