Is there any special wire for DC wiring like solar system wiring , Can be used AC wire for DC wiring
I have heard that some people taking about the wire can not be used for DC wiring which used AC wiring
Please advice
If you mean mains wires, then you are creating a dangerous installation. Somebody may get confused and wire you solar panels to mains and cause shock and/or fire.
Use Red and Black wires for DC to prevent confusion and danger.
The main difference between mains and solar cables is higher isolation voltage. Solar cables are typically sheated single wire cables. Special approval for solar cables exist.
Usage of color coded cable is possibly to simplify installation but no required by regulations.
Nobody told you to change the wire for DC. If it's a high voltage solar string, use 600/1000V isolated cable with sufficient mechanical strength and durability.
The main difference between mains and solar cables is higher isolation voltage. Solar cables are typically sheated single wire cables. Special approval for solar cables exist.
Usage of color coded cable is possibly to simplify installation but no required by regulations.