How To Choose A Cable For Power

Table of contents:

How To Choose A Cable For Power
How To Choose A Cable For Power

Video: How To Choose A Cable For Power

Video: How To Choose A Cable For Power
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Most often, when choosing an electric wire, the cable cross-section is calculated in terms of power. This is due to the fact that in the documents that are attached to electrical devices, and on special plates attached to their back wall, the value of the power required for the operation of this or that equipment is indicated. Often, for a more accurate power calculation, the maximum power value of the electrical appliance is indicated.

How to choose a cable for power
How to choose a cable for power

It is necessary

  • - paper;
  • - pencil;
  • - calculator.

Instructions

Step 1

A properly selected cable in terms of power, namely its cross-section, will ensure the smooth operation of all electrical equipment. A washing machine, cable, microwave oven and other household appliances, without which it is quite difficult to imagine the life of a modern person, operate on electricity transmitted through a cable. If its cross-section is insufficient, the wiring will regularly overheat, which will lead to destruction and complete loss of insulation properties. In this case, you should not choose a section "with a margin", since it is unprofitable from the financial side. All this suggests that the correct calculation is simply necessary.

Step 2

To do this, it is necessary to calculate the total power consumption, which is necessary to ensure the operation of all household appliances and electrical equipment used in the apartment. For example, if you need to lay electrical wiring in a house using a VVG cable, write down a list of all equipment on separate paper.

Step 3

The manufacturer attaches a special tag to the electrical equipment with information about the characteristics of the device. The units of measure for power are Watts and Kilowatts, denoted by the letters W and kW respectively. Record the wattage of each fixture and add all values.

Step 4

If in total you got 20,000 W, which corresponds to 20 kW, then the maximum load on your electrical wiring will be 20 kW per hour. This is in view of the fact that all devices will be turned on. But as a rule, they are rarely turned on at the same time, so you need to determine the number of devices used at the same time. Let's say it will be 80%. Therefore, the value that was obtained when summing up the power of the equipment will need to be multiplied by a factor of 0, 8. The result obtained will need to be used when calculating the cable.

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