If the total power is 3.1 kW, then:
For calculations with a three-phase load, the same formula is used, but angular shifts are taken into account, which can reach large values. They are usually indicated mexico email list 8 million contact leads on the connected equipment.
Calculating the rated current
The nominal current can be calculated based on the documentation for the electrical wiring, but if it is not available, it is determined based on the characteristics of the conductor.
The following data is required for calculations:
cross-sectional area of the conductor
the material used for the cores (copper or aluminum);
method of laying.
In domestic the importance of crm and marketing automation for your business conditions, wiring is usually located in the wall.
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An example from everyday life:
For apartment 220 V The resulting current
Let’s assume that you plan
To turn on the following equipment in your apartment at the same time: vacuum cleaner – 250 W, boiler – 2200 W, computer – 350 W, washing machine – 600 W, iron – 400 W, TV – 100 W and lighting at 800 W. In total, this is 4700 W. In order not to philippines numbers change the wiring due to the purchase of, for example, a microwave, we will add 30% to the obtained value in advance, that is, 1410 W. We get 6110 W. Multiply by the utilization factor of 0.8 and get 4888 W. Using the formula In = P / U, we find: In = 4888/220 = 22.22 A. This means that you need to buy a machine with a rating of 25 A.
For a private house 380 V 15 kW
Assuming that you will use the wiring to the maximum, 15000 multiplied by the utilization factor of 0.8 will give you 12000. Using the same formula, we calculate In = 12000/380 = 31.6 A. The closest circuit breaker is 32 A.
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Mistakes when buying The resulting current
The most common mistake is to buy an input circuit breaker with a rating lower or higher than necessary.
