PSBL System Junction box ■ Wide temperature range System approval Inside the standard polyester junction box one or several heating circuits are connected to the One cable gland size M25 for the supply voltage is already assembled at the junction box. The enclosure is prepared with threads for heating cable glands size M20. Explosion protection Ex protection type System Certification System Protection class according to EN 60529 Ambient temperature Junction box for one heating circuit: Junction box for 2/3 heating circuits: Polyester, glass fibre reinforce (dependant on the heating circuit length)