Go Back   DIY Chatroom Home Improvement Forum > DIY Repair > General DIY Discussions

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 08-27-2010, 01:59 PM   #1
Metalman
 
Join Date: Jun 2010
Location: rural suburban upstate NY
Posts: 17
Rewards Points: 0
Share |
Default

Electrified rain gutter


Just something I'd like to pass on. I once got a jolt from a friend's gutter downspout. We put a meter on it and got 90 volts to ground! The contractor that put up the gutters must have driven a nail into the supply to his outdoor spotlights, because after turning off breakers one at a time, we isolated the problem. The contractor said "I've never had this problem before!" but fixed it.

Metalman

dave1123 is offline   Reply With Quote
The Following User Says Thank You to dave1123 For This Useful Post:
Tom Struble (08-27-2010)
Old 08-27-2010, 02:38 PM   #2
Member
 
Join Date: Jul 2008
Location: NW of D.C.
Posts: 5,990
Rewards Points: 0
Default

Electrified rain gutter


Quote:
Originally Posted by dave1123 View Post
got a jolt
90 volts to ground!
This problem has come up before.

Why wasn't it 120 v?
Was the jolt a "tingle" [~1 mA] or "painful" [over 10 mA]?
Were your hands dry?
Were you wearing sneakers or leather shoes?

Thanks for any addt'l info. This will come up again, along with people being shocked in swimming pools.

Yoyizit is offline   Reply With Quote
Old 08-27-2010, 02:49 PM   #3
Member
 
Join Date: Aug 2010
Location: port st lucie, florida
Posts: 444
Rewards Points: 0
Default

Electrified rain gutter


Quote:
Originally Posted by Yoyizit View Post
This problem has come up before.

Why wasn't it 120 v?
Was the jolt a "tingle" [~1 mA] or "painful" [over 10 mA]?
Were your hands dry?
Were you wearing sneakers or leather shoes?

Thanks for any addt'l info. This will come up again, along with people being shocked in swimming pools.
On the voltage the minus side wasn't a good ground . Like a copper rod down 8 feet or more for a good ground. I used to check my ground's on my ham radio antenna's. What i would do is use the plus or the hot leed and measure with a volt meter and see what voltage you get. I live in florida and sometimes a 8 foot wouldn't be enough to get the 120 volt's or what the voltage out of the wall outlet was. Sometime i would have to couple two eight foot copper clad rod's togother and drive them all the way down. Than the voltage was equal to the wall outlet. Probly what he was getting was very little amprage. More like a tingle . Now if you had a meter to measure the ma. That would have told you what the current was. I was in radio and tv repair so i know a little about shock's
del schisler is offline   Reply With Quote
Old 08-27-2010, 02:58 PM   #4
Member
 
Join Date: Jul 2008
Location: NW of D.C.
Posts: 5,990
Rewards Points: 0
Default

Electrified rain gutter


Quote:
Originally Posted by del schisler View Post
I was in radio and tv repair so i know a little about shock's
And with flat screen TVs there is no more CRT 2nd anode to zap you!
Yoyizit is offline   Reply With Quote
Old 08-27-2010, 03:03 PM   #5
Member
 
Join Date: Aug 2010
Location: port st lucie, florida
Posts: 444
Rewards Points: 0
Default

Electrified rain gutter


Quote:
Originally Posted by Yoyizit View Post
And with flat screen TVs there is no more CRT 2nd anode to zap you!
you need a little zap once in a while . Just to let you know what not to do the next time. But those old metel pic tube's used in the rca was the worst ones even when you discharge them . they would still get you when you had to change the tube up in the tuner. Those were the day's Been retired for 20 ysr now But was in tv repair for 40 yrs thanks for the reply del
del schisler is offline   Reply With Quote
Old 08-27-2010, 07:16 PM   #6
Member
 
Join Date: Mar 2010
Location: New York
Posts: 1,743
Rewards Points: 0
Default

Electrified rain gutter


I can remember thinking I wanted to be a TV repairman when I was young.
Even took a class offered in high school. Nowadays people just throw them out and buy new.
Jim F is offline   Reply With Quote
Old 08-27-2010, 07:55 PM   #7
Metalman
 
Join Date: Jun 2010
Location: rural suburban upstate NY
Posts: 17
Rewards Points: 0
Default

Electrified rain gutter


The ground was only a chain link fence nearby. It was just a tingle, until I put my hand on the fence! Then it was enough for me to jerk back and go "What the hell?"
Hey TV guy. Do they use flat screens in radar displays yet? Those CRTs were nasty!!

