Which circuit breaker to choose? Wire section and cable section. The choice of wire cross-section for wiring in a house or apartment. The choice of the machine for connecting electrical wiring lines.
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00:00 - What information is now available on KZfaq on the cross section of wires and cables?
00:32 - The main factor to consider when choosing the cross section of wires and cables.
00:43 - Is it worth it to overpay for the use of electrical wiring with a large cross section?
00:53 - What problem does a novice electrician face when choosing a wire and cable section?
01:11 - 2 views on the choice of cable cross-section for electrical wiring.
01:53 - Table of cross-sections of wires and cables.
02:08 - How to use the wire and cable section table?
02:35 - Should I use aluminum wiring now?
02:46 - Current characteristics of circuit breakers.
03:18 - A new table of wire cross-sections and selection of circuit breakers from popular bloggers.
03:48 - Why does the wiring really catch fire?
04:02 - What sections of wires and what circuit breakers are installed in new buildings.
04:37 - New table of wire section and selection of circuit breakers, which I recommend.
05:15 - Rated current of circuit breakers.
05:31 - Emergency operation of circuit breakers.
06:14 - What is the difference between the current characteristics of domestic and foreign circuit breakers.
06:41 - Variation of current characteristics of circuit breakers depending on temperature.
07:30 - Table of wire cross-sections from PUE. The temperature regime of the wires.
08:18 - Deterioration of the cooling of wires and cables, as a violation of the thermal regime of wires and cables.
08:37 - What to do if the temperature regime of cables and wires is violated?
08:55 - An example of choosing a cable section and a circuit breaker for connecting a washing machine.
09:42 - Minimum section of copper cable for wiring.
10:09 - Why is a DIF automatic or RCD installed on a washing machine?
10:34 - What you need to know first of all when choosing a cable for connecting electrical appliances?
10:54 - Case study. How did the power of electrical appliances change over time.
11:21 - How to choose the cable section and circuit breaker, if we do not know the load.
11:33 - Methods of direct control over the power of connected devices.
12:07 - What to do if it is not realistic to control the power of the connected devices?
12:53 - In what cases should I make a margin for a cable or wire?
13:54 - How to increase the service life of electrical wiring?
14:10 - How to minimize heat losses in electrical wiring?
14:24 - Increasing the short circuit current by selecting the cable section.
14:56 - Support the video about the choice of cable section and machines with like, repost, comment.
The cross section of the wires and the selection of circuit breakers for protecting electrical wiring also depends on how this electrical wiring is operated.
In what cases is it even better to use wiring with a margin over the cross section
1. Cable laying in heat-insulating material. This often happens in frame houses with hidden wiring.
2. Laying in a corrugation or cable channel, since inside the air is also a heat insulator.
3. The number of consumers is not known in advance and a line is made with a power margin.
4. It is not possible to control the load on the line and consumers can connect a load more than the line is designed for.
5. If the current in the line is close to the maximum current. Do not use the line in limit modes.
6. If you need to play it safe on the line power. If money allows, it is better to overpay and make all the wiring in the house with a current margin.
7. Increasing the service life of electrical wiring. With increased cross-sections, the wiring heats up less and the insulation will last longer. And the aging of insulation is the most common reason for changing electrical wiring.
8. If there is a lot of wiring and it is actively used, the heating losses of the wiring can be significant.
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