How high are overhead utility lines installed above roads?
Utility lines, whether for power, internet, or phone services, are commonly seen above our heads as we drive down roads. But have you ever wondered exactly how high these lines are installed? The answer isn’t always straightforward—it can vary based on several factors, including local regulations, the type of road, and specific utility company requirements.
Electrical Powerlines
For electrical powerlines, the general rule of thumb is that they are installed at a height of about 15 to 20 feet above the road. This ensures that they are safely above vehicles and pedestrians, minimizing the risk of accidental contact.
However, there are situations where powerlines may be installed higher. For example, on highways or in areas with taller vehicles, powerlines might be placed 25 feet or more above the road to accommodate larger trucks and ensure clearances. In residential or less trafficked areas, the lowest height typically allowed by safety standards is around 14.5 feet, based on guidelines from the National Electrical Safety Code (NESC) in the U.S.
Internet and Phone Lines
When it comes to internet and phone lines, their installation height is typically similar to powerlines. These cables are often placed between 12 and 18 feet above the road, though they are generally a bit lower than electrical powerlines. The reason for this difference is that these lines don’t carry the same high-voltage risks as powerlines and therefore don’t require as much clearance.
Like electrical lines, internet and phone cables are also subject to safety requirements set by local codes, including the NESC in the U.S. While the clearance might be slightly lower, utility providers still ensure that the lines are high enough to avoid any interference with road traffic and pedestrians.
Local Regulations and Environmental Factors
Local codes and specific utility company guidelines often dictate the precise height of utility lines. These regulations can vary depending on road type (urban vs. rural), traffic conditions, and safety concerns specific to the region. In some cases, factors like snow and ice may also influence line height. In regions prone to heavy snowfall, for instance, lines may be installed higher to account for the additional weight and potential sag caused by accumulating ice and snow.
