1. The distribution box should be installed in a safe, dry and easy-to-operate place. When installing the distribution box, if there is no design requirement, it is generally concealed that the bottom edge is 1.5 meters away from the ground, and the bottom edge of the lighting distribution board is not less than 1.8m meters away from the ground. The height of the distribution box and panel installed side by side should be consistent, and the allowable deviation of the distribution box and panel installed in the same place should not be greater than 5 mm. 。
2. Wooden bricks and iron pieces required for installing the distribution box shall be embedded, and the surface-mounted distribution box shall be fixed with metal expansion bolts.
3. All iron distribution boxes shall be rinsed with antirust paint, and then with grey paint. All kinds of embedded iron pieces shall be brushed with antirust paint, and the grounding shall be obvious and reliable. When the wires are led out of the panel, the line holes of the panel should be smooth and burr-free, and the metal panel should be equipped with an insulating protective sleeve.
4. There should be obvious and reliable PE protective ground wire (PE wire is braided soft bare copper wire) for the iron disk with appliances and the metal shell with appliances in the distribution box, but the PE protective ground wire is not allowed to be connected in series by box or box.
5, distribution box wiring should be neatly arranged, and tied into a bundle, moving parts should be fixed; The lead-out and lead-in wires on the disk surface should be left with appropriate allowance for easy maintenance;
6, wire stripping place should not damage the wire core after the wire core is too long, wire crimping is firm and reliable; After multi-strand wires are soldered and crimped, wire crimping terminals should be installed. If it is necessary to punch a hole and press it with top wire, the multi-strand wire should be rinsed with tin and then pressed, and the number of conductor strands should not be reduced.
7. All kinds of knife switches and automatic switches installed on the disk surface of the distribution box should not be charged (except in special circumstances) when they are in the open circuit state.
8, vertically installed electrical appliances such as knife switches and fuses are connected to the power supply at the upper end and the load at the lower end. The left side (facing the disk) of the horizontal loader is connected with power supply and the right side is connected with load.
9. The power indicator light on the distribution box should be connected to the outside of the main switch, and a separate fuse (power supply side) should be installed. The position of the disk brake corresponds to the branch road, and a card frame should be installed under it to indicate the road type and capacity.