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Lightning strikes....what to know.
Njung'e
#1 Posted : Monday, July 04, 2011 1:45:32 PM
Rank: Elder


Joined: 2/7/2007
Posts: 11,935
Location: Nairobi
Great to see that Muli Kanene and Judy Gichuru tried to give tips on how to avoid lightning strikes. I wish they would have invited an expert to try demystifying lightning. For example, they did not explain why it is important to put your legs together and as I listened I chuckled as a brief thought came over and I was asking my self.Do they believe that lightning targets airports and pinessmile ? Here I go and I’ll start with types of strikes. I am sure the likes of Mukiha will add something and of course I expect to see the red cockerel myth too.smile

Direct hit;
Extremely brief and intense but can deliver upwards of 10 million volts (Compare that with your ordinary outlet socket at 240 volts yet hiyo inakutoa jasho).

Side strike;
You are standing under a tree. The tree gets a direct hit but then the lightning jumps to you since you are a better conductor. How you may ask.70 percent of your body is nothing but salty water…huh!

Contact strike;
Your watch, radio, TV……and worst of all, your mobile phone. Switch the damn gadgets off and keep off any electrical appliances or metal grills up to 30 minutes after the last flash.

Step potential;
Current traveling through the ground goes up your leg, travels through you and then goes down the other leg and back into the ground. You deny the lightning a chance to strike you by putting your legs together or better still standing with one leg like the Maasais are fond of...

Over to Wazuans.
Nothing great was ever achieved without enthusiasm.
Robinhood
#2 Posted : Monday, July 04, 2011 3:17:21 PM
Rank: Elder


Joined: 12/11/2008
Posts: 2,306
Thanks @ Njunge.
Great men are not always wise, neither do the aged understand judgement...
Njung'e
#3 Posted : Monday, July 04, 2011 3:37:02 PM
Rank: Elder


Joined: 2/7/2007
Posts: 11,935
Location: Nairobi
Robinhood wrote:
Thanks @ Njunge.


Karibu na usilesmile ...(Hata utakula nini na hakuna any?Laughing out loudly )
Nothing great was ever achieved without enthusiasm.
Mpenzi
#4 Posted : Monday, July 04, 2011 3:52:40 PM
Rank: Veteran


Joined: 10/17/2008
Posts: 1,234
Njung'e wrote:
Great to see that Muli Kanene and Judy Gichuru tried to give tips on how to avoid lightning strikes. I wish they would have invited an expert to try demystifying lightning. For example, they did not explain why it is important to put your legs together and as I listened I chuckled as a brief thought came over and I was asking my self.Do they believe that lightning targets airports and pinessmile ? Here I go and I’ll start with types of strikes. I am sure the likes of Mukiha will add something and of course I expect to see the red cockerel myth too.smile

Direct hit;
Extremely brief and intense but can deliver upwards of 10 million volts (Compare that with your ordinary outlet socket at 240 volts yet hiyo inakutoa jasho).

Side strike;
You are standing under a tree. The tree gets a direct hit but then the lightning jumps to you since you are a better conductor. How you may ask.70 percent of your body is nothing but salty water…huh!

Contact strike;
Your watch, radio, TV……and worst of all, your mobile phone. Switch the damn gadgets off and keep off any electrical appliances or metal grills up to 30 minutes after the last flash.

Step potential;
Current traveling through the ground goes up your leg, travels through you and then goes down the other leg and back into the ground. You deny the lightning a chance to strike you by putting your legs together or better still standing with one leg like the Maasais are fond of...

Over to Wazuans.


Njung'e, forgive my ignorance of matters elec, but how come lighting doesnt hit elec poles? or they can be struck but coz they are earthed no harm to them?
Njung'e
#5 Posted : Monday, July 04, 2011 4:07:35 PM
Rank: Elder


Joined: 2/7/2007
Posts: 11,935
Location: Nairobi
@Mpenzi,
Lightning likes soft spots (Ni kama mgonjwa na uji).In this case,the wires (Copper or aluminium) are softer than eucalyptus...ama?
Nothing great was ever achieved without enthusiasm.
Mpenzi
#6 Posted : Monday, July 04, 2011 4:09:18 PM
Rank: Veteran


Joined: 10/17/2008
Posts: 1,234
Njung'e wrote:
@Mpenzi,
Lightning likes soft spots (Ni kama mgojwa na uji).In this case,the wires (Copper or aluminium) are softer than eucalyptus...ama?


But what about the poles themselves?
Kirika
#7 Posted : Monday, July 04, 2011 4:13:57 PM
Rank: Member


Joined: 1/26/2011
Posts: 211
Location: Nairobi

Mine are more questions than answers.

1. Is it true that lightining doesnt strike twice in the same spot?

2. Is it true that a red cockrell 'attracts' lightining?

3. If you stood directly under a building that has lightining arresters, would it still hit you?
StatMeister
#8 Posted : Monday, July 04, 2011 4:24:28 PM
Rank: Veteran


Joined: 5/23/2010
Posts: 868
Location: La Islas Galápagos
Mpenzi wrote:
Njung'e wrote:
@Mpenzi,
Lightning likes soft spots (Ni kama mgojwa na uji).In this case,the wires (Copper or aluminium) are softer than eucalyptus...ama?


But what about the poles themselves?


possible but remember the electric cables are earthed and offer a much better conductor
A bad day fishing is better than a good day at work
Njung'e
#9 Posted : Monday, July 04, 2011 4:30:31 PM
Rank: Elder


Joined: 2/7/2007
Posts: 11,935
Location: Nairobi
Kirika wrote:

Mine are more questions than answers.

1. Is it true that lightining doesnt strike twice in the same spot?

2. Is it true that a red cockrell 'attracts' lightining?

3. If you stood directly under a building that has lightining arresters, would it still hit you?


1.Lightning can strike the same spot countless time given the opportunity but in most cases it's targets (trees or humans) are usually long gone the next time round.

2.A red cockerel would have a small chance of attracting lightning if it was made of a good conductor like copper or aluminium,was tall enough and it's standing in the rain....but so would a blue cockerel!smile

3.You can have an arrestor but maybe a piece of it is already in a smelter somewhere in Gikomba.It won't work and therefore you are toast if lightning strikes.Always have the integrity of your arrestor checked by an expert.
Nothing great was ever achieved without enthusiasm.
tassia
#10 Posted : Monday, July 04, 2011 6:45:43 PM
Rank: Member


Joined: 4/25/2011
Posts: 368
Location: Nairobi
@Njung'e,
Thanks for this information. I have a questions. Forgive my ignorance though.

1. If the current is travelling through the ground as you have indicated, would having your shoes on help in any way (of course if they are made of material which is not an electric conductor}?

2. If your house is hit and you are inside but you have your shoes on or are not in contact with any electrical conductor, would you be hit? In the case of flats, would you be more exposed on the ground floor or the top floor?
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