爆炸性气体环境用电气设备第15部分:防护型“n”电气设备的结构、试验和标记UL 60079-151范围本部分IEC 60079规定了爆炸性气体环境中使用的防护型“n”的II类电气设备的结构、试验和标记要求。1DV。1.修改第1条第一款，替换如下:本标准规定了在国家电气规范ANSI/NFPA 70规定的I类2区危险（分类）场所使用的具有“n”保护类型的II类电气设备的施工、测试和标记要求。本部分适用于无火花电气设备，也适用于带有产生电弧或火花的零件或电路或具有热表面的电气设备，如果不按照本标准规定的方式进行保护，可能会点燃周围的爆炸性气体环境。 本标准描述了实现这一点的几种不同方法，这些方法可以与IEC 60079-0中描述的其他方法相结合。 1DV。2修改第1条第2款，替换如下:将“部分”替换为“标准”。本部分补充了IEC 60079-0中的一般要求。IEC 60079-0与本部分的关系如表1.1DV所示。3修改第1条第3款，替换如下:将“部分”替换为“标准”。表1——本部分与IEC 60079-01DV的关系。4.表1的修改如下:将表标题中的“部分”替换为“标准”，在最后一列的“Ex nL”之前添加“A”，并删除“b项”。非燃烧性部件仅限于其被证明不具备点火能力的特定电路，因此不能单独评估为符合本标准。 符合本标准并不意味着删除或降低电气设备符合的任何其他标准的要求。本部分补充并可能增强正常工业应用对仪器的要求。如果表明符合其他IEC标准，如电机的IEC 60034和灯具的IEC 60598-2，则证明符合这些标准通常是制造商的责任。1DV。4增加注释4如下:注释4国家电气规范？，（ANSI/NFPA 70？）2008年版仅识别“nA”、“nC”和“nR”保护类型，而不识别“nL”。见35.1.1DV中的注释。5添加1DV。5.1和1DV。5.21DV。5.1美国版本的IEC 60079-15不包括I组电气设备的要求。本文件中包含的I类电气设备的要求在出现的所有情况下均应视为省略。 1DV。5.2如果参考IEC 60079标准，这些标准中的参考要求应适用于任何适用的美国国家差异。

Electrical Apparatus for Explosive Gas Atmospheres - Part 15: Construction, Test and Marking of Type of Protection "n" Electrical ApparatusUL 60079-151 ScopeThis part of IEC 60079 specifies requirements for the construction, testing and marking for Group II electrical apparatus with type of protection, "n" intended for use in explosive gas atmospheres.1DV.1 Modification of Clause 1 first paragraph to replace as follows:This standard specifies requirements for the construction, testing and marking for Group II electrical apparatus with type of protection, "n" intended for use in Class I, Zone 2 hazardous (classified) locations as defined by the National Electrical Code, ANSI/NFPA 70.This part is applicable to non-sparking electrical apparatus and also to electrical apparatus with parts or circuits producing arcs or sparks or having hot surfaces which, if not protected in one of the ways specified in this standard, could be capable of igniting a surrounding explosive gas atmosphere. This standard describes several different methods by which this can be achieved which may be combined with other methods described in IEC 60079-0. 1DV.2 Modification of Clause 1 second paragraph to replace as follows:Replace "part" with "standard".This part supplements the general requirements in IEC 60079-0. The relationship of IEC 60079-0 to this part is as indicated in Table 1.1DV.3 Modification of Clause 1 third paragraph to replace as follows:Replace "part" with "standard". Table 1 - Relationship of this part to IEC 60079-01DV.4 Modifications of Table 1 to replace as follows:Replace "part" with "standard" in Table title, add "A" before "Ex nL" in last column, and delete "item b)".A non-incendive component is limited in use to the particular circuit for which it has been shown to be non-ignition capable and, therefore, cannot be separately assessed as complying with this standard.Compliance with this standard does not imply any removal of, or lowering of the requirements of any other standard with which the electrical apparatus complies.This part supplements, and may enhance, the requirements for apparatus for normal industrial applications. Where compliance with other IEC standards is indicated, such as IEC 60034 for motors and IEC 60598-2 for luminaires, proving compliance to those standards is normally the responsibility of the manufacturer.1DV.4 Addition of Note 4 as follows:Note 4 The National Electrical Code?, (ANSI/NFPA 70?) through the 2008 edition only recognizes types of protection "nA", "nC" and "nR" and not "nL". See note in 35.1.1DV.5 Addition of 1DV.5.1 and 1DV.5.21DV.5.1 The U.S. version of IEC 60079-15 does not include requirements for Group I electrical apparatus. Requirements for Group I electrical apparatus included in this document are to be considered omitted in all instances where they appear.1DV.5.2 Where references are made to IEC 60079 standards, the referenced requirements found in these standards shall apply as modified by any applicable U.S. National Differences.