【매일 주제】【전기판 20161007】
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참여 보상: 2재산.정답에 대한 보상: 9재산. 다음 ( )에 해당하는 접지 배선은, 접지체와 두 곳 이상 연결되어 있어야 합니다. A. 화재 위험이 있는 환경 B. 변전소 C. 비폭발성 가스가 존재하는 환경 D. 소방 제어실 정답: AB
AB、、、、、、、、、、、、
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