How Many Square Millimeters of Wire Do You Need for Your Shower Heater?

The bathroom heater, commonly known as a "bathing bulb" in China, is an electrical appliance with high power consumption. When selecting the appropriate wiring, it is important to ensure it is suitable for safe usage. Below, we will introduce what size wire is needed for a bathroom heater.

What size wire is needed for a bathroom heater?

Generally, a 1.5 square mm wire is sufficient, but for safety reasons, it is advisable to use a 2.5 square mm wire for the main line. Each bulb of the bathroom heater is approximately 275 watts, with lighting around 40 watts, and the fan consuming between 35 to 55 watts. When totaled, this amounts to roughly 1200 watts, so a 1.5 square mm wire can handle this, but for the main line that carries multiple circuits, using a 2.5 square mm wire is safer.

What is the correct way to use a bathroom heater?

1. When connecting the bathroom heater with electrical wiring, it is essential to comply with relevant standards. For appliances with a high power consumption, selecting appropriate wiring is crucial. Since it will be installed in a bathroom, it is advisable to use sockets with waterproof features to prevent any accidents.

2. The installation position of the bathroom heater must be confirmed in advance. Generally, it is installed directly above the shower area; otherwise, it may inconvenience users. Additionally, the installation height should be about 10 cm higher than an average person's height to effectively prevent any risk of burns.

3. After turning on the bathroom heater, it should not be exposed to water. Although many models have some waterproof features, water could potentially enter the internal components and cause damage. Moreover, it is advisable not to touch it while in operation to avoid any unnecessary issues.

4. During regular use, do not frequently toggle the switch, as this may cause internal components to become loose, affecting its proper function. After prolonged usage, it is also necessary to clean the heater to maintain its efficiency.

In summary：regarding the wire size for a bathroom heater, a 1.5 square mm wire is generally sufficient, while the main line should ideally be 2.5 square mm for added safety.