The grounding strip (or equalizing bus) is another important element that affects the safety of the electrical installation. The grounding bus connects the parts of the lightning protection system. It is an indispensable component of fire protection. Properly performed grounding provides overvoltage protection - it allows you to minimize switching and lightning overvoltages in the lightning protection system. For the sake of effective protection of buildings and home appliances against damage, and, above all, for the health and life of household members, it is worth considering carefully which earthing strip to choose.
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Which grounding strip is best for the switchgear?
First, a little theory. In electric shock protection, the equipotential bonding is carried out by equalizing busbars. Equalizing connections are the basis for effective protection of electrical installations - not only against overvoltage, but also against electric shock and lightning. There are no significant voltages between the conductive elements, and the electrical installation and its conductive parts are adapted to environmental conditions.
Equalizing rails are divided into main and local (local). The main equipotential bus, also known as the main earth bus, provides an equipotential bond between an external device acting as a lightning conductor (e.g. an earth electrode) and screens, pipes, reinforcement, building structural elements or other foreign conductive parts. Therefore, the main equalizing strip is usually located on the lowest floor of the building, and special low-impedance cables are necessary to make the connections. There is a local equalization bus on the border of subsequent lightning protection installation zones. All earthings from the switchgear meet in the equipotential bus.
The grounding bus is a complementary element of the switchgear. To ensure effective grounding, it is very important to select a strip with appropriate parameters. It should be a product intended for electrical switchboards, made of high-quality materials, durable and reliable, meeting safety standards. When choosing a strip, pay attention to the material, dimensions and height and width of the busbars. Typically, grounding bars for switchboards are made of steel and copper. Copper arches dominate. Steel and copper components have excellent resistance to high temperatures in the event of a short circuit or other emergency situations.
What should you consider when choosing a grounding strip for rail?
When choosing a grounding strip for a rail, you should pay attention to such parameters as:
- materials and coatings,
- mounting method (rail type),
- maximum number of wires,
- number of grounding clamps,
- dimensions (length, width, depth).
The advantages of the grounding strip will be: large contact surface, made of galvanized steel (galvanic or electrolytic galvanizing), resistance to vibration and mechanical damage, and ease of installation.
It is best to consult the choice of grounding strip and other protective elements with an electrician or other specialist who will look at the grounding and electrical installation as a whole and then select the strip for specific conditions. Remember that good grounding protects us and our devices.
Earthing strips in the Onninen wholesaler
At the Onninen electrical wholesaler you will find many reliable, modern solutions in the field of surge protection. We offer grounding strips in various sizes and configurations, tailored to various needs and projects. We only supply components from proven, reputable suppliers, e.g. Eriflex .