In the 70's, as Saudi began to receive royalty monies literally faster than they could spend them, Saudi went on a building boom.
Contractors poured in from all over the world. Engineers and architects migrated like lemmings. A country noted for sand and rock began to sprout developments like a forest sprouts mushrooms after a rain.
In 1991, this expense was validated, as the "useless" military bases and roads built in the boom years proved critical to the success of Desert Storm.
The only fly in the ointment was that every contractor built to whatever norms he was accustomed to. In Saudi, you can find every form of electrical service known to man ... American, European, British, and Japanese standard systems abound. Even DC systems exist. Some systems are grounded, and some are not. Single phase, two phase, and three phase systems exist.
In short, there's no way to guess what power is in use, without actually measuring it. Even a system that looks like an American system might really be a 100v Japanese network.