15 Jun 2026
At home, many electrical appliances appear to use the same power outlet. However, behind that, the power requirements of each device can be very different. AC units, rice cookers, and EV chargers, for example, do not always require the same cable circuit.
This difference is not simply about cable size, but also relates to safety, efficiency, installation lifespan, and everyday convenience.
Every Appliance Has Different Power Requirements
Electrical appliances operate with different levels of power consumption.
As a simple illustration:
Appliance Typical Power Rating
Rice Cooker 300 – 1,000 Watts
Residential AC Unit 500 – 2,500 Watts
Home EV Charger 2,200 – 7,700 Watts or more
The higher the power consumption, the greater the electrical current flowing through the electrical cable.
For this reason, a cable used for lighting or small appliances may not be suitable for equipment with high power consumption.
Rice Cookers: A Small Load, but Used Every Day
Rice cookers are considered relatively light in terms of power demand.
Even so, they are often used for long periods every day. Therefore, the quality of household cables and installation connections still needs to be considered to help prevent excessive heat.
In a properly designed installation, rice cookers can generally use a standard household cable circuit that matches the home's electrical capacity.
AC Units: Require a More Stable Circuit
AC units have different characteristics.
When the compressor starts operating, the electrical current required can be higher than under normal conditions. This is why many AC installations use a dedicated circuit from the electrical panel.
A dedicated circuit helps maintain stable voltage and reduces the risk of disturbances to other electrical appliances in the house.
In addition, the use of quality cables with good cable insulation also helps maintain installation performance over the long term.
EV Chargers: The Highest Power Consumption
EV chargers, or electric vehicle charging systems, are among the household devices with the highest power requirements today.
The battery charging process can continue for several hours without interruption. This condition requires the cable to carry high current for an extended period without experiencing excessive temperature rise.
For this reason, EV chargers generally require:
- A dedicated cable circuit
- Separate electrical protection devices
- Larger cable sizes
- An installation designed according to the required power capacity
A properly designed installation helps maintain safety while ensuring the vehicle charging process operates optimally.
Why Don't All Appliances Use the Same Circuit?
When too many high-power loads are connected to the same circuit, the cable may be forced to operate beyond its intended capacity.
The impacts may include:
- The cable becomes hotter
- Voltage drops occur
- The MCB trips more frequently
- The installation lifespan becomes shorter
- Energy efficiency decreases
For this reason, in electrical installation practice, separating circuits according to the type and size of the load is a common approach to improve system safety and reliability.
The Right Cable Helps Create a Safer Installation
A cable does more than simply transfer electricity from one point to another. It also plays a role in ensuring that electrical energy is delivered safely, efficiently, and reliably.
Whether for residential cables, building cables, commercial building cables, or industrial cable applications, selecting the appropriate cable size and type is an important part of a well-designed electrical installation.
With the growing demand for modern energy applications, from energy-efficient AC systems to electric vehicles, the use of the right power cable is becoming increasingly important in supporting safe and reliable electrical infrastructure.
Rice cookers, AC units, and EV chargers all use electricity, but their power requirements are very different. That is why each device may require a different cable circuit to ensure the installation operates more safely, more efficiently, and more comfortably in everyday use.
Behind every home, building, industrial facility, and modern infrastructure, electrical cables designed for the right application remain one of the key components supporting optimal energy distribution.
