供電安全評價分為地面供電和井下供電兩大部分：
(1)地面供電系統又分為礦井電源、變電所電力線路保護裝置和電氣試驗、安全管理和電氣工作人員4個部分。
(2)井(jing)(jing)下供電(dian)(dian)系統又(you)分(fen)為供電(dian)(dian)安全、井(jing)(jing)下變(bian)電(dian)(dian)硐室，電(dian)(dian)氣(qi)設備和小型電(dian)(dian)器供電(dian)(dian)電(dian)(dian)纜，操(cao)作、檢修與實驗，制度、圖(tu)紙與記錄，電(dian)(dian)氣(qi)工(gong)作人員(yuan)6個(ge)部分(fen)。