Malaysia.

240 V · 50 Hz on Type G, Type A, Type C, Type M.

British-style Type G is the everyday socket, and the IEC lists 240 V at 50 Hz — the top of the 230 V family. Types A, C and the big round-pin M also circulate, mainly on shavers, audio gear and air conditioners. UK, Singapore and Hong Kong plugs work as-is; everyone else should pack a Type G adapter.

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 — Malaysia. Prose is our own.

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Plug straight in — Malaysia runs 240 V 50 Hz on Type G, Type A, Type C, Type M — and your 120 V appliances need to be dual-voltage or transformed, adapter or not.

Type A fits
Seats fine — this plug is unearthed by design.
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Type B needs an adapter
Malaysia's Type G / Type A / Type C / Type M 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.