Questions tagged [lightning]

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Whether the LA copper spike rod needs porcelain insulator when installed on a metal rooftop? [migrated]

I am installing a conventional copper rod on the top of a metal roof top I am concerned whether the roof top and the spike rod base are to be insulated with porcelain insulator? Scenario: When a ...
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2 votes
2 answers
76 views

Use of multiple earthings for single installation

For a home electrical wiring, is it acceptable to have to multiple earth rods on different (reasonably apart from each other) locations? In good practice, to keep earth resistance low, we use multiple ...
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0 answers
33 views

Grid-tied micro-inverters and lightning risk

Consider a roof-top solar generation plant. Usually here, a bunch of panels are connected in series to a "string" inverter. So, DC voltage goes up to hundreds of volts. I gather that this ...
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1 vote
1 answer
112 views

How long TVS diode lifespan?

Do TVS diode have a lifespan? Do TVS diode protect against how many lightning strike during own lifespan? Can ı calculate life expectancy? I don't found any document about this issue
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0 votes
2 answers
63 views

MOV failed due to lighting or OV on power line Feeder control

we have a filed failure of our product which is feeder controller as shown in below image. It installed in metal box. we have tested our feeder stand alone at 15KV surge and it compliance with 15KV. ...
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0 votes
1 answer
128 views

How to get 5 volts from Lightning pinout? [closed]

How to make the Lightning port of iPhone output 5V power?
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0 votes
1 answer
73 views

What surge/lightning protection is needed for an elevated off-grid solar security system?

I have a semi-urban hunting location that I would like to monitor remotely. I have an elevated (~20ft) box blind I am installing off-grid solar system (specs below) in. The purpose is to power a small ...
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0 votes
2 answers
378 views

Do I need to insulate down conductors in a lightning protection system?

When we install seperate down conductors in an external lightning protection system, do we need to fully insulate it or need to insulate in touchable areas? Is there any requirements in IEC 62305 ...
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-1 votes
1 answer
155 views

How does common mode voltage surges couple in wires

From doing some research and with the assistance of a user on this platform, I would like to know if my understanding of this concept is correct. Please note this post is an add-on to this post. A ...
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3 votes
1 answer
107 views

What's the difference between a thousand 0.2W LED's and two-hundred 1W LED's?

1000 x 0.2W = 200W 200 x 1.0W = 200W What's the difference in the light output over a given area, in terms of PAR, PPFD, PPF? I grow plants indoors under LED panels. People in this industry say to use ...
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  • 141
1 vote
4 answers
692 views

Why faulty, old CRT TV produce ozone

I have an old CRT TV which had to be switched ON for half an hour or so for the picture to stop being blurry and be 'viewable'. During this initial warm-up time there was a 'static' like noise coming ...
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1 vote
3 answers
112 views

How do I test grounding/lightning protection?

I manage IT for several clients in Central Florida, where we have quite a lot of lightning (the most in the U.S.). I have one client that has trouble keeping electronic devices alive. We have replaced ...
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1 vote
1 answer
148 views

Will adding a resistive load to a lighting circuit stop my electronic dimmer from leaking current to my LEDs?

I changed my bedroom lights yesterday for 220V 7W dimmable LED lights. My bedroom dimmer is an electronic type (LightwaveRF). In the pitch black, last night, I could see the lights faintly glowing/...
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1 vote
1 answer
122 views

Protecting RPi against lightning and high voltage

I'm making a remote weather station with a Raspberry Pi 4 and a few sensors. Problem 1: the anemometer is held on a iron rod (was already there, can't change), dangerously exposed to lightnings. ...
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3 votes
2 answers
399 views

ESD protection during lightning storms

I'm new to electronics, and I'm currently building my electronics area. Let's say that I have an ESD bench mount drilled into my wooden workbench, and this ESD bench mount is then connected to the &...
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7 votes
6 answers
4k views

Can lightning strike into the phone line damage electronics in the house through the ADSL modem?

I was always wondering about the following: If lightning strikes directly into the phone line outdoors, can the excess power coming from the phone line jump over the switching power supply of the ADSL ...
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3 votes
1 answer
165 views

Protecting circuit input against lightning - how to put all the pieces together?

I am designing a single wire (ground return) telephone for use in our hobby caving expeditions, starting out from a well known and successful design called Michiephone (http://speleonics.com.au/...
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5 votes
3 answers
706 views

The chance of a lightning strike - reduced or increased?

