Installing low voltage landscape lighting cable inside rigid PVC electrical conduit pipe during new construction projects and even installations into existing landscapes is something we do standard on all of our projects.
Landscape lighting wire in conduit. Instead of placing my low voltage transformers in my yard I installed them in my basement and ran them outside through conduit. Remove the insulation from the cut end of wires. You dont have to place the wire under the deck.
As needed over time. If you want to play it safe go up to 34 or even 1 and youll have enough capacity to run power to a shed subpanel or whatever else you might reasonably need in the future. 142 means that it is 14 gauge wire with two strands in the cable.
The only reason to ever pre run conduit is if you are going to be locking yourself out of an area with a solid surface such as pavers or concrete or if you are intending to place lighting within a solid surface. This is to prevent voltage drop. You need to take reasonable care so that the wire is protected from damage.
Stretch the Existing Wire of Landscape Lighting. Mike is a professional. I hate direct-burial wire and will forever use conduit under anything I cant or dont want to move.
Melt In The Sun. That 12-2 low voltage wiring is nice to work with but has gotten expensive to use. Does low voltage landscape wire need to be in conduit.
A good rule of thumb is to have no more than 8 voltage drop at the end of your wire run. It needs to be fastened so it doesnt get caught on things. Make sure each cut end is 1 inch bare and the internal wires can be easily operated on.

