Man electrocuted in Lake Lanier

[brantmacga]

Man electrocuted after jumping into Lake Lanier in Forsyth County

A 24-year-old man is dead after being electrocuted in the waters of Lake Lanier on Thursday.

www.ajc.com

24 yr old died after being electrocuted in Lake Lanier GA on Thursday. No details as to the source yet, but the article says they were able to pull him in after turning off electricity to the dock he jumped from.

I’ve quoted this dock mounted electrical current detector to at least half a dozen people at the lake in my town over the last couple of years but have yet to sell one. Have to wonder if it would’ve saved this guy.

Dock Lifeguard | Home Page

docklifeguard.com

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[Sberry]

Had one here few yrs ago. They were gonna have a big investigation but it went quite quietly.

 

[Buck Parrish]

Those detectors will probably be required by the NEC next cycle. It doesn't matter if they work only that they cost a lot.

 

[Joethemechanic]

Back in the 70's and 80's when I had a boat and lived near the Delaware river, electrical installations at private docks and marinas were downright scary. Like handy boxes and romex kind of scary. I remember one dock with BX held by romex staples

 

[qcroanoke]

Docks and swimming pools. Hard pass......

 

[hillbilly1]

I posted this on another recent thread, I’ve only installed one. They have a bunch of other goodies they want to sell you. In their YouTube video, they make the claim they you need to drive one or two ground rods to get less than 25 ohm’s LOL!

 

[brantmacga]

I posted this on another recent thread, I’ve only installed one. They have a bunch of other goodies they want to sell you. In their YouTube video, they make the claim they you need to drive one or two ground rods to get less than 25 ohm’s LOL!

Were you able to do any testing to confirm the device works? I’ve never installed one, I just found it through a web search when customers started asking about it.


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[winnie]

I'd like to know what exactly the devices measure.

Voltage relative to some external point?

Voltage gradient in the water?

Current in the water?

Do they only respond to 60Hz (ish)? What about DC?

The web info on the devices is pretty sparse.

Jon

 

[junkhound]

I asked nearly the same question(s) in the other thread, no answer.

Impression is outrageous prices for perforated tubes and snake oil pamphlet.
What are the patent numbers, if any?

 

[Joethemechanic]

I'd like to know what exactly the devices measure.

Voltage relative to some external point?

Voltage gradient in the water?

Current in the water?

Do they only respond to 60Hz (ish)? What about DC?

The web info on the devices is pretty sparse.

Jon

Somebody using a telephone magneto to catch fish

But seriously, I was wondering the same thing

 

[junkhound]

here is the patent, somehow took 1/2 hour to find, wonder why the dock lifeguard does not list any patent.

US9959734B1​

​

PS suggestion: drop the egregious price (get it make in CHina) by a factor of twenty and sell 50X more if REALLY interested in safety.

 

[hillbilly1]

Were you able to do any testing to confirm the device works? I’ve never installed one, I just found it through a web search when customers started asking about it.


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They will sell you a tester for a hefty price, I just built my own. Momentary switch, battery, and inverter. (Can’t use dock power because it will trip the gfi.) Couldn’t get the voltage high enough to trip the alarm, but it did show an increase of voltage. The customer said he was going to get his neighbors to install one on their docks, and I would have lots of them to do, but never did. He had a new gangway put in so he wouldn’t have to disconnect the dock in the winter. It was around 50’ long!

 

[hillbilly1]

I'd like to know what exactly the devices measure.

Voltage relative to some external point?

Voltage gradient in the water?

Current in the water?

Do they only respond to 60Hz (ish)? What about DC?

The web info on the devices is pretty sparse.

Jon

Voltage gradient in the water. It has a wire probe you stick in the water under the dock. You can set the alarm point to trip the gfi. Has an audible alarm.

 

[hillbilly1]

You have to register in order to see the installation video.

 

[Joethemechanic]

The one vid said it runs on battery or "110" volts

 

[LarryFine]

What are the patent numbers, if any?

And UL testing.

 

[jim dungar]

The one vid said it runs on battery or "110" volts

So it uses the same slang voltage as many electricians do.

 

[hillbilly1]

Looks like they changed the sensing electrode that goes in the water. The one I installed was much smaller.
A properly bonded dock is actually less safe if the voltage is not originating from a source not from it. Ground fault protection for the dock will not see that current.

 

[ATSman]

I am confused.
Doesn't the code cover this with GFI protected outlets installed near water environments? As I recall the GF current that flows in the water is limited to 5 MA before it trips the circuit. Low enough for people protection. Or are we seeing people dying in spite of this protection?

 

[mtnelect]

My suggestion for everyone ... stay out of the water, salt or fresh. When I go into my pool, I shut off the power.