Choosing between overhead and underground transmission systems in Canada
Electricity is a significant component of every economy, but it cannot be generated and utilized in one place – it needs to be distributed to the areas as needed. Electrical power can be transmitted using overhead or underground transmission lines.
Choosing between overhead and underground transmission systems is essential as it contributes to the costs, life expectancy, and construction impacts of electricity transmission in Canada. Learning about the differences between the two lines is the best way to make an informed decision when construction planning.
Construction process
Consider the construction process when choosing between overhead and underground transmission systems. Consult a single-source team of utility contractors to determine which system is suitable for your project.
The main difference between these construction processes is the placement of conductors. Overhead transmission lines are installed at a certain distance to hang these conductors above in the air, with support from pylons. On the other hand, underground transmission lines are insulated cables buried underground. A multi-trade contractor specializing in both systems can walk you through the pros and cons of each process.
Cost of service
Since the two systems use different installation methods, the cost varies depending on the labour, time spent, and materials required. Overhead transmission lines are simpler to install, so they are generally less expensive, but an underground transmission line requires special cruises for digging trenches and requires more time, so it can be significantly costlier.
Despite the heavy price tag of installation, underground transmission systems in Canada can be beneficial in the long term as the components are hidden, so it is at a lower risk of damage and requires less maintenance.
Life expectancy
The lifespan of overhead and underground transmission can also play a role in helping you determine which system is a better fit based on the nature of your project. For medium-voltage electricity distribution systems, underground lines have a life expectancy of up to 40 years, whereas overhead lines can last for 50 years.
Although both systems have their benefits and drawbacks, if your primary goal is to invest in a longer-lasting transmission system, consider opting for overhead lines as they may last significantly longer.
Environmental impact
Since overhead lines are exposed, specific environmental attacks, such as lighting and thunderstorms, can cause complications, but underground lines are likely to be safe from environmental exposures as they are enclosed.
It is also important to note that underground lines are not safe from storm damage. Some natural disasters such as earthquakes or hurricanes can still impact the system.
Safety concerns
Underground transmission systems are safer for the public, animals, and the environment because there is no risk of contact with fallen lines. A professional multi-trade contractor can reduce this risk of harm by installing the line carefully with their extensive skill set.
Maintenance requirements
Each overhead system has its own maintenance requirement. Overhead lines require more attention to maintenance, resulting in higher costs. Underground lines, on the other hand, don’t need frequent maintenance.
Overhead and underground lines are both popular transmission systems in Canada. The system best suited for your project can vary depending on many factors, but the key to selecting the right system is consulting a specialized construction team with a high level of expertise.
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