The EN range of Junction Boxes feature a high reliability spring action micro switch for the lid tamper, so now your engineers can confidently connect the tamper when using a junction box; maintaining the security and integrity of the system and indeed the reputation of your company. The Junction Boxes are designed to meet PD6662:2004 +A1 +A2/ BS EN 50131-1:2006 and the environmental testing requirements of EN 50131-2- 2:2008 Class II or III as indicated.