Most "electrisistas" (electricians) in Mexico are self taught, there are some that are professional and know the wiring code, they are expensive in comparison to the neighbor that offers to do the wiring for some money.
As you can see from the diagrams, (sorry they are in PDF and I have no way of transferring them to this post) CFE's responsibility ends at the blade switch with old style fuses or today at the circuit backers of 30 amps, from then on it is the clients responsibility to wire the structure, color code is not followed at all, electric power is expensive and copper wire is also, therefore the installations are as cheap as possible, that is why you find the same color wires at the outlet boxes, they test the circuits with a light bulb a light socket and two wires, most houses have one light in the center of the room and one outlet on a wall, everything else is connected with extensions, why they do not have more fires is a mystery.
Comicion Federal de Electricidad uses white for bonded and ground, and black or green for the live one, even when they provide two wires with 120Vac each and a common the wires will be the same black color or green and white for bonded or ground, CFE does not care what the client does from the meter and disconnect/fuse box into the house or business, CFE employees are forbidden to enter a clients property!
You will not find pedestals as you do in the States, a house hold outlet along the wall is good enough.
For those of you travelling to Mexico, have voltage protector both for high and low, then have a conditioner for all of the electronic gadgets, TV, computer, printer, fax, phone chargers, ETC. and always check the outlets before you connect, just be aware that electricity will kill you, so please be careful.
Que pasen ustedes un buen dia.
navegator