Calculation of the cable section for the water heater. Repair tips
The most common and inexpensive wire for connecting a boiler to a 220 volt. Copper, brands of SHVVP with a cross section of 2 x 2.5 mm. This section can withstand the load up to 20 amperes. With a boiler power of 1.2 kW, the current load will be only 5.45 amperes. The wire in a corrugated self-adjacent hose is attached to the wall with dowels “Fast Installation” with Mr. Dowels diameter. 10 mm, stud diameter. 8 mm.
You can also lay the wire in the prepared strobe. For this you need a peorator with a pointed pike or a grinder with a diamond circle. To facilitate the stroke, you can use the joints of concrete plates. The wire with a cross section of 2 x 2.5 mm is laid from the installation site of the boiler to the machine, and from it to the counter.
Before connecting the boiler to the mains, be sure to turn off the electricity in the apartment or in the house. The wire that approaches the boiler is connected to special terminals in the boiler using a crossroads. The accumulative boiler is often equipped with a thermostat, so water heaters in this performance are more economical and reliable in operation.
Boiler connection diagram to the mains.
After attaching the wire to the machine or traffic jams, you do not need to turn on the power, since it is still necessary to close the stroke with plaster.
Now you can start commissioning. First, the boiler tank is filled with water from a cold water supply. Open the ball valve after the tee on the drain tank. Then immediately open the crane on the DHW line so that the air from the boiler leaves, freeing up a place under water. Also open the mixer or a hot water faucet. In the kitchen or in the bathroom.
After filling out the tank, water will go from the mixer. You can close it. The boiler is filled, the water in it creates a small pressure, so wait 0.3-2 hours and check all the compounds for the water leak. When the drops appear at the joints, close the nuts on the fittings.
Choosing a cable and a machine gun
When repairing in new apartments, a separate wiring is usually carried out directly from the shield for the boiler. If you want to connect the boiler to the old common wiring, on which several sockets are already connected, be sure to make sure that it will withstand the boiler power.
In most cases, with a power of up to 3.5 kW, the wiring should be performed by a 3-residential copper cable of VVGGNG-LS, with a cross section of at least 2.5mm2.
The three.Wire cable is necessary in order to ensure constant connection with grounding.
Boiler connection machine, choose two.Pole. The rated current of the machine 16a (enough at a boiler power up to 3.5 kW).
With a load of up to 2 kW, a circuit breaker with a rated current 10A is suitable.
Choosing a cable and a machine gun
When repairing in new apartments, a separate wiring is usually carried out directly from the shield for the boiler. If you want to connect the boiler to the old common wiring, on which several sockets are already connected, be sure to make sure that it will withstand the boiler power. In most cases, with a power of up to 3.5 kW, the wiring should be performed by a 3-residential copper cable of VVGGNG-LS, with a cross section of at least 2.5mm2.
The three.Wire cable is necessary in order to ensure constant connection with grounding.
Boiler connection machine, choose two.Pole. The rated current of the machine 16a (enough at a boiler power up to 3.5 kW).
Ремонт бойлера. Бойлер не включается и не греет
With a load of up to 2 kW, a circuit breaker with a rated current 10A is suitable.
Which assault rifle is 1 5 square?
Automobile ratings for current tables of copper cores of cable, sq.MICPUNSED LUNNED current, anomal current of the machine, A1,519102,525164352564232 LAND
Grounding is used to protect a person from electric shock. With normal operation of the electrical appliance, its case is securely isolated from the current.Passing parts. To ensure such grounding, Europeans added a grounding wire to the electrical wiring.
Calculation of the cable section according to the table
As mentioned earlier, the cable selection table and wires are used for convenience when calculating when connecting and installing household electrical appliances. Working with her is much more convenient and easier than with complex formulas.
To begin with, we note that a parameter that has a direct impact on the selection of the cable cross section of the load: its type, that is, it is necessary to take into account the resistance of the conductor. It is known that in various metals it can have different values: for example, representatives of the group of noble metals have the lowest resistance indicator. However, the production of an electric cable made of gold or platinum is an unacceptable luxury, so that copper and aluminum conductors are most often used to ensure power supply.
In our case, we will just consider tables for copper and aluminum cables in rubber or plastic braids used in household electrical networks.
In the table below, the cable cross section is calculated by current or power. Interconnected parameters. It is easy to work with such tables. The only feature that must be taken into account when determining the desired value: power or current indicators must be rounded towards increased.
Calculation of the cable section by power
Here is a simple example, explaining how the correct selection of the cable of power for the water heater can be carried out if this indicator is 5 kW.