If I connect the receiver and TV body to the earth, does it reduce or increase the chance of lightning strikes the dish antenna?
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1 vote
2 answers
284 views

High Voltage and Low Charge - Analogy (ESD & Lightning)

How can something have high voltage but low charge? Can anyone provide an analogy for this? I was going through the ESD topics and read the ESD events usually have high voltage but have low charge? ...
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10 votes
4 answers
157 views

Why are modern telephone lightning arrestors less prone to (rectification) RFI problems than old ones?

I was reading about telephone lightning arrestors in my ARRL RFI Book (first edition, copyright 1998), in chapter 9 "Telephone RFI" (by Pete Krieger, previously WA8KZH, now K8COM) and on page 9.6, the ...
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1 vote
0 answers
43 views

lightning protection on LAN cables indirect strike crowbar VS isolation

i am using a crowbar lightning protection system we built 10 years back for LAN on our own devices for the mine industry. it works very well. at that time i decided to use TVS bidirectional 18v , GDS ...
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0 votes
2 answers
51 views

Can a Surge Travel on a Residential House's Wiring that is higher than 6kV and 3kA?

IEEE has stated that the highest voltage and amperage that a surge can travel on home wiring is 6kV and 3kA. Anything higher, the wiring would melt. If this is so, how does a surge from direct or ...
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0 votes
0 answers
39 views

Using current divider to see how much current goes inside the plane when lightning strike

I am working on a project that requires me to understand how engineers do current analysis. The aircraft has a metallic body which provides a path for lightning when it strikes but what if there is an ...
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0 votes
1 answer
645 views

I am failing to understand the difference in Impulse Sparkover voltage vs DC Sparkover voltage of GDT

Lets say I want to use a Gas Discharge tube for indirect lightning protection, and I have a tvs diode in parallel with GDT. Since this is indirect lightning and has a fast waveform, should the tvs ...
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0 answers
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How do I calculation to see if Thyristor complies with DO-160G indirect lightning protection

I have been working with TVS diode and found that the capacitance of tvs diode is large; therefore, I will not be able to use tvs diode. Thyristor, on the other hand, has low capacitance for high ...
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1 vote
1 answer
644 views

DO-160 indirect lightning requirement confusion

I am looking at many tvs diode online, and I wanted to know how to calculate to check if it complies with DO-160 indirect lightning surge protection. For DO-160, there are Waveform 3, 4, 5A&B, ...
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0 votes
1 answer
323 views

Lightning Surge Protector that complies with DO-160. Indirect lightning waveform, Gas Discharge tube or MOV in parallel with tvs

Would it be wise to put Gas discharge tube in parallel with tvs diode? OR Would it be better to put MOV in parallel with tvs diode? Also when deciding on tvs diode, how does indirect lightning ...
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1 vote
1 answer
857 views

A TVS for lightning surge protection

A camera will be mounted outside and powered via POE to Aruba 2540 network switch. I don't want indirect lightning surge to travel into the network switch. I don't care if the camera gets destroyed. ...
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  • 65
0 votes
1 answer
198 views

Best sensor to measure light intensity in open room

I am working on a project to understand how robot localization is effected by light levels. I am wanting to build a circuit which can be mounted on a small robot near the camera and can determine lux ...
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0 votes
1 answer
189 views

Supercapacitor based lightning-harvester [closed]

Could lightning discharges be harvested and stored in supercapacitor banks? Could supercapacitors withstand and collect lightning? Lightning usually lasts for about 10 micro seconds and reaches ...
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6 votes
3 answers
962 views

Is it possible to measure lightning discharges as Nikola Tesla? [closed]

Nikola Tesla stated in his patent, Art of Transmitting Electrical Energy Through Natural Medium, that he used sensitive instruments to measure lightning discharges: In the course of certain ...
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0 votes
1 answer
342 views

Lightning protection for TV Antenna

I live in an area with frequent lightning strikes. Occasionally people get killed due to those - specially when strikes enter house through TV antenna cables. My house is quite tall and seems to be ...
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0 votes
1 answer
40 views

Replacing lightning connector with usb-c connector in lightning earphones [closed]

