Emergency Switch Box Product MW Engineers design and manufacture the Emergency Switch Box for level crossing applications, providing key-locked switches used to deactivate some or all of the level crossing warning equipment in the event of failure. The Emergency Switch Box is available in two lock arrangements: a 5-lock configuration (part number M10004) and a 3-lock configuration (part number M10005). Both variants are key-locked in the ON position and include two sets of keys, chains and tags as standard. The enclosure is constructed from high quality 316 stainless steel with an engraved inner door, designed to withstand challenging trackside environments.