Monterrey power plugs and voltage

Check your plugs before you fly

Monterrey uses Type A and Type B sockets at 120 V / 60 Hz. Pick the country you are travelling from to see exactly what you need.

Monterrey runs on 127 V / 60 Hz with Type A and B sockets. American plugs fit; European and British visitors need an adapter.

Power in Mexico comes mainly from natural gas, oil, hydro, wind. Grid reliability is described as moderate to good.

Good to know: Both 120/240 V split-phase and 127/220 V three-phase are used.

A travel adapter with Type A and Type B on the socket side.
A step-up transformer only if you are bringing 230 V appliances from Europe or Asia.
A device label check: anything marked 100–240 V needs the adapter, nothing else.

Voltage, frequency, socket standard and travel notes for the whole country.

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