Lights and fans are easy to automate. The appliances that actually move your electricity bill — the geyser, the AC, the water motor — draw far more current, and a standard smart switch isn't built for them. That's what a 16A smart switch is for. Here's how it works and how to use it safely.
Why Heavy Appliances Need a 16A Switch
A light draws under 1 amp; a geyser or AC can draw 10–16 amps continuously. A normal 6A/10A smart switch would overheat. A 16A-rated switch uses a heavier relay and wiring designed for sustained high current — the same reason your geyser has its own 16A socket.
16A Smart Switch vs 16A Smart Plug
| 16A smart plug | 16A smart switch | |
|---|---|---|
| Installation | Plug into a 16A socket | Wired into the switchboard |
| Visible on the wall | Yes | No — hidden |
| Best for | Appliances that plug in (AC, geyser with plug) | Hard-wired loads (motor, geyser on a switch, AC point) |
| Renter-friendly | Yes | Needs an electrician |
If your appliance plugs into a socket, a 16A smart plug is simplest. If it's wired to a wall switch, a 16A smart switch is the cleaner, permanent solution.
The Right Product for Each Job
- One heavy load: the AZIOT 1 Node 16A Smart Switch — perfect for a geyser, motor, or AC point.
- Lights + one heavy load on the same board: the AZIOT 4 Node Plus (1 × 16A) handles three normal loads plus one 16A load.
- A whole room with a heavy load: the 7 Node IO (6 normal + 1 × 16A).
What You Can Automate
- Geyser: heats for 20 minutes before your bath, never all day. See automating your water heater.
- Water motor: fills the tank on a timer and auto-stops.
- AC point: cut power fully when away; pre-cool before arriving.
- Energy monitoring on select models shows exactly what each heavy appliance costs.
Safety Rules for Heavy Loads
- Match the switch rating to the appliance — never run a 16A load on a 10A device.
- Have an electrician install it; heavy-load wiring must be correct and earthed.
- One heavy appliance per 16A node — don't chain loads.
- Pair with a voltage protector so spikes don't damage the appliance. See protecting appliances from voltage fluctuations.
Bottom Line
For the appliances that cost the most to run, a 16A smart switch gives you scheduling, remote control and monitoring — hidden in the wall, built for the load. Compare all options in our appliance-by-appliance guide.
Automate the heavy stuff safely: browse AZIOT 16A smart switches today.