RT，求解答天线跟楼顶的接地钢筋连接之后，避雷器是放在室外仍然连接接地钢筋更好些？还是离设备近些，与室内插座的地线连更好呢？

那玩意只是一个浪涌保护器，直击雷你就别想防住了。另外我见老外装这个东西是在室外的。你几楼啊这么害怕还要装这玩意的。

@"BI1JNP"#p15308 我想请教一下，如果车载天线是否需要防雷，如果需要那怎么才能避免雷击风险呢？

@"BA7NXV"#p15316 一般来说，高度不高的情况下不用特意考虑防雷，除非处于雷区空旷地。如果有担忧，把天线拆掉就可以了。个人见解，仅供参考。

@"BI1JNP"#p15308 我在11楼顶层，最近准备把一根棒杆天线装上去，在附近范围内算是比较高的位置，周围几个稍高点楼的避雷针，目测保护不到我这目前打算如下图的方式安装，寻思还是装个避雷器好点 [upl-image-preview url=https://storage.hamcq.cn/2024-04-10/1712720900-163253-wechatimg211.jpg]

下雨把馈线扔出去比啥都好使

严格点说你避雷器接的钢筋这个方法不对，这个钢筋属于楼梯避雷，如果楼体被雷劈，天线没有，也会顺着到你家，所以接这里慎重

@"Bi4KKF"#p15339 感谢回复今天又参考了一些通信基站的施工规范，确实是天线的接地和馈线的接地是分开独立的对于居民楼，理论上放室内，接插座地线是更接近这个施工规范的。但担心走室内别真有万一，影响到其它住户，有点纠结😂 [upl-image-preview url=https://storage.hamcq.cn/2024-04-10/1712738085-445632-image.png]

@"BA7NXV"#p15316 我认识的HAM28楼都不防雷，你车台还害怕

@"BI1MMP"#p15346 最安全的方法就是馈线甩窗外，如果连这条件都达不到，才考虑避雷器，目前我见过装避雷器的都是家里有铁塔的大哥，而且老外居多。这玩意主要目的是防止感应雷进机器损坏电子元件，达不到你想要的雷劈上头屁事没有的效果。

@"BG8LUZ"#p15321 好的，感谢您的回答。

Lightning arrester installation issues

BI1MMP

Please provide a solution.

After connecting the antenna to the grounding steel bars on the roof, is it better to place the surge protector outdoors and still connect it to the grounding steel bars, or closer to the equipment and connect it to the indoor outlet's ground wire?

BI1JNP

That device is just a surge protector; it won't protect you from lightning strikes. Also, I saw foreigners installing this thing outdoors. What floor are you on? Why do you need to install something like that if you live there?

BA7NXV

BI1JNP I would like to ask if a car's antenna needs to be protected against lightning, and if so, what measures can be taken to avoid the risk of being struck by lightning.

BI1MMP

BI1JNP I'm on the top floor, 11th floor, and I'm planning to install a long-range antenna there. It's a relatively high location within the surrounding area.

The lightning rods on some of the slightly higher buildings nearby were not sufficient to protect me.

Currently, I plan to install it as shown in the diagram below. I'm considering whether to also add a surge protector.

BG8LUZ

BA7NXV Generally, you don't need to specifically consider lightning protection if the structure is not very tall, unless it's in an open area within a thunderstorm zone. If you have concerns, simply remove the antenna. This is just my personal opinion and should be used as a reference only.

BI1JNP

BA7NXV The HAM28 floors I know don't have lightning protection; are you worried about your car?

BA7NXV

BG8LUZ Okay, thank you for your response.

SuoYuC

Throwing a cable out in the rain is better than anything else.

Bi4KKF

To be precise, the method of connecting steel bars to your surge protector is incorrect. These steel bars are for lightning protection within the building itself. If the building is struck by lightning and doesn't have an antenna, the current will still flow through the steel bars and potentially reach your home. Therefore, it's best to avoid this method.

BI1MMP

Bi4KKF Thank you for your reply.

Today, I also reviewed some construction specifications for communication base stations, and it's clear that the grounding of antennas and feed lines should be separate and independent.

For residential buildings, connecting the grounding wire to a socket inside the unit is theoretically closer to this construction standard.

However, I'm worried about using the stairs and potentially causing a problem for other residents, which makes me hesitate.😂

BI1JNP

BI1MMP The safest method is to run the cable out of the window. If you can't even achieve that, then consider using a lightning arrester. Currently, I have only seen lightning arresters installed in homes where there are large towers nearby, and these tend to be occupied by foreigners. The primary purpose of a lightning arrester is to prevent induction lightning from damaging electronic components. It won't give you the effect of being struck by lightning, as you might expect.

BA7NXV

BI1JNP On the 28th floor, this depends on whether there are other lightning protection devices in the area. As long as the antenna is within the protected zone, there should be no problem. However, if the vehicle's antenna passes through a lightning-prone area, and if the terrain is flat with no other lightning protection devices nearby, then the antenna becomes more dangerous.
Therefore, we still need to consider this.

BI1MMP

BI1JNP This definitely wasn't installed to protect against direct hits from artillery shells. The wire enters the house through the air conditioning vent, and it can't be ejected.😂

Just to offer some reassurance.

BG2EFX

Essentially, you're trying to find a way to...
The lessons I learned from blood... I've already fried two Raspberry Pis.
It's fine if I don't connect to anything.

BI1MMP

BG2EFX This is awkward; after hearing everyone's opinions, it seems like the surge protector was unnecessary.😅

BG2EFX

BI1MMP That surge protector – you still need to connect it independently to ground, and connecting it with a common ground doesn't necessarily reduce risk.
Generally, older HAMs tend to prioritize aesthetics when building their antennas.

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