do you mean "electronic funds transfer"? because "wiring" is an old school thing that uses Telex machines and and gets processed by people and I would doubt it carries no fee. (It's probably been modernised so that people handle virtual slips of paper, but it very much carries the feel of an "order on a slip of paper" type of transaction and is far from instantaneous.)

I'm genuinely asking, I only know about the US systems where electronic funds transfer is known as ACH which is an automated clearing house, and wiring is called wiring. From the US, I can wire to European banks. I can't ACH.