1 on the wall of the junction box 2 lines, the right is the FireWire 2 - is the new look for a new five holes, the following is the old switch before the 3 - open five holes back more photos
"If the original line on the wall is installed with the switch, it can not be replaced by a socket, because the switch is the two lines are FireWire", it is correct; if the wall of the wire is a 0 line of fire, you can then 1 open 5 Hole receptacle, only 3-hole socket without ground protection, will be more dangerous. You can ask a professional electrician to help you wear a zero line can be resolved. Do not understand the electricity do not get too dangerous, easy to trouble children.
This is a matter of principle, no map is not good to explain, in short, is the key to whether it can constitute a loop, you stand on a wooden stool, the body does not touch the wall and other objects, to touch the wire,
380V three-phase four-wire 1 kilowatt load current is about 1.5A, 20 kilowatts is about 30A, should use 35 square copper wire.
The birds are standing on a phase without any ground or other wires constitute a loop no current flow through the body so nothing if the bird's body such as wings hit or close to two wires on the bad luck is also because people are generally standing on the ground or other support Or on the contact wire to form a complete circuit circuit circuit flow through the heart caused by heart beat is also finished with high-voltage live operation to avoid the power through the body constitutes a conductive circuit on nothing
