So-called dividing line is nodded, it is a bound with this namely, be not this namely those, cannot fumble.
In single-phase circuit, overload of live wire classics became 0 lines, overload of 0 lines classics became front line.
Accordingly, in domestic circuit, the dividing line of 0 lines and front line nods ＂ from beginning to end the ＂ left and right sides in ① electrical outlet two aperture; ② receives a point twice laden. (that is to say, of dividing line dot and electrical wiring, break have nothing to do, with laden, electrical outlet receive a dot to concern. )
Domestic circuit, point to circuit of single-phase power supply namely, namely 101 fire (still have a ground wire of course, discussing) . The job inputs a line (live wire and 0 lines) enter user total breaker, through the line with total derivative breaker, it is laden output line, namely user circuit. Since working input line and laden output line are affirmatory, the attribute of two lines in user circuit (0 lines, front line) already decided, absolutely likely without the 3rd kind.
Argumentation is as follows:
In user circuit (single-phase circuit) in, shunt-wound N load and N socket, concrete analysis is as follows,
⑴ closes loop: In pursueing on, gules is live wire L, green is 0 lines N. To load (the lamp) , live wire is terminative nod at A, 0 lines are terminative nod at B; To socket character, live wire is terminative nod at A, 0 lines are terminative nod at B.
⑵ is in the circuit of open circuit condition: Midway of the front line in pursueing on disconnects, for instance, switch K is bad, cannot close, although electrical wiring C -- A paragraph without report, but it cannot be 0 lines absolutely.
Assume it is 0 lines: If switch K closes, that is to say 0 lines and front line are linked together, not short circuit! Actually otherwise, close when K, after C and D join, by A the dot carries the lamp (laden) be linked together in B dot with 0 lines, circuit receives report to connect, the light is bright! . Do not hold water suppose namely. Because of C of this electrical wiring -- A paragraph remain front line. Manage together, 0 lines disconnect in forked X place, although check electrical wiring C -- B paragraph ＂ of the report that take ＂ , but it is not live wire, remain 0 lines.
The place on put together is narrated, the red line in draft is live wire from beginning to end, green line is 0 lines from beginning to end.
Friendship clew: In single-phase close in loop, 0 lines of ① and front line cannot be linked together directly, otherwise short circuit; 0 lines of ② and front line can be linked together through load only.
Character, the point of view is proper, leave a message please grant instruction.
