Is it safe to use a USB-C plug without a voltage converter in Switzerland?

Hi,

As Limnos already indicated, the voltage should not be a problem with modern Apple power adapters. These, typically, have an input voltage range 100-240 V AC at 50/60 Hz.

Yes, to be on the safe side, before using any kind of electrical equipment at home or elsewhere, it is always good practice to look for a label (or text directly on the device) with information about voltage and frequency.

Apple adapters automatically switch to adjust to different voltages. Hair dryers are not as sophisticated. Typically all you need are plug adapters for the country you are in. I usually take a single plug adapter and then I have a 240V rated multi-outlet strip so I can plug in the various things I have that need charging without needing to buy a plug adapter for each of them (and also because I usually have 3 things and a room may only have one outlet I need to share with my wife). Many things these days can automatically adjust to various voltages but you should take out a magnifying glass and read what is printer on the adapter.

Appliances that need more power, like hair dryers, curling irons, must be used w step down voltage converter

This might have been true 10-15 years ago, but most modern appliances will handle 100-240 Volts and 50/60 Hz with no more than the flip of a switch if not automatically.

My wife's hairdryer and curling iron has a 100 / 220 volt switch. My razor does not have a switch, it automatically works on 100-240 volts.

Now, if your hairdryer says 110 Volts and 60 Hz, then you will need a step down voltage converter on a 220-240 volt wall jack.

Thank you for the report. Yes, the text is often very small and difficult to find (for example, when placed between the pins of an adapter).

>if your hairdryer says 110 Volts and 60 Hz

It gets really interesting if it were a synchronous clock...

:-)