Usually, two types of materials are used for making electric wires: Aluminum and copper. If you need them for home wiring, we suggest that you always opt for copper quality. Aside from this, you should go for wires with multiple strands rather than single-strand wires. The important thing is that the wire should have a quality mark called ISI. Secondly, you should look for the electrolytic grade. It is recommended that you buy copper wires with an electrolytic grade of 99.97%.
Size of the wire
Usually the most common size of the wires is between 1 sq mm and 4 sq mm. For AC points, the recommended size is 4 or 6 sq mm. For light points, the commonly used size is 1.5 sq mm and so on. It’s very important to go for the right size or you may be wasting your money on unnecessarily thick wires.
Insulation of the wire
Usually, good electric wires come with three layers of insulation. The first layer offers protection from water. The second layer offers protection from heat and the third layer gives protection from fire. Typically, fire and heat resistant products come with a quality mark of HRFR. Ideally, you should look for wires that can withstand a temperature of over 100 Celsius.
Wire insulation color
Since there are three phases, you should choose three different colors for the wires. Mostly, black is for the neutral wire. Green is used for the earth wire. But keep in mind that the color for the neutral and earth can be different based on the country you live in. For instance, in America, the live wires can be blue, red or black. On the other hand, the neutral is white or gray. In India, on the other hand, the green is the earth wire.
Length of the wire
You can check the length by looking at the pack. On the coil pack, you can read the length as well as the rates of the wires. Usually, the length is written in meters and most coils have 90 meters.