Hello
Have a cable calculation, run of 25m mainly on cable ladder externally, approx 2 mtr in cable ducts in to Transformer housing.
Can I ignore the 2 mtr in cable ducts and use method of insulation as cable on ladder tray and increase the ambient temp to 30°C
Basically, when using multiple install methods for a single cable run, what is the maximum length a type of install method can be and not used to calc, which may help reduce cable sizes.
Is this distance stated in the regs
Hope this is clear
Andy