Many people often have a question about calculating an electrician at home. It looks especially relevant when the repairs in the apartment are already coming to an end and the money remaining in the stock is already running out. As a rule, many zealous owners want to do a seemingly rather simple job themselves, but at the same time they either do not think it over, or simply forget to take into account a number of important factors.
Necessary
tape measure, table of the dependence of the cross-section of the conductor on the current flowing through it
Instructions
Step 1
So where should you start your calculations? First of all, you need to think about how much and where exactly you will have electrical appliances, as well as what kind of power consumption they have in aggregate. As a rule, you can glean this information on its case, from the technical documentation accompanying the electrical device itself, or from the Internet.
Step 2
Having calculated the total power of the electrical equipment, then you need to calculate the currents that it consumes. Since the standard voltage supplied to any apartment or house is 220 V AC, it is easy to calculate the value you need from the following formula based on Ohm's law: I = P / U (A).
Step 3
Having received the necessary information, you just have to decide on the type, cross-section and length of the cable in order to lay it from the point of consumption (outlet or light bulb) to your switchboard.
Step 4
The last step in the calculation of the electrician is the selection of circuit breakers that will be installed in the switchboard. In principle, single-pole machines are quite suitable for your household needs. The required rating is determined according to the same principle as the cable cross-section, but in this case you should not take too much current margin. This can lead to the fact that your machine does not turn off during the occurrence of damage to your electrical network, since its operating current will be greater than that generated in the wiring. As a result, damage or complete failure of the electrical appliance is possible.
