1)  The electrical installation of a shop with supply voltage of 380V, 3-phase is

1)  The electrical installation of a shop with supply voltage of 380V, 3-phase is comprised with the following electrical loads:Single phase load:-            20 nos. of 36W fluorescent light fitting-            4 nos. of air-conditioner unit with full load current of 10A each-            3 nos. of 30A ring circuit using 13A socket outlets-            3 nos. of refrigerator with full load current of 15A eachThree phase load:-     2 nos. of cooking appliances with output power ratings of 8)2kW and 6)3kW respectively.-      2 nos. of 9kW instantaneous type water heaters. (a) Assuming that all of the above electrical loads are balanced across the 3-phase supply, determine the maximum current demand by applying suitable diversity factor as given in Table 7(1) of CoP.(b)   Draw a schematic wiring diagram to show all the final circuit arrangement according to the accepted practice of the Code of Practice for this shop.  Note: NO NEED to show the current rating of the protective devices and cable size of the final circuits in the schematic wiring diagram.