IEC 60364-4-42:2010适用于有关保护人员、牲畜和财产免受以下影响的措施的电气装置: -热效应、材料燃烧或降解以及电气设备造成的烧伤风险， -火灾危险从电气装置传播到附近由屏障隔开的其他防火隔间的情况下的火焰，以及 -损害电气设备的安全运行，包括安全服务。 第三版取消并取代了2001年出版的第二版，构成了技术修订。与上一版相比的主要变化如下: -范围现在包括在火警危险从电气装置蔓延到附近由屏障隔开的其他防火隔间的情况下，防止所有热效应和火焰。-扩大/修改了与紧急情况下疏散逃生路线相关的要求。 -与加工或储存材料的性质相关的要求已经扩展/修改。 -扩大/修改了与可燃建筑材料相关的要求。 -与火灾传播结构相关的要求略有修改。 -增加了在可能危及贵重物品的地点选择和安装设施的新要求。 -防止过热的保护现在包括空间加热设备。

IEC 60364-4-42:2010 applies to electrical installations with regard to measures for the protection of persons, livestock and property against:
- thermal effects, combustion or degradation of materials, and risk of burns caused by electrical equipment,
- flames in case of a fire hazard being propagated from electrical installations to other fire compartments segregated by barriers which are in the vicinity, and
- the impairment of the safe functioning of electrical equipment including safety services.
This third edition cancels and replaces the second edition, published in 2001, and constitutes a technical revision. The main changes with respect to the previous edition are listed below:
- The scope now includes protection against all thermal effects and flames in case of a fire hazard being propagated from electrical installations to other fire compartments segregated by barriers which are in the vicinity.
- Requirements associated with escape routes for evacuation in an emergency have been expanded/modified.
- Requirements associated with the nature of processed or stored materials have been expanded/modified.
- Requirements associated with combustible constructional materials have been expanded/modified.
- Requirements associated with fire propagating structures have been modified slightly.
- New requirements for the selection and erection of installations in locations which might endanger precious goods have been added.
- Protection against overheating now includes space heating appliances.