Walk the back lot of a strip center at dusk and you can usually tell within a minute if something’s wrong. Half the parking lot lights are out. The signage on the rear tenants is dim or flickering. Inside, one suite is running on a single working circuit while the others are pulling extension cords from wherever they can. Nobody called it an emergency yet, but it’s heading there.

Somebody cut a corner on depth, and now the whole back half of the property is dark. That’s usually how it goes with underground feeds. The trench looked fine from the surface, the conduit got buried, the dirt went back in, and everyone moved on. Then a landscaper hits it with a stake, or the ground shifts after a heavy Florida rain, and suddenly the building is running on whatever circuits managed to survive.

The situation described in Power Grid Model Input/Output, “power-grid-model-io 1.3.70” reflects a growing pattern across commercial environments where underground service routes are getting more complex and less forgiving of shortcuts. Around Bradenton and Sarasota, we see it all the time on older commercial sites where the original trench was barely deep enough to meet code on paper, never mind real-world wear.

Here’s my honest take. If you’re running primary or secondary feed underground to a commercial building, the depth spec is the floor, not the goal. Sandy soil moves. Parking lots get re-poured. Irrigation crews dig without checking. A feed sitting at minimum depth is a feed waiting to fail.

And when it fails, it’s not a quick fix. You’re locating the break, opening pavement, pulling conductors, sometimes re-routing conduit entirely. Tenants lose power. Refrigeration goes down. Lease agreements start getting reviewed.

Bury it deeper than you think you need to. That’s the whole job.

steelcityelectricfl.com/Underground Electrical Services