What is an instrument location layout?
Instrument location layout is a layout which indicates the exact location of instrument/junction box, trench/trays etc.
Trench and duct is the path for primary cable and tray is the path for secondary cables. Tray is either made of metals or FRP (Fiber reinforced plastic).
What is Junction box and Junction box location drawing.
Junction box is an intermediate between instrument and control panel. Junction box is an electrical box which contains terminal blocks. The cables from the instruments come to one side of the terminal block and from the other end it goes to the control panel. As I mentioned in previous post cables from the control panel is called primary cables. Usually multi core cables are used as primary cable. Cables to the instruments are called primary cables. Usually single core cables are used as secondary cable.
|Typical example of a junction box|