1.Cable tray size 2.conduit size

Question

Accepted Answer

The cable tray size and conduit size are determined based on the electrical load and the number of cables or wires to be installed.

The cable tray size is selected based on the number and size of cables to be installed. It should provide adequate space for cable routing and future expansion.
The conduit size is determined by the number and size of conductors to be installed. It should allow for proper wire pulling and meet the electrical code requirements.
Factors such as voltage drop, cable fill ratio, and accessibility should also be considered when selecting cable tray and conduit sizes.
For example, if the electrical load is high and there are multiple large cables, a larger cable tray and conduit size may be required.
Conversely, if the load is low and there are only a few small cables, smaller sizes may be sufficient.

Accepted Answer

1.total Cable our all dia + 30% extra
2.lighting 25mm pvc conduit 
Sub main 32 mm pvc conduit