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The distribution box has three levels of settings: main distribution box, distribution box, and switch box. According to the controlled load distribution box, it is divided into power distribution box, lighting distribution box, and mixed distribution box.

1. The main distribution box is generally located in the power load center. The distribution box is installed in a location where electrical equipment or loads are relatively concentrated, and the distance between it and the switch box generally does not exceed 30 meters.

For ease of use, power distribution boxes and lighting distribution boxes are generally installed separately. If using a hybrid box, the power and lighting circuits are set separately.

3. The general switch box is distributed by the final distribution box.

4. For safety reasons, the distribution box and switch box are equipped with grounding safety maintenance measures during installation. When using them, attention should be paid to the following aspects:

(1) The metal box body, metal electrical device board, and metal bases, casings, etc. inside the distribution box that should not be electrified should be subjected to zero connection maintenance;

(2) The maintenance neutral line should be connected through a terminal block;

(3) The main distribution box is equipped with main barrier switches and branch barrier switches, main fuses and branch fuses, or main active air switches and branch active switches, as well as leakage maintenance devices.

(4) If the leakage maintenance device has overload maintenance and short-circuit maintenance functions, it is generally not equipped with branch fuses or branch switches.

(5) Similar to the main distribution box, the distribution box is also equipped with main and branch block switches, as well as main and branch fuses (or main active air switches and branch active switches).

(6) Generally, there is a leakage maintenance device installed inside the switch box, which is located on the load side of the power barrier switch in the distribution box and on the load side of the power barrier switch in the switch box.

(7) The main distribution box is equipped with a voltmeter, a total ammeter, a total energy meter (kilowatt hour meter), and other external devices; The incoming and outgoing lines in the distribution box and switch box are generally divided into bundles, equipped with protective sleeves and waterproof bends, and led out from the bottom surface of the box to the electrical appliances.

Article source: Jiangmen distribution box http://muaizuowen.com/