Temporary use of electricityThe internal setting standards of distribution boxes and switch boxes
Inside the distribution box and switch boxTerminals and cablesSettingsWhat are theyRequirements:
1.The electrical installation board of the distribution box must be divided into N-line terminal board and PE line terminal board. The N-wire terminal board must be insulated from the metal electrical installation plate; The PE wire terminal board must be electrically connected with the metal electrical installation plate.
The N-wire in the incoming and outgoing lines must be connected by the N-wire terminal board; The PE wire must be connected via the PE wire terminal board.
2.The metal box of the distribution box, the metal cabinet of the switch box, the metal electrical installation plate and the metal base and shell of the electrical appliance must be electrically connected with the PE wire through the PE wire terminal board, and the metal box door and the metal box must be electrically connected by using braided soft copper wire.
3.The connecting wires in the distribution box and switch box must be insulated with copper core. The insulation colors of L1(a), L2(B) and L3(C) phases are yellow, green and red. The insulation color of the n wire is light blue; The insulation color of PE wire is green and yellow.
4.The electrical appliances (including sockets) in the distribution box and switch box should be installed on the metal or non-wood flame retardant insulated electrical installation plate first, and then they can be fastened in the distribution box and switch box as a whole. The metal electrical installation plate and the metal box should be electrically connected.
ZHANG GongsaidSafety
The above summarizes the internal requirements of the distribution box, the first of which is the mandatory provisions of JGJ-2005.
The three phase lines are also arranged in order, which is distinguished from the spatial arrangement: facing the front of the distribution screen, the view of vertical arrangement: from left to right a, b, c; Horizontally arranged: inside-out a, b, c; Views arranged from top to bottom: A, B, C. The neutral line is: light blue (commonly known as the zero line); The ground wire is: yellow and green.
Judging from the provisions of Article 4, the socket can be installed in the switch box, but the installation socket must be fastened on the electrical installation plate, and shall not be skewed or loosened.