Metalman
dave1123 is offline   Reply With Quote
Old 08-27-2010, 08:08 PM   #8
Member
 
Join Date: Jul 2008
Location: NW of D.C.
Posts: 5,990
Rewards Points: 0
Default

Electrified rain gutter


Quote:
Originally Posted by dave1123 View Post
it was enough for me to jerk back and go "What the hell?"
Well, ~20 mA is the 'can't let go' threshold so I guess you got around 10 mA.
90 V/0.01 A = 9000 ohms so you probably had dry skin but the voltage might have been lower because you might have been loading down. Maybe you got 30 V @ 10 mA @ 3 K skin/body resistance.
The concrete that the fence posts are sunk in, and the ground, and you, are semiconductors.

Some TVs used 5U4 rectifiers in the power supply and if you shorted the supply the plates would slowly turn bright red. Great fun!

I might still have my RCA Tube Manual. My Knight Kit VTVM still works. . .sort of.

Last edited by Yoyizit; 08-27-2010 at 08:14 PM.
Yoyizit is offline   Reply With Quote
Old 08-27-2010, 09:05 PM   #9
Member
 
Tom Struble's Avatar
 
Join Date: Dec 2008
Location: west milford n.j.
Posts: 2,785
Rewards Points: 0
Default

Electrified rain gutter


ok ok your getting way too excited...drink your milk and go to bed
Tom Struble is offline   Reply With Quote
Old 08-27-2010, 09:12 PM   #10
Member
 
Join Date: Jul 2008
Location: NW of D.C.
Posts: 5,990
Rewards Points: 0
Default

Electrified rain gutter


Quote:
Originally Posted by tomstruble View Post
ok ok your getting way too excited...drink your milk and go to bed
OK, as soon as I get done singing along with my oldies on YouTube.

Or, if you like "Popera"
Yoyizit is offline   Reply With Quote
The Following User Says Thank You to Yoyizit For This Useful Post:
Tom Struble (08-28-2010)
Old 08-27-2010, 09:12 PM   #11
Member
 
Join Date: Aug 2010
Location: port st lucie, florida
Posts: 444
Rewards Points: 0
Default

Electrified rain gutter


Quote:
Originally Posted by Yoyizit View Post
Well, ~20 mA is the 'can't let go' threshold so I guess you got around 10 mA.
90 V/0.01 A = 9000 ohms so you probably had dry skin but the voltage might have been lower because you might have been loading down. Maybe you got 30 V @ 10 mA @ 3 K skin/body resistance.
The concrete that the fence posts are sunk in, and the ground, and you, are semiconductors.

Some TVs used 5U4 rectifiers in the power supply and if you shorted the supply the plates would slowly turn bright red. Great fun!

I might still have my RCA Tube Manual. My Knight Kit VTVM still works. . .sort of.
I had so much fun going on a service call in the wenter when it was zero and than you needed to take the chassis to the work shop Sure was a bunch of fun. Like hell it was Done that for 40 or so yrs. Don't miss it . Retired and now work in the wood shop
del schisler is offline   Reply With Quote
Old 08-27-2010, 09:18 PM   #12
Member
 
Join Date: Jul 2008
Location: NW of D.C.
Posts: 5,990
Rewards Points: 0
Default

Electrified rain gutter


Quote:
Originally Posted by del schisler View Post
now work in the wood shop
In '94 I found out the hard way that hand surgeons in DC charge up to four kilobucks per hour. They don't like sewing things up that they need a microscope to see. Keep the guards on.
For $50K my hand works, sort of. . .

Yoyizit is offline   Reply With Quote
The Following User Says Thank You to Yoyizit For This Useful Post:
Tom Struble (08-28-2010)
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Gutter installation questions Homerepairguy Roofing/Siding 7 03-15-2012 10:22 AM
Rain gets underneath gutter Heimwerker Roofing/Siding 8 12-28-2011 12:59 AM
Rain gutter slopes the wrong way ovahimba Roofing/Siding 2 12-20-2009 03:56 PM
"Frozen" Gutter Leak cougar01 Roofing/Siding 19 02-10-2009 06:07 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.