From the table we should look at its value for 5.7 kW. The section of copper conductive core for the wire in this case will be 2.0 kV.Mm. But, since this value is recommended. Then it is best to take a cable with a margin. To do this, take the following value from this table. 2.5 kV. Mm. Thus, the calculation of the cable cross section by the power of the water heater is over.
Keep in mind that in a series of recommended sections for aluminum cable you need to choose higher indicators than for copper conductors, since their throughput is much lower. In general, if when calculating the maximum load for copper, you will get a number of 2.5 square meters.Mm, then for aluminum, a section of 4 kV should be used.Mm. Etc.
What cable is needed to connect a washing machine?
In stores you can find cables with a section of 0.75; one; 1.5; 2.5; 4; 6 mm2 and. T. D. For a 2500 W washing machine, we select a copper cable with a cross.Section of 2.5 mm2.
- Mount a socket at a distance of 50-80 cm from the floor and water heater.
- It is necessary to draw a three.Wire cable made of copper from the shield to the outlet
- Disconnect the electricity and connect the wires to the outlet
- Connect the Earth’s cable to the bus on the shield.
Connection of the boiler to the water supply
There is at least one input for cold water in the boiler, and one conclusion for hot water. Connect the boiler to the water supply according to a special scheme.
I will pay attention to the fact that we are considering the installation and connection of the accumulative rather than a running water heater. The accumulative water heater, it is also a boiler, is installed stationary, with the eyeliner of the “correct” pipes of the water supply, and not flexible, temporary hoses.In the photo wiring the water supply is made by pipes made of stitched polyethylene. It is possible to wrap with metal.Plastic pipes, copper steel.
The general principle of connecting the boiler to the water supply
Water enters a boiler from a separate line of a cold water supply during a collector wiring or from a tee of trigeminal wiring. In the boiler, the water is heated and supplied to the input of the hot water supply system of the common water intake assembly of the apartment.
- To turn off the boiler, locking taps are installed from the water supply (in the figure of the ball of ball 7).
- To clean the incoming water, a coarse mechanical cleaning filter (5 μm grid) is installed.
- For emergency or technical drain (when cleaning the boiler) water from the boiler from the side of cold water, drainage is made with a separate locking taps (7b).
- From the hot water, the ball of the ball (7a) is also put to create the necessary drainage of water from the boiler in a boiler. That is, if there is no crane (7a) from the hot side, then when opening the crane (7b), the water descent will not occur from the cold side.
- To protect the cold water supply from emergency receipt (at excess pressure of more than 7 atmospheres, in a boiler) hot water from the boiler, a boiler security systems are installed on the side of cold input. Boiler security system has their drainage drainage in the sewer.
Note: The design of the boiler can be provided with a factory discharge for draining water from the boiler. In this case, the drainage with the tap on the side of the cold water does not need to be placed.
You can also not put the spherical crane (7) on hot water, if it is already installed at the introduction of hot water going from the boiler to the apartment water.
Important! With a large pressure in the water supply system of the apartment (more than 6 atmospheres), to enter the water into the boiler, after the water treatment filter, you need to install a pressure gearbox. If the pressure gearbox has already been installed in your apartment water intake node do not need to duplicate them.
Calculation of the cable section according to the table
As mentioned earlier, the cable selection table and wires are used for convenience when calculating when connecting and installing household electrical appliances. Working with her is much more convenient and easier than with complex formulas.
To begin with, we note that a parameter that has a direct impact on the selection of the cable cross section of the load: its type, that is, it is necessary to take into account the resistance of the conductor. It is known that in various metals it can have different values: for example, representatives of the group of noble metals have the lowest resistance indicator. However, the production of an electric cable made of gold or platinum is an unacceptable luxury, so that copper and aluminum conductors are most often used to ensure power supply.
In our case, we will just consider tables for copper and aluminum cables in rubber or plastic braids used in household electrical networks.
In the table below, the cable cross section is calculated by current or power. Interconnected parameters. It is easy to work with such tables. The only feature that must be taken into account when determining the desired value: power or current indicators must be rounded towards increased.
Calculation of the cable section by power
Here is a simple example, explaining how the correct selection of the cable of power for the water heater can be carried out if this indicator is 5 kW.
EPH Combi Pack 4. How to wire. Central Heating Controls
From the table we should look at its value for 5.7 kW. The section of copper conductive core for the wire in this case will be 2.0 kV.Mm. But, since this value is recommended. Then it is best to take a cable with a margin. To do this, take the following value from this table. 2.5 kV. Mm. Thus, the calculation of the cable cross section by the power of the water heater is over.
Keep in mind that in a series of recommended sections for aluminum cable you need to choose higher indicators than for copper conductors, since their throughput is much lower. In general, if when calculating the maximum load for copper, you will get a number of 2.5 square meters.Mm, then for aluminum, a section of 4 kV should be used.Mm. Etc.
