Oman.

240 V · 50 Hz on Type G.

Type GBritish 13 A plug13 A · earthed

British-pattern wiring: Type G sockets as the single standard, at 240 V and 50 Hz. UK plugs work unmodified, continental Europeans need only a shape adapter, and anything rated for 120 V alone needs a converter or a dual-voltage power supply.

The voltage window

A nominal 240 V supply may legitimately sit anywhere between 216 and 264 V (±10%). Dual-voltage gear (marked 100–240 V) shrugs at all of it.

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

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Pack an adapter — Oman runs 240 V 50 Hz on Type G — and your 120 V appliances need to be dual-voltage or transformed, adapter or not.

Type A needs an adapter
Oman's Type G sockets don't take a Type A plug.
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Type B needs an adapter
Oman's Type G sockets don't take a Type B plug.
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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.