How to choose the right cable?

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Published on Nov 22, 2021
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Why, when choosing a cable, its cross-section is not the main characteristic that is worth paying attention to? How to choose the right cable depending on the power consumption and circuit breaker? What to look for and what nuances influence the choice? Examples of miscalculations when selecting a cable for a socket, electric boiler, stove, input circuit breaker. Playlist about electrics and automation: • Fundamental electrics Playlist about repairs: • Fundamental repairs Timecodes: 00:41 - Who is this video for? 02:01 - The most important characteristic for choosing a cable 02:29 - The most common cables for home wiring 02:45 - Types of VVG cables 03:14 - Reduced fire hazard 03:40 - What does VVG(P) mean 03:50 - Different current load of cables with the same cross-section 05:14 - Why are some cables designed for a greater load than others? 06:21 - How does the number of cores affect the characteristics of the cable? 07:44 - Types of cables by cores and material 08:45 - How to correlate the machine rating with the cable characteristics? 09:12 - What cable and machine to connect the socket? 10:34 - Load limit and breaking capacity of the machine 11:32 - Calculating the cable rating for a 16A socket 12:46 - What to do if the installers laid the wrong cable in the wall? 13:31 - Examples of calculations for an electric stove, boiler, refrigerator 17:54 - What cable to connect the input machine and do the wiring in the electrical panel? 19:08 - Conclusions Example of calculations for each of the consumers: Stove 7 kW = 7000/220 = 31.8 A = 32 A = 32 * 1.45 = 46.4 A Boiler 6 kW = 6000/220 = 27.2 A, circuit breaker 32 A, 32 * 1.45 = 46.4. Stove 2.3 kW = 10.45 A, 10 A = 10 * 1.45 = 14.5 A Refrigerator 1 kW at peak = 4.45 A = 5 A = 7.25 A Input circuit breaker 63 A: 63 * 1.45 = 91.3 A #cable #electrics #repair

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