I'm thinking of getting a gate opener off aliexpress. The gate is about 30m from nearest mains supply. The motors are 24vdc and the control box looks to have a big coil transformer to take mains down to the 24v. I'm thinking of splitting this transformer into a separate box that I can mount near the mains power supply and then run simple twin 24vdc cable all the way to the control box at the gate.
It's either that or run a mains cable that distance. So I wanted to check if anyone knows of any regulations about concealed cables for 24v. Does it need to be shielded? Double insulated, etc? Or would it be legal to just staple it along a fence or drop into a shallow spade dug trough with no warning tape etc?