Home » Shillafire » Terminal Box (Joint Box) Terminal Box (Joint Box) Joint box is installed between the Monitor and the Main Controller. Categories: Shillafire, Miscellaneous Tags: Fire Monitor, Miscellaneous, Shillafire You may also like… Electric Remote Controlled Monitor Accessories (Explosion-proof) Lever-type Monitor (S-TYPE) Electric Remote Controlled Monitor Lever-type Monitor (Y-TYPE) Electric Remote Controlled Monitor (SL-27NE) Related products Small Size Lever-type Monitor (Fixed) Oscillating Flange Gear-type Monitor (Medium-size) Lever-type Monitor (SL-23WJ SERIES) Single-Inlet Dual-Purpose Portable Ground Monitor 622-1