Installing an electric shower is relatively simple, but there are some details that we must take care of, because with the intention of doing something relatively beautiful or perhaps practical, we can make serious errors in the installation of the shower, which can cause damage to the installation and cause accidents.
When installing the electric shower , the subject of connectors for the shower still usually generates discussion and divides opinions between electricians, so we must take into account that the exchange or installation of an electric shower is not always done by a suitable “professional”, sometimes even made by those who are not from the area, thus increasing the possibilities of errors such as using a plugin the shower.
Is taking a shower prohibited?
Although it seems to some that there are no problems installing the electric shower using plugs, this is an improper practice, but why not use plugs for the shower? It’s forbidden?
In fact, the answer is quite simple! Using an outlet to connect water heating devices to the power grid is prohibited, for those who think this was invented, just consult item 22.214.171.124 of NBR5410.
This item of the standard deals with electric water heating and the text says that the connection of the electric water heater to the point of use must be direct, without using a power outlet
See how simple and uncomplicated the answer is? Hence the second question, why can’t you?
In an electrical installation, the sockets are used to connect electrical appliances on a temporary basis, that is, the appliances can change places, and this does not happen with the shower because it would be a great job, after all it works together with the installation electrical and hydraulic installation.
Another great reason for not using plugs in the shower connection is because of the great electrical power of this equipment! The electric shower is undoubtedly one of the electrical appliances that most consumes electricity in a home. Therefore, using plugs for this connection will certainly cause a great deal of heat at the point of contact.
As the electric showers have a very high power, the electric current of the showers will certainly exceed 20A, as it is the maximum that an outlet will support, which are the Specific Use Outlets (TUE), a current value that is independent of the supply voltage and power of the electric shower.
If we consider a 220V installation and an electric shower that has an electrical power of 5,500W when calculating the shower current using the ohm law we will have an electrical current of 25A, so the outlet will certainly be damaged, placing the installation and especially the person at risk, further aggravating the situation, depending on how long the shower is on.
Several electricians insist that it is easier to install the shower using the plug, but we professionals in the electrical world disagree with this practice. In the market there are already several types of connectors for electrical cables that were manufactured precisely to facilitate the splicing of cables, and look that we are not talking about any connectors, we are talking about the proper connectors for this type of installation, that is, these connectors are manufactured for withstanding the temperatures of that seam point.
In addition to all that I said, have you ever imagined the risks of having a plug point in such a humid place?
The video below is from the Mundo da Elétrica channel, it teaches you to step by step how to install an electric shower, explaining what to do with the grounding cable when you don’t have it in the installation, which connectors to use and what precautions we should have.