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[Solved] Diagram of the lightning protection system - correctness assessment

sebry 6261 6
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #1 16921390
    sebry
    Level 10  
    Hello colleagues,
    I would like to ask if in your opinion there is a need to make additional horizontal air jumps marked in pink and connections marked in green (combination of stairs, sidewalks and roof hatch) as shown in the attached drawing (single-family house)?
    Diagram of the lightning protection system - correctness assessment
    Diagram of the lightning protection system - correctness assessment
    greetings
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    #2 16921970
    kozi966
    Moderator of Electricians group  
    In my opinion, when the object is classified as class IV LPS (although the specific one from the risk analysis does not have to be included in the lightning protection system, assuming that there are no explosive zones or the like), then with a ball radius of 60m, there is no need to include the "additives" presented lightning protection.
    In my opinion, this is an accessory that may or may not be made. However, I do not know what the designer would say, but in my opinion, leading the air jumps along the ridge of the roof with a simultaneous 30-50 cm high vertical air terminals at the very ends is enough.
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  • #3 16922232
    sebry
    Level 10  
    Hello
    The designers I asked did not give an unambiguous answer, hence the question on the forum (in projects in such situations they resort to general descriptions or do not mention anything or remove such devices from the drawing).
    I think that there would be no such problem if the hatch and roof devices were further away from the air terminal (greater separation distances) - here they are close, so I intuitively think about making such connections, although I do not like the unnecessary introduction of potential on these elements.
    greetings
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    #4 16922286
    kozi966
    Moderator of Electricians group  
    If it is in the project, there is no great discussion here.
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    #5 16922776
    Miniax
    Electrician specialist  
    I do not see any point in covering the "steps" and the manhole with connections to the lightning rod. If the devices do not protrude significantly above the roof level, I would treat it as a standard part of it (same as the tile). The fact that it is metal is not a problem as it is not naturally grounded in any way. In the case of these elements, the use of the phrase "separation distances" is an abuse, because what is supposed to separate from what?
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  • #6 16922945
    sebry
    Level 10  
    Miniax - you are right I have read the assembly instructions - these elements are mounted on roof battens and have no direct connection with natural earth electrodes.
    Do you think that horizontal feints (marked in pink) should be done in this situation or only the blue ones?
  • #7 17428314
    sebry
    Level 10  
    The investor, in consultation with the designer, agreed to make the earth electrode as shown in the attached drawing.
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Topic summary

The discussion revolves around the necessity of additional horizontal air jumps and connections in a lightning protection system for a single-family house. The original poster questions whether these elements, marked in pink and green on the provided diagrams, are required. Responses indicate that if the structure is classified as class IV LPS, the additional connections may not be necessary, especially if the air terminals are adequately positioned. Some participants suggest that if the devices do not significantly protrude above the roof, they can be treated as standard components. The conversation highlights the importance of separation distances and grounding considerations in the design of the lightning protection system.
Summary generated by the language model.
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