本文从短路、过负载和接地故障三个方面详细地分析了电气火灾的原因，并结合有关规范提出了相应的防范措施。
The causes of fire brought about by electricity are analyzed in detail in terms of short-circuit, overload and ground faults and some preventive measures are presented in light of related regulations.
民用建筑物防雷与接地工程在设计与施工过程中一些规范条目往往被忽略或者被错误理解。
In the design and construction of lightening protection and grounding of residential building, some specification items are often overlooked and misunderstood.
计算和实践表明，只要接地极埋设深度适宜，外延接地网表面的跨步电势仍然能够满足专业技术规范的安全要求。
It is indicated that the step potential on the surface of the epitaxial grounding grid meets the specialty standard as long as the depth of burying of the grid is reasonable.
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