Industry Dynamics

1. Check if a "Caution: Electric Shock" safety warning sign is posted on the door of the distribution box.

2. Check if there is sufficient safe passage and working space around the distribution box, and if there are any combustible, flammable, explosive, or corrosive materials piled up nearby.

3. Check if the wire inlet and outlet ports of the distribution box are tightly sealed, and if the gaps are sealed with fire - retardant putty or fire - resistant partitions.

4. Check if the distribution box is equipped with a screen guard baffle made of flame - retardant material. When the distribution box is opened, only the power switch should be visible, and the circuits and wiring points must not be exposed.

5. Check if the metal door and the metal body of the distribution box are grounded and bridged using a braided flexible copper wire. The connection should be made by welding, crimping, or bolt connection; winding or hooking is strictly prohibited to prevent the outer shell of the distribution box from being electrified in case of a fault.

6. Check if the parts where the incoming and outgoing wires are led out of the distribution box are provided with insulating pad protection or are introduced with conduits for 50mm - 80mm to prevent damage to the wire insulation layer.

7. Check if the neutral wire (N wire) and ground wire (PE wire) inside the distribution box are connected to dedicated terminal posts or terminal copper bars.

8. Check if there is an over - load power connection in the distribution box. When the cross - sectional area of the wires is the same, no more than two wires should be connected to the same terminal.

9. Check if arc - isolating plates are installed between the phase wire connection terminals inside the distribution box. This is to prevent arc short - circuit caused when a large current is disconnected and also to prevent phase - to - phase short - circuit caused by the entry of metal foreign objects.

10. Check if there are any sundries placed inside the distribution box and switch box, and if the electrical components are installed on combustible wooden boards.

11. Check if the wiring inside the distribution box is neat and if there is any wire twisting.

12. Check if the labels of the control circuits inside the distribution box are complete and clear.

13. Check if the outdated knife switches with extremely poor safety performance, which have been phased out, are still in use inside the distribution box.

14. The colors of the wires inside the distribution box should be clearly distinguished in accordance with regulations. For the phase wires L1 (A), L2 (B), and L3 (C), the colors should be yellow, green, and red in sequence. The color of the N wire should be light blue, and the color of the PE wire should be green - yellow bicolor.

15. Check if the distribution box and switch box are installed in a dry, well - ventilated, and normal temperature place. If your warehouse is a Class C warehouse, it is not advisable to install the distribution box and switch box indoors. In dusty places, they should be installed in the upwind direction outside the non - explosion - proof area to prevent dust accumulation in the distribution box and switch box, which may leave potential hazards.

16. Check if the main switch distribution box on each floor is equipped with a secondary leakage circuit breaker, and if its action time and current match those of the terminal leakage protection switch.

17. Check if the sockets in the workshop and warehouse have turned black. If they have, it is an extremely dangerous phenomenon because it poses the dual risks of "fire" and "electric shock". Many fires are caused by this problem.