本规范涵盖了船用电气和电子设备外壳的要求。有关施工、通风、冷却和机械保护的详细信息包含在本规范中。本规范还涵盖了一类防爆设备，该类设备将在外壳内包含任何火花或点火，并且由于外壳内电路的正常运行或故障，不允许在周围外部大气中点火。本规范不适用于构成电池等设备组成部分的外壳。

This specification covers requirements for enclosures that house electric and electronic equipment for Naval shipboard use. Details concerning construction, ventilation, cooling, and mechanical protection are included in this specification. This specification also covers that class of explosion proof equipment which will contain any spark or ignition within the enclosure and not permit ignition in the surrounding external atmosphere as a result of normal operation or failure of electrical circuits within the enclosure. This specification is not intended to cover enclosures which form an integral part of equipment such as batteries.