If required to cross sidewalks, dig the trench all the way down to the needed depth on each side, then bore a lateral gap underneath the sidewalk by driving a bit of rigid pipe or conduit horizontally. Then, run the conduit beneath the sidewalk throughout the gap you bored. → https://minitrunking13344.blogtov.com/9766741/a-simple-key-for-self-adhesive-mini-trunking-unveiled