Sweden.

230 V · 50 Hz on Type F, Type C.

Standard Schuko country: recessed Type F sockets supplying 230 V at 50 Hz, happily accepting both earthed Schuko plugs and two-pin europlugs. Most of continental Europe plugs in without thinking about it; UK, Irish and North American visitors need adapters, and 120 V-only appliances need checking before use.

The voltage window

A nominal 230 V supply may legitimately sit anywhere between 207 and 253 V (±10%). Dual-voltage gear (marked 100–240 V) shrugs at all of it.

Grid facts verified against IEC World Plugs — Sweden. Prose is our own.

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Pack an adapter — Sweden runs 230 V 50 Hz on Type F, Type C — and your 120 V appliances need to be dual-voltage or transformed, adapter or not.

Type A needs an adapter
Sweden's Type F / Type C sockets don't take a Type A plug.
the full story
Type B needs an adapter
Sweden's Type F / Type C sockets don't take a Type B plug.
the full story

Faces drawn to scale from pin dimensions · verdicts are physical fit + voltage math, not safety advice — when in doubt, ask the hardware store, not the internet.