拟用于爆炸性气体环境中的电气设备，其危险来自可燃性粉尘。如果电气设备在外表面最大粉尘层厚度为5毫米的外壳内安全运行，则视为可接受。交叉引用:BS 31*BS 4121*BS 4568:Part 1*BS 4568:Part 2*BS 4999:Part 101*BS 5345:Part 1*BS 5345:Part 2*BS 5501:Part 1*BS 5501:Part 2*BS 5501:Part 3*BS 5501:Part 4*BS 5501:Part 5*BS 5501:Part 6*BS 5501:Part 7*BS 5501:Part 8*BS 5501:Part 9*BS 5958: 第2部分*BS 6069:第2部分*BS 6121:第1部分*BS 6207*BS 6467:第1部分*BS 6467:第2部分*BS 6480*BS 6651*BS 6656*BS 6941*BS 7361*BS 7430*IP 5X*IP 6X*IP 54*IEC 79:第15部分*IEE电气安装法规*82/24413 DC*BEMA/AEMT防爆设备维修实施规程*

Electrical apparatus intended for use in explosive gas atmospheres under conditions where the hazard will be from combustible dust. Electrical apparatus is considered acceptable if it operates safely in an enclosure with a maximum dust layer thickness of five millimetres on its external surface.Cross References:BS 31*BS 4121*BS 4568:Part 1*BS 4568:Part 2*BS 4999:Part 101*BS 5345:Part 1*BS 5345:Part 2*BS 5501:Part 1*BS 5501:Part 2*BS 5501:Part 3*BS 5501:Part 4*BS 5501:Part 5*BS 5501:Part 6*BS 5501:Part 7*BS 5501:Part 8*BS 5501:Part 9*BS 5958:Part 2*BS 6069:Part 2*BS 6121:Part 1*BS 6207*BS 6467:Part 1*BS 6467:Part 2*BS 6480*BS 6651*BS 6656*BS 6941*BS 7361*BS 7430*IP 5X*IP 6X*IP 54*IEC 79:Part 15*IEE Regulations for Electrical Installations*82/24413 DC*BEAMA/AEMT Code of Practice for Repair of Ex apparatus*