The power (W) and the maximum load of a given appliance is determined by multiplying the voltage (V) by the current intensity (A). In Spain we use a voltage (V) of 230V in homes, that is, it is a value that remains constant. What varies from an appliance that consumes more, or consumes less, is the current intensity (A).

In smart plugs we can see in the technical specifications what is the maximum load it supports. In the cheapest smart plugs is 10Awhich makes a maximum load of 2300W or 2.3kW, however, in the somewhat more expensive (and better) models this maximum load reaches 16A, which makes a maximum load of 3680W or 3.6kW. Depending on the type of appliance you are going to connect, you should assess the purchase of the 16A model to avoid problems when supplying power.

There are smart plugs that through firmware allow us to automatically turn off the plug in case of exceeding a specific power, this is done in order to protect both the smart plug itself and the appliance that we are going to connect. It is very important to enable this functionality so as not to have any kind of “scares”, since it could perfectly burn out.

There are some electrical appliances that by their nature require a great deal of power to start working. If we connect these appliances to a smart plug, in the long run it could cause us problems because the smart plug is at the limit of its maximum load, or very close to it. That a device supports 16A does not mean that it can work continuously with this level of load, since it is most likely that its temperature will increase a lot because it is not prepared for it.

Next, we explain to you in which appliances you should never use a 10A or 16A smart plug (in the latter case, we have more margin):

What happens if I use a smart plug with these appliances? By not being prepared for it, little by little they will be damaged, if it has high temperatures we can see that the plastic casing can melt, and the differential could even jump due to a short circuit and burn. A smart plug is aimed at very low consumption, although its specifications state that they support up to 3600W.

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