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High Voltage Cable Pits and Conduit Trenching

14 November 2017

When it comes to planning high voltage cable pits, safe installation practices must be maintained. Remember this: high voltage lines carry dangerous electrical currents, which is why these cables are heavily armoured. Likewise, the conduit trenching services that route these buried electrical lines relies on a shielding methodology. Distance is the first defence here, with the cable pits using a depth of cover table to lay the cables deep.

Depth of Cover Considerations

On planning high-voltage cable pits, a whole chapter of codes and regulations controls the excavation work. Cable tracing equipment marks existing utility lines, backhoe diggers excavate the trench, and special conduit trenching structures are built below ground. The goal is to enforce a suitably sound safety zone, one that protects the high-voltage infrastructure as it forms a grid around the city. Jointing pits, access points, and carefully selected electrical contractors are a major part of this infrastructural service, but there’s more to consider, such as the obstructions above.

Intelligently Accounting for Obstructions

Expert technical services use every resource at hand. In conduit trenching, the electrical distribution grid follows local highways, then it splits as transformers step down the power. Local substations further manage the high-voltage circuits while providing an oil-filled switching facility. Then there’s bridges and storm drainage systems to navigate, plus the topography of the land. Simply put, infrastructural designs are three-dimensional assets, ones that are formed by overlaying tiers. High voltage cable pits progress without issue when full knowledge of these layers is assured.

Calling All Conduit Trenching Services

When we step back from the project for a moment, we see just how much multidisciplinary labour is required. Sometimes the trenches require special approval papers, as bestowed by a local council. On the flip side of the project requirements, there are times when the trenches can’t be opened. At this point, out of the box thinking calls in a trenchless service, an engineering company who can use a directional boring rig to dig the underground tunnels without stripping away the ground above.

Trenchless digging or obstruction solving strategy, the coordinating force behind these proliferating contractors should always be a technical services agency. That agency gets the permits, communicates with the contractors, and looks deep below the ground so that the electrical grid work receives expert attention. Frankly, conduit trenching work may begin with cable tracing and depth planning, but the project quickly spreads to include a hundred other engineering disciplines. Whether the job requires an electrical contractor or an excavation expert, a coordinating service should be in place as a project management asset, especially when high-voltage lines require laying.

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