Tips for Installing a Safety Ground Wire for Home Appliances

Do you feel discomfort from static electricity when you touch some household electrical products? In this article, Dien May XANH will guide you to the solution for this common problem – connecting the ground wire.


1. What is a ground wire?

The ground wire, also known as the earth wire, is a short electrical wire that connects appliances using high voltage (220V), such as water heaters, washing machines, and refrigerators, to the ground. It serves to solve the problem of electrical leakage from these appliances.

Ground wire

2. Why should we connect the ground wire to appliances?

Appliances like water heaters and washing machines are often placed in high humidity areas like kitchens and bathrooms. This can cause the electric motors and internal circuits to become wet and lead to electrical leakage. The metal casing of these appliances also makes it easy for electricity to transmit, increasing the risk of unexpected electrical accidents for users who accidentally touch them.

Electric shock when touching the metal surface of the device

In addition, during winter, static electricity is more likely to occur on the surface of these devices, resulting in “static electric shock” when touched. In Vietnam, 3-prong sockets with hot wire jacks, cold wire jacks, and grounding holes are not commonly found. Furthermore, equipment manufactured for Vietnam sometimes only have 2 pins to reduce costs, making electrical leakage more likely to occur. Therefore, grounding is considered a simple and safe measure to prevent electrical accidents.

3-pin socket

3. What equipment requires grounding?

Appliances that use water, such as washing machines, refrigerators, dishwashers, and drying equipment with metal housing designs, should be prioritized for grounding to ensure safety during use.

Devices should be grounded

4. Instructions for connecting the ground wire easily

Step 1: Insert a copper or iron metal rod approximately 1m deep into the ground (the deeper, the better).

You can easily find a metal rod and wire at nearby electrical stores. Use a drill to create a hole in the wall or floor, insert the metal rod, and connect it to the wire.

Connect the wire to the iron bar and plug it into the ground

Step 2: Connect one end of the wire from the device’s case or grounding part to the metal bar.

Find a screw attached to the device, loosen it, wrap the end of the power cord around the screw, and tighten it again.

Connect the ground wire to 1 screw on the device

If you are not confident in connecting the ground wire, it is advisable to seek the assistance of an electrical technician to ensure safety.