Why can not the neutral line fuse
and the ground is not normal circumstances will be charged state (otherwise FireWire insurance should be action.)
And when the zero line fuse blown after the shell is only in the ground insulation is not good
and directly to the end of the load zero line does not require no insurance, at least two knife knife switch can be installed on the zero line insurance.
In the electrical safety work specification only provisions of the zero line is not allowed to install insurance,
Zero line can not be installed insurance depends on the situation.
