The High Court in CIT vs BSES Yamuna Powers Ltd. case observed that computer accessories and
peripherals such as printers, scanners and server etc. form an integral part of the
computer system and they cannot be used without the computer. Consequently, the High Court held that since they are part of the computer system, they would be eligible for depreciation at the higher rate of 60%. LAN is a computer network that interconnects computers. you can charge 60% rate.
if an AC machine installed in office premises charge dep @ 10 treating it as a furniture items , if it is installed in factory charge dep @ 15%.