Calculation of the cable crossing on current
Calculation of the cable crossing on current can also be made using a table in which the current values of the current of the most commonly used household appliances. In addition, the figures you are interested in can be found from technical documentation or labels available on this product.
As a rule, most electricians in order to choose the cable section very often take the correspondence of each 1 sq.Mm. Sections 10a, one such method gives only indicative indications and is mainly suitable only for a cable with a cross section of less than 6 kV.Mm.
In our case, the calculation will also be more and less correct with the water heater, since the current 23A corresponds to the power of 5 kW, which means that the cable cross section will be 2.3 kV.Mm, which is not much smaller than a cross section calculated by the power of the device at 2.5 square meters.Mm, especially since we are a value with a significant margin.
It remains to add to the above that when laying electrical communications, it is always better to play it safe and use a larger cable. So you will be insured against possible problems and troubles in the future.
How to choose a wire SIP. Correct selection of a self.Supporting isolated wire
Self.Supporting wires. The optimal solution for networks with both high and low voltage.
The popularity of this type of cable is associated with the simplicity of their installation, convenience and safety of operation and the minimum number of interruptions in the supply of electricity due to emergency situations.
Before choosing a SIP brand cable, you should decide for what purposes it is necessary and in what conditions will be operated.
What types of wires exist
SIP.1 and SIP.2 are used mainly for trunk power transmission lines or their branches having a voltage of 0.6-1 kV;
SIP. 3 is also used for air highways, but designed for much higher loads. In 10. 35 kV;
SIP. 4 does not have load.Bearing veins, is laid mainly on the walls of buildings and structures, and the main sphere of its use is branches from the highways for bringing electricity to the end consumers.
How to choose a section?
The wire section should match the power of the connected load as much as possible. Too thin wires will have a higher resistance, respectively, to heat up, which leads to significant energy losses during transmission, and can also be a reason for the destruction of insulation, short circuits and even fire.
How to choose the right one? The regulatory documents and tables with indications of voltage and current strength for different types of SIP will help to choose a cable with the characteristics necessary for the consumer.
A key characteristic for choosing a wire is the current force that can pass through it.
For different sections, this indicator is different:
- 16 mm2. 100 a;
- 25 mm2. 130 A;
- 35 mm2. 160 a;
- 50 mm2. 195 a;
- 70 mm2. 240 A;
- 95 mm2. 300 A;
- 120 mm2. 340 A;
- 150 mm2. 380 A;
- 185 mm2. 436 a;
- 240 mm2. 515 A;
In proportion to the increase in the cross.Sectional area, the maximum permissible current strength also changes, on the load from which this wire is designed. In addition, wires of different sections withstand different intensity and duration of heating during operation.
If the task is to bring electricity to the house using SIP, it is important to choose the right option correctly. Typically, wires with a minimum section of 16 mm2 are more than enough
A smaller cable is simply not produced, but more for domestic energy consumption and no need.
There are no significant overloads in the standard household power supply network, and the ambient temperature does not go beyond. 50-60 degrees.
The choice of wire isolation
In addition to the characteristics of conductive and supporting veins, it is worth paying attention to the isolation of wires, more precisely to the material of its manufacture. For regions with increased intensity of ultraviolet radiation, insulation from light stabilized polyethylene is recommended
In the risks of significant external heating during operation, it is worth giving preference to non.Combustible insulation. If significant sharp temperature changes are possible, there is a risk of snow sticking or icing of wires, then in such conditions the most durable and regularly work will be wires with thermoplastic insulation
For regions with increased intensity of ultraviolet radiation, insulation from light stabilized polyethylene is recommended. In the risks of significant external heating during operation, it is worth giving preference to non.Combustible insulation. If significant sharp temperature changes are possible, there is a risk of snow sticking or icing of wires, then in such conditions the most durable and regularly work will be wires with thermoplastic insulation.
When operating in high humidity conditions, the use of sealed wires is preferable.
Production and sale
There are a lot of cable manufacturers, and only to the consumer to decide which wire to choose specifically from all varieties. As for the quality, it cannot be said that one of the large domestic or foreign manufacturers is significantly higher or lower in this indicator.
All requirements for SIP wires are presented in the appropriate GOST, and if the products of a particular enterprise does not correspond to it, it simply will not get to the market.
Directly, the manufacturer mainly carries out wholesale sales of the cable, for small volumes you will have to resort to the services of dealers or intermediaries. And decent companies are always ready to provide documentation confirming their cooperation with a particular manufacturer, as well as indicating the quality of the goods.
