3-wire AC outlet / 2-wire cord


Senior Member
Galego/Spanish, Spain
Hi everyone!
I am trying to find out what these 3-wire and 2-wire outlets and cords are in Spanish.
It just appears in the user's guide of a product, like this:

DO NOT Use with 2-wire extension cords or adapters

It must be plugged into a properly grounded 3-wire AC outlet.
(¿toma de corriente alterna con tres cables/con tres contactos?)

I don't think it can be "cable de dos cables", and don't know if "cable doble" has a meaning :(

Any help more than welcome!
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