Type 4 enclosures are intended for use indoors to protect the enclosed equipment against splashing water, seepage of water, falling or hose directed water,severe external condensation.

• 类型4外壳适用于室内，用来保护壳内设备不受喷洒水的侵蚀，渗水，水瀑或软管道流出的水，以及严重的外部凝结水的页面。