(20 17) According to Code for Construction and Acceptance of Electrical Lighting Devices in Buildings (GB506 17-20 10), the following statement is correct: ().

(7) For the lamps installed on the outdoor wall, the height from the bottom of the lamps to the ground should not be less than 2. 5m (A is correct) 1) The lower edge of the cord chandelier with lifter should be 0. After the messenger wire is unfolded, it is 3m higher than the workbench. (d) Error: When the lobby area is large, the evacuation indicator light cannot be installed on the wall, it should be installed under the ceiling, and the height from the ground should not be greater than 2. 5m。 (b) Error (4) The installation of the aviation obstacle sign lamp shall meet the following requirements: (2) When the lamp is installed at the top of the chimney, it shall be installed below the chimney mouth 1.5 ~ 3m and arranged horizontally in a regular triangle.