【Daily Question No. 17】April 17, 2018

2018-04-17View Original

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In explosive gas environments, when flammable materials are lighter than air, electrical circuits should preferably (　). 　　 A. Install at a higher elevation or directly buried. 　　 B. Install at a lower elevation or in a cable trench. 　　 C. Install in a cable trench; the trench should be filled with sand, and drainage facilities should be provided. 　　 D. Install along the interior walls of the building. Summary of daily questions for B2018 Certified Electrical Engineers

Reply #22018-04-17

B. Lay at a lower level or in a cable trench

Reply #32018-04-17

　 B. Lay at a lower level or in a cable trench

Reply #42018-04-17

A. Lay at a higher position or bury directly underground

Reply #52018-04-17

B. Lay at a lower level or in a cable trench

Reply #62018-04-17

B. Lay at a lower level or in a cable trench

Reply #72018-04-17

B. Lay at a lower level or in a cable trench

Reply #82018-04-17

B. Lay at a lower level or in a cable trench

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