A device used to detect any breach in the insulator, usually made out of rubber or some sort of plastic, in a wire.
It basically checks for any part in the wire that might get you electrocuted.
Check it with a voltmeter or with a voltage detector.
When something is hard wired, it is wired directly to the house wire. No cord. You just install the smoke detector like you would a light fixture or an outlet.
Advantages and disadvantages
Thick copper cable-15mm
yes it does
Detector rails generate redstone energy (for a redstone wire or other contraption) when a minecart is on them. You can make a simple minecart accelerator by placing rails like so: [minecart rail][detector rail][powered rail][powered rail][detector rail][minecart rail]
Sure if there is enough metal like steel rebar
Sure it can, but an Underground Wire Finder is the proper tool to use. More accurate and you can easily follow the wire from point A to point B and it can tell you how deep it is.
Unless there is a lot more detail that has been left out here- absolutely not.
Live wire is not to be touched. or Live wire touch not..haha
When ever there is a potential difference between it and ground.
You connect the fuse to the live wire as it is the one with the potential difference of 220V and in case of short circuit current will blow out here