Electrical wire sizes in mm

Electrical wire sizes in mm, I would like to state from the onset that my discussion is limited or confined to electrical wires used in house wiring. For this reason, I will talk about common circuits used in electrical house wiring.

In domestic or residential premises, most of the load is lighting and sockets outlets. This does not mean that you will find lighting and sockets outlets only.

In modern homes, you will find air conditioners, electric geysers for hot water and electric cookers. Therefore, the electric wire sizes discussion is based on the circuits. Electrical wire sizes in mm(millimetres)can either mean the diameter of the wires or the cross-section area of the wires.

Allow me to say that throughout this talk, I will be referring to the cross-section area of the wires in millimetres. In the following paragraphs, you will know electrical wire sizes in mm and uses.

Table of Contents

Electrical wire sizes in mm for lighting.

In electrical wires for lighting, it must click in your mind that I am talking about wires that you run in a home, to circulate electric current through all the lighting fixtures in the home. Light fixtures like Led downlights, wall sconce, Bathroom lighting, chandeliers and led strip lights.

The recommended electrical cable size in mm for lighting circuits in residential premises is 1.5mm2. Let it be known to you that this does not include the insulation sheath. This is the cross-section area of the copper component of the electrical wires.

Wire size for sockets outlets.

Socket outlets are a place where you plug in your Television set, Laptop and many other home appliances. For these gadgets and appliances to work properly, you must use the correct cable size.

Why should you use the correct cable size? You do this to protect the home appliances from being damaged and protect people from electric shocks.2.5mm2.Is the recommended cable size for power socket outlets.

I must mention here that at times, you can power domestic airconditioners using 2.5mm2. cable size.

Geyser electrical wire size.

how much mm wire is required for a geyser? The geyser cable size is 4mm2 for all your water heater(geyser).

The reason you use a 4mm squared geyser wire size, is to allow the current drawn by the water heater or geyser, to pass through with less electric resistance.

The more current an appliance draws from the supply, the larger the geyser wiring size cross-section area used. What is the 4mm cable amp rating? The 4mm wire amp rating is 22A-30A.

Electrical wire size for air conditioner.

What is the electrical wire size for Airconditioner? Here you can use either 2.5mm or 4mm cable. the size of the air conditioner is what determines the electrical wire to use. Not only the size but also the distance from the supply to the location of the air conditioner. What do I mean? You might have an air conditioner that can work well with a 2.5mm cable. Then you notice that is very far from the distribution board.

You can use a 4mm cable to compensate for the voltage drop.

Cooker circuits, stove wire size mm.

6mm squared cables

what size cable for a cooker circuit? You use 6mm2 cables. This is also dependent on the power consumption of the cooker unit. At times you might find that stove wire size mm of 6mm2 is not sufficient to supply the needed current.

What do you do? In this case, you can use a 10mm2 cable. what is the 10mm wire amp rating? This is the current that a 10mm cable can carry safely without overheating.

The typical current rating for a 10mm cable is 39A-54A and the recommended circuit breaker is 40A.

Electrical wire sizes in mm and uses.

Wire size in mm squaredUses of wire.
I.5mmLighting circuits in a domestic application.
2.5mmSocket outlets circuit and air conditioners
4mmWater and air conditioners
6mmCooker circuits
10mmservice drop
Electrical wire sizes in mm and uses.

What is the difference between 1.5 mm2 and 2.5 mm2 cables?

The major difference is that a 1.5mm2 cable is mainly used in lighting while a 2.5mm2 cable is used for socket outlets .1.5mm2 can carry up to 10 Amperes current while a 2.5mm2 cable can cary up to 25 amperes of current.

Electrical wire size chart in mm.

Below I have put an electrical wire sizes chart. It is going to show you the electrical cable size in mm and the current rating and the recommended circuit breaker rating.

Electrical wire sizes chart in mm.
electrical cable size chart amps.

Wire size amp rating.

Ampacity is the maximum current that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.

Current is measured in amperes (amps.) You must use the correct size of wire for the current (load) requirement to prevent the wire from overheating.

The number and type of electrical devices connected to a circuit determine the current requirement of the conductor.

To calculate the load requirement for a circuit, first, add up the wattage of all the electrical devices that will be on the circuit. Then, divide the total wattage by the voltage of the system, typically 120V or 220V, and that will give you the required current in amps.

What is your experience working with electrical cables? Do you have any questions or contributions to make? You are free to make your contribution and ask your questions in the comments section below.

Electrical wire sizes in mm

7 thoughts on “Electrical wire sizes in mm

  1. This information is very much correct and easy to understand keep it up cause I have fully understood all the concept

    1. Thanks, Paul for your feedback. I appreciate it.

  2. what is the size for electrical leads in construction work

    1. Hi Andre, Your question is quite general for me. It would be easy to specify the leads for which equipment or machine.

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