【Joint Study*】【Civil Engineering Version 20160115】

Which of the following statements is correct regarding the setup of the power distribution system at construction sites? A. The power distribution system should adopt a three-level distribution approach using distribution cabinets or boxes, sub-distribution boxes, and switch boxes. B. The distance between the sub-distribution box and the switch box shall not exceed 30 m. C. The horizontal distance between the switch box and the fixed electrical equipment it controls should not exceed 3 m

Regarding the setup of the power distribution system at the construction site, which of the following is correct (A B C)? A. The power distribution system should adopt a three-level distribution approach using distribution cabinets or boxes, sub-distribution boxes, and switch boxes. B. The distance between a sub-distribution box and a switch box shall not exceed 30 m. C. The horizontal distance between a switch box and the fixed electrical equipment it controls should not exceed 3 m. D. A single switch box can control a maximum of 2 electrical devices

Regarding the setup of the power distribution system at construction sites, the correct statements are (ABC). A. The power distribution system should adopt a three-level distribution approach using distribution cabinets or main distribution boxes, distribution boxes, and switch boxes. B. The distance between the distribution box and the switch box shall not exceed 30 m. C. The horizontal distance between the switch box and the fixed electrical equipment it controls should not exceed 3 m. D. A single switch box can control a maximum of 2 electrical devices. Reason: 1. The power distribution system should use a three-level distribution structure consisting of distribution cabinets or main distribution boxes, distribution boxes, and switch boxes. 2. The main power distribution box should be located in an area close to the power source, while the sub-distribution boxes should be placed in areas where electrical equipment or loads are concentrated. The distance between a sub-distribution box and a switch box shall not exceed 30 m, and the horizontal distance between a switch box and the fixed electrical equipment it controls should not exceed 3 m. 3. It is strictly prohibited to use the same switch box to directly control 2 or more electrical devices (including sockets). 4. Distribution boxes and switch boxes should be installed properly and firmly. The vertical distance from the center of fixed distribution boxes and switch boxes to the ground should be 1.4–1.6 m. Mobile distribution boxes and switch boxes should be installed on sturdy and stable supports. The vertical distance from its center point to the ground should be 0.8–1.6 m.

Regarding the setup of the power distribution system at construction sites, which of the following statements is correct (A B C)? A. The power distribution system should adopt a three-level distribution approach using distribution cabinets or boxes, sub-distribution boxes, and switch boxes. B. The distance between a sub-distribution box and a switch box shall not exceed 30 m. C. The horizontal distance between a switch box and the fixed electrical equipment it controls should not exceed 3 m. D. A single switch box can control a maximum of 2 electrical devices

Regarding the setup of the power distribution system at construction sites, the correct statements are (ABC). A. The power distribution system should adopt a three-level distribution approach using distribution cabinets or boxes, sub-distribution boxes, and switch boxes. B. The distance between the sub-distribution box and the switch box shall not exceed 30 m. C. The horizontal distance between the switch box and the fixed electrical equipment it controls should not exceed 3 m. D. A single switch box can control a maximum of 2 electrical devices

A, B, C,------------------------------