Trang b in trong nh kiu h: bao gm cc thit b in khng c bo v hon ton chng tip xc trc tip. Trang b in trong nh kiu kn: bao gm cc thit b c bo v hon ton chng tip xc trc tip. Khi khng c nhng iu kin nu trong cc iu I. Gian hoc ni bi l gian hoc ni c nhiu bi. Gian hoc ni bi c chia thnh gian hoc ni c bi dn in v gian hoc ni c bi khng dn in. Cn c vo mc nguy him do dng in gy ra i vi ngi, cc gian hoc ni t thit b in c chia thnh: 1. Gian hoc ni nguy him l gian hoc ni c mt trong nhng yu t sau: a. Nn, sn nh dn in bng kim loi, t, b tng, ct thp, gch v.
Nhit cao xem iu I. C kh nng ngi tip xc ng thi mt bn l kt cu kim loi ca nh ca hoc thit b cng ngh, my mc v. C cng in trng ln hn mc cho php. Gian hoc ni rt nguy him l gian hoc ni c mt trong nhng yu t sau: a.
Phn I: Quy nh chung Quy phm trang b in Trang 3 b. Mi trng hot tnh ho hc xem iu I. Gian hoc ni t nguy him l gian hoc ni khng thuc hai loi trn. Mc n: Khi xy mi hoc ci to cc cng trnh in cn p dng cc bin php gim ting n, m bo khng vt qu mc cho php theo bng I. Cc bin php gim ting n gm: Bin php k thut: thit k cng nghip, cch ly, c lp ngun n, s dng quy trnh cng ngh c mc n thp, cc thit b in c cng sut m thp. Bin php m hc trong xy dng: dng vt liu cch m hoc tiu m.
Bc x mt tri: Trang thit b in t trong nh c th b qua nh hng ca bc x mt tri. Tuy nhin trong mt s trng hp c bit, thit b v tr c cng bc x chiu vo th cn ch n nhit b mt tng cao. Thit b in t ngoi tri cn c nhng bin php c bit m bo nhit lm vic ca thit b khng vt qu nhit cho php. R kh SF6 Trong gian in c cc thit b cha kh SF6 b tr pha trn hoc mt t, yu cu mt na din tch cc l thng hi phi nm gn mt t.
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