I have a lightning earphones, Sennheiser ambeo smart headset. https://en-us.sennheiser.com/finalstop The cables are yellowing, and I wanted to replace them, also I got tired of using this on my ...
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0 votes
0 answers
361 views

Earthing for Satellite Dish

A friend who is an electrical engineer (heavy current) told me to earth my satellite dish and its fixing pole against lightning, using a thick copper cable (6 sq.mm) and an earth spike. He also said ...
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0 votes
3 answers
392 views

Voltage, inductance & lightning in a length of wire

I initially got the idea after watching the famous Mike Holt video on grounding. https://www.youtube.com/watch?time_continue=138&v=mpgAVE4UwFw Mike warns that longer wires to ground rods can ...
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0 votes
2 answers
427 views

Does a ground strap protect my car from a lightning strike?

I was wondering if the ground strap can also protect the electrical/electronic parts of a car when a lightning strikes it.
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0 votes
1 answer
613 views

Is 3.5mm jack to female Apple Lightning adapter technically possible?

I couldn't find a trustworthy source for whether Apple EarPods are digital or analog, but I'm pretty sure it is digital as most teardowns show a chip on it that might be a DAC. Should this make ...
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0 votes
1 answer
98 views

Lightning protection system [closed]

When I have a lightning protection system installed on a building roof top , what is the best way to bond the electrical equipment on the roof? Is it ok to directly bond it to the down counductor of ...
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1 vote
3 answers
937 views

Can lightning damage electronics via a ground connection?

Often when we think of a lightning transient, the idea is that the lightning strikes a power line and propagates through the hot/neutral or 3 wires of 3-phase system. There is also induced current ...
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0 votes
2 answers
92 views

How does the chassis ground on an automobile protect against lightning

How does the chassis neutralize the excess of electrons from a lightning strike?
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6 votes
1 answer
257 views

Sparks on grounded metal bodies on lighting strikes in the nearby (two miles)

I have a strange phenomenon in our mountain cabin, on the Italian alps: lightning strike on the nearby (not so near: < 2 miles) causes audible / visible sparks on: electric / fire wood water ...
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0 votes
1 answer
78 views

A question about lightning protection for a sensor mounted outdoors

There is an ultrasonic-windsensor which will be mounted on a bridge in winter. Maybe several of them. It seems like for outdoor use this device should be earth grounded(probably through mains earth? ...
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2 votes
2 answers
1k views

Why does lightning hit a plane when it's not grounded?

The title is the question. Is it something to do with batteries on a plane? I’ve tried Google but all the listings are “what happens when lightning hits a plane” So why does it happen I want to know?...
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1 vote
2 answers
10k views

How to make the lightning port of iphone output 5V power? like OTG on android phones [closed]

How to make the lightning port of iPhone output 5V power? How to make the lightning port of iPhone output 5V power? Just like the android phone, if I connect the ID pin to the ground then the phone ...
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0 votes
1 answer
206 views

Question about ESD wristband and lightning

as far as I know all ESD wristband's ground connection has an 1M ohm resistor built in for safety. So what would happen if I am working on lab wearing ESD wristband which is connected to the home ...
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0 votes
1 answer
62 views

Are there disadvantages to this method of testing building wiring after a lightning strike?

A lightning strike can damage wiring in a building. Specifically it can damage the insulation on the conductors, resulting in arcing and fire, either immediately or some time after the strike. I've ...
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5 votes
2 answers
344 views

Identification of a part on a power line's lightning arrester

I recently spotted an arrangement of wires on a lightning arrester on top of a power line. The power line is IIRC a 110 kV, 16.7 Hz, two phase line for railway systems. The lightning arrester is of ...
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0 votes
2 answers
1k views

Automatic cut mains power on a thunderstorm

I am a software engineer with only a basic experience with electric/electronic engineering. I live in a rural area subject to thunderstorms, my house is the end of the line from street poles. It's ...
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  • 101
0 votes
2 answers
475 views

How does a neutral wire add any protection from near-by lightning strike

As an amateur radio operator for 60 years now I have been aware that a major worry vis-a-vis lightning is not so much the very rare "direct hit" that blows up the house, but the far more common "near ...
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2 votes
2 answers
373 views

Lightning protection for underground loudspeaker wires

I am tasked with running a loudspeaker to a remote building. The total run length is around 275 feet, with the outdoor portion being around 165 feet. The cable is Cat5e 24awg unshielded, silicone ...
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