For electrical systems to function effectively, a well-designed earthing system is crucial. Earthing refers to creating a low-impedance path for fault current to flow into the ground. Strip earthing is a popular type of earthing system that has been used for many years. However, like any other system, it has its advantages and disadvantages. This blog post will cover everything you should know about strip earthing, including its pros and cons.
Advantages of Strip Earthing
Strip earthing has a low impedance, which makes it highly effective in fault current diversion. By maintaining a low resistance, any fault current that may flow through the electrical system is directed into the earth, ensuring the safety of the users.
Strip earthing is relatively fast and easy to install. Since it involves metallic strips, it is easier to lay out precisely, and various lengths can be used to meet specific site requirements.
Another advantage of strip earthing is that it is cost-effective. Compared to other earthing systems, such as rod earthing, the cost of a strip earthing system is considerably lower. Moreover, strip earthing requires little maintenance, saving you money in the long run.
Galvanized steel strips make strip earthing highly durable and suitable for long-term use. The strips are immune to corrosion, ensuring the earthing system remains in excellent and functional condition.
Disadvantages of Strip Earthing
While strip earthing works well in most conditions, it may not suit certain soil types. For instance, it may not be ideal for areas with rocky terrain or soil that is resistant to moisture.
Site Area Required
Strip earthing requires a relatively large site area for installation. The depth and length of the steel strips depend on the magnitude of the fault current anticipated and the soil conditions around the installation site.
Strip earthing can cause the stray current to flow to other metallic structures, which could lead to undesirable electrolysis reactions and other hazards.
Despite being low-maintenance, strip earthing still requires some upkeep to remain efficient. Over time, the soil around the strips may become dry, reducing the efficiency of the earthing system.
Strip earthing is a widely used earthing system known for its efficiency, durability, and cost-effectiveness. However, everything has pros and cons, and strip earthing is no exception. The advantages of strip earthing include low impedance, easy installation, cost-effectiveness, and durability. On the other hand, its disadvantages include limited applications, large site area requirements, potential stray current flow, and maintenance requirements. It is, therefore, crucial to consider the specific site conditions and system requirements before choosing any earthing system.
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