Czy do gniazdka można podłączyć listwę antyprzepięciową, aby sterować kilkoma sprzętami naraz?

Of course you can, but keep in mind that the total power of all devices can not exceed the authorized power of 3,500 watts. For example, the kettle has a power of about 2,000 watts and the dishwasher is about 1,500 watts. Exact power is given on the enclosure of the device or in its instructions.