You know all the steps to electrical installation of an electric faucet, these faucets are becoming very popular for heating water. In this article, we will cover the step-by-step installation of an electric faucet in compliance with NBR 5410. We will also cover concepts such as safety in the installation and operation of the electric faucet. Let’s get to know.
What is an Electric Faucet:
Electric faucets emerged to solve problems in the cleaning routine of modern homes, since not all homes have water heating. These installations are made, either for more comfort on cold days or because hot water has a much greater potential to eliminate grease, thus helping the user to carry out the cleaning task in less time, more easily and with less use of Chemicals.
The houses became bolder and more modern, this way the electric faucets also started to present themselves in a bold and modern design, this device also became a very popular decoration item. Applications that were previously only on an industrial scale, kitchens in restaurants, companies and industries are now used in common homes.
Operation of an electric faucet:
Electric faucets are very similar to electric showers, where we use a resistance powered by the network to heat the water. Let’s see the working principle of electric faucets with the details of how they work:
When opening the valve, water enters the electric faucet box, the internal pressure of the water accumulated inside the faucet triggering a diaphragm.
When pressed by water, the diaphragm is displaced by pressing an electrical contact inside the electric faucet. At this moment, the flow of electric current is released, energizing the internal resistance, turning on the electric tap.
The electric current runs through the resistance, causing it to heat up, so the water that is close to this resistance is heated by heat exchange.
At the end of use, the valve is closed, the water loses pressure in the electric faucet box, causing the diaphragm to return to its original condition, interrupting the electrical contact, consequently, interrupting the passage of electrical current.
Installing an Electric Faucet:
The electric faucet is a device with high energy consumption, they can be found on the market at supply voltages of 110V and 220V, as they are electrical devices that involve the use of water in their operation, their electrical installation must be properly carried out to avoid risks such as electric shock and short circuit.
To carry out the installation, the first step is to identify the maximum power of the equipment, so we will be able to calculate the current in the circuit and dimension the cables and protection.
As we are dealing with a purely resistive circuit, there is no need for more complex calculations since the power factor is 1, so we do not consider the impact on the reactive power circuit, thus all energy consumed in the circuit is active power.
Note that the maximum current for the circuit was 25A, so we cannot use a mixed circuit for the faucet, much less use a kitchen outlet for this installation. According to Standard NBR 5410 in item: “220.127.116.11 Every point of use provided for supplying, exclusively or virtually dedicated, equipment with a rated current greater than 10 A must constitute an independent circuit.”
Thus, appliances with electrical power greater than 1200W at 127V and 2200W at 220V need to be powered with an independent circuit for better functioning and safety of the installation. In the case of installing an electric faucet, if the residence does not have the individual circuit, as described above, it will be necessary to install the circuit by an electrician.
Now that we know the current demand of the electric faucet, we need to dimension the best section of the electric cable, so that it can conduct the current without suffering heating or insulation wear. For this, we can use table 36 available
Checking the table presented in column B1- which deals with PVC piping embedded in masonry, in the 2 charged conductors section (since it is a 220V installation), we verify that the 2.5 mm² cable can conduct a maximum current of 24 A, this way the same does not meet our project. We then move on to the next cable, the 4mm² one, it can conduct a maximum current of 32A, this way the cable can meet our electrical installation.
To size the circuit protection circuit breaker we need to use a safety factor, just multiply the rated current of the equipment by 1.15, after the calculation we can find the market circuit breaker closest to the value found ( Never use a circuit breaker lower than the calculated one
We found a current of 29 A, the circuit breaker closest to the current found will be the 32A two-phase circuit breaker. We will use a C curve circuit breaker – DIM to protect our circuit. For Drain Cleaning Click Here
According to the NBR 5410 standard, the circuit must have a protective earthing cable, since the device will be working directly with water, this installation of protective cabling is essential for the safety of people and equipment, preventing the electrical current in case of failure. walk through people or structures. By convection, the earth conductors are green or green with yellow, for our circuit the earth conductor must be a cable of at least 2.5 mm², in order to offer a good protection to the circuit.
The connection of the electric faucet to the installation cables must be carried out through a porcelain connector, it allows heat dissipation and also avoids bad contact in the connection, in this way we will avoid problems such as stiffening of the electrical cables, heating the connection and we will not have insulation of the cable melting and wearing out as it is common in cases of bad contact in the connection.
Using these tips you will be able to perform the correct installation of the electric faucet with an excellent level of safety, providing a safe use of the equipment for users and also a better life for the devices. In case of doubt, always remember to consult a professional.