I have been doing some research on this question. The answer I get most of the time is that this is for safety reasons. That there can be no current in the neutral that didn't come from the live. If anyone has a clear answer, please tell me.
Electronic – Why is it not advisable to fuse the neutral
bad-wiringwiring
Related Topic
- Electronic – Why is there a potential difference between neutral and ground (earth)
- Electrical – How to calculate the neutral wire size of a home (department)
- Electronic – Why an electrician wiring error could make a PC’s USB shield be at 120V when it should be grounded
- Electronic – Is an ungrounded earth wire worse than no earth wire
- Electrical Wiring – Why Aren’t All Grounded Device Chassis Energized if Ground and Neutral Are Bonded at Main Panel?
- AC Circuit – Figuring Out Ground Connections
Best Answer
Figure 1. Unpolarised American (120 V) and European (230 V) mains plugs.
Update:
Note that with the unpolarised plugs the fuse can only be guaranteed to protect against over-current in the device itself. e.g., a motor short-circuit will cause the fuse to blow. With the fuse in the neutral wire a short to earth would not cause high current to flow through the fuse.