IEC 60079-25:2010包含本质安全电气系统的构造和评估的具体要求，保护类型“I”，旨在全部或部分用于需要使用I、II或III组设备的位置。本标准对IEC 60079-0和本质安全标准IEC 60079-11的通用要求进行了补充和修改。当本标准的要求与IEC 60079-0或IEC 60079-11的要求相冲突时，以本标准的要求为准。本标准补充IEC 60079-11，其要求适用于本质安全电气系统中使用的电气设备。按照本标准设计的II类或III类系统的安装要求在IEC 60079-14.与上一版相比的重大变化是: -范围由第II组扩展至第I、II及III组； -引入保护级别“ic”； -增加了对电缆和多芯电缆的要求； -参考关于本质安全电路的端接的IEC 60079-11； -关于保护等级“ic”、简单设备和多芯电缆故障的扩展和澄清的本质安全系统的评估要求； -引入预定义系统并合并IEC 60079-27中FISCO的系统要求； -增加了对包含集总电感和集总电容的简单本质安全系统的要求； -增加用于测试电缆的电参数的方法； -在系统中使用简单设备的附加信息。

IEC 60079-25:2010 contains the specific requirements for construction and assessment of intrinsically safe electrical systems, type of protection "i", intended for use, as a whole or in part, in locations in which the use of Group I, II or III apparatus is required. This standard supplements and modifies the general requirements of IEC 60079-0 and the intrinsic safety standard IEC 60079-11. Where a requirement of this standard conflicts with a requirement of IEC 60079-0 or IEC 60079-11, the requirement of this standard takes precedence. This standard supplements IEC 60079-11, the requirements of which apply to electrical apparatus used in intrinsically safe electrical systems. The installation requirements of Group II or Group III systems designed in accordance with this standard are specified in IEC 60079-14. The significant changes with respect to the previous edition are:
- extension of the scope from Group II to Groups I, II and III;
- introduction of level of protection "ic";
- addition of requirements for cables and multi-core cables;
- reference to IEC 60079-11 regarding the termination of intrinsically safe circuits;
- requirements for the assessment of an expanded and clarified intrinsically safe system regarding level of protection "ic", simple apparatus and faults in multi-core cables;
- introduction of predefined systems and merging of the system requirements for FISCO from IEC 60079-27;
- addition of requirements for simple intrinsically safe systems containing both lumped inductance and lumped capacitance;
- addition of a method for testing the electrical parameters of cables;
- additional information for the use of simple apparatus in systems.