I'm installing a subpanel in a shed and my buddy has 150 ft of leftover TC-ER Cu Awg 4-3 THHN w/ #8 GND, which he got here: https://www.wireandcableyourway.com/4-3c-thhn-pvc-tray-cable-with-ground
Is there any issue running that from my main panel, thru the attached garage, into my attic, out thru the exterior wall, down the wall into the ground, along the ground, and up into the shed?
I am hoping to run the interior sections without conduit (though I could) and the only conduit during the exterior wall (maybe studs?) and underground sections.
The other points are: 125-150ft from main to sub, 70 amp breaker, 2 grounding rods 6 ft apart, No neutral bonding