As far as I can understand the concept of AC, it does not matter which wire is live or neutral as this changes like 100 times per second (implying 50Hz) I believe.
I read the fuse must be connected to the live wire, as close as possible to the AC source, so that the user is less likely to interact with the live wire in case of a fault.
Here I understand you are safe to interact with the Neutral wire. Is that right? Why so? Is it because neutral is connected to ground somewhere in an electrical box in my house? What happens if I plug a copper needle in a wall socket of my house, the neutral hole to be more precise, and I touch it?
To me this does not make sense at all as the live wire becomes the neutral wire the millisecond after, and that loops. Proof being when I plug a load in the wall socket, the load will also work if I plug it the other way around. So it does not matter which is live or neutral. Both are live or neutral. To me the distinction only exists I guess for ease of schematics reading.
Please explain why I am wrong as top results on search engines all say fuse must be on the live wire.
[Addendum] Considering your comments, am I right if I declare the following: there is a good and a bad way to plug a load in a system where the live is fused, even though the load would work in both ways.
Best Answer
Indeed the N wire is connected to GROUND and EARTH at the main electrical panel. So this references one leg of your 120VAC to ground. If you touch it nothing happens. So this protects you from 1/2 of the system.
If you fuse the N side and the fuse blows, there is still HOT in the unit. If the unit shorts to ground and the fuse is on the N, nothing happens. If, however, the fuse is on the H, then it blows if there is a short to either N or GROUND and the power is killed to the unit.