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Self-fusing liquid electrical tape

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Ed Tanton

Self-fusing liquid electrical tape

I have always-in this order-done the following to a new ground rod
installation: 1) application of an appropriate anticorrosive spray to the
ground rod; 2) attach whatever wires; 3) when all is snug, wrap it all with
self-fusing rubber tape with at least an inch of overlap at each end of the
wrap; 4) wrap all of the fused rubber tape with plastic electrical tape,
adding ~ an inch at each end of the wrap; and finally 5) add a
comprehensive layer of "liquid electrical tape" to the entire tape assembly.
Once this is accomplished, you will have a sealed attachment that will
provide an excellent, long-term connection between the ground rod and the
wire(s) provided by the the fused tape AND the way the liquid electrical
tape will fuse the plastic electrical tape as it dries/cures.
I mention all this as a response to the question about the use of liquid tape.
I did all this working on the ground rods and radials connected under my
HyGain HyTower.

Ed Tanton N4XY
Marietta, GA

Ed Tanton
Marietta, GA

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Phil Kane-2

Re: Self-fusing liquid electrical tape

On 6/3/2020 10:31 PM, Ed Tanton wrote:

> I mention all this as a response to the question about the use of liquid
> tape.
> I did all this working on the ground rods and radials connected under my
> HyGain HyTower.

What do you use to attach the ground wire(s) to the ground rod? Buckeyes?

73 de K2ASP - Phil Kane
Elecraft K2/100 s/n 5402

From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon
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Ed Tanton

Re: Self-fusing liquid electrical tape

I should have mentioned that. I strip 5 or 6 inches of insulation. That was
why I cleaned the top of the ground rod and sprayed it with electrical
lubricant. I used a stainless steel hose clamp to hold the stripped wires
against the ground rod at each end of the stripped wire portions. The next
part is what I wrote about to start with.
Ed Tanton
Marietta, GA

On 6/3/2020 10:31 PM, Ed Tanton wrote:

> I mention all this as a response to the question about the use of liquid
> tape.
> I did all this working on the ground rods and radials connected under my
> HyGain HyTower.

What do you use to attach the ground wire(s) to the ground rod? Buckeyes?

73 de K2ASP - Phil Kane
Elecraft K2/100 s/n 5402

From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon
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Phil Kane-2

Re: Self-fusing liquid electrical tape

On 6/4/2020 8:50 PM, Ed Tanton wrote:

> I should have mentioned that. I strip 5 or 6 inches of insulation. That
> was why I cleaned the top of the ground rod and sprayed it with
> electrical lubricant. I used a stainless steel hose clamp to hold the
> stripped wires against the ground rod at each end of the stripped wire
> portions. The next part is what I wrote about to start with.

Thank you for explaining that. For our commercial and public safety
communication site grounding systems our firm insists on cad-weld at all
exposed and buried connection points but I would suspect that very few
hams, let alone residential or even commercial electricians, would go to
that length. My mentor in that area, the late Tom Croda, who during his
lifetime was the national expert in comm site power and grounding, would
not settle for anything less.

73 de K2ASP - Phil Kane
Elecraft K2/100 s/n 5402

From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon
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Grant Youngman-2

Re: Self-fusing liquid electrical tape

Cad-weld isn’t expensive — $11-15 per weld depending on where you buy the stuff. Typically sold in kits of 6 one-shot crucibles, and available for varying ground wire sizes on 1/2” or 5/8” ground rods.

Grant NQ5T

> On Jun 5, 2020, at 11:17 AM, Phil Kane <[hidden email]> wrote:
>
> On 6/4/2020 8:50 PM, Ed Tanton wrote:
>
>> I should have mentioned that. I strip 5 or 6 inches of insulation. That
>> was why I cleaned the top of the ground rod and sprayed it with
>> electrical lubricant. I used a stainless steel hose clamp to hold the
>> stripped wires against the ground rod at each end of the stripped wire
>> portions. The next part is what I wrote about to start with.
>
> Thank you for explaining that. For our commercial and public safety
> communication site grounding systems our firm insists on cad-weld at all
> exposed and buried connection points but I would suspect that very few
> hams, let alone residential or even commercial electricians, would go to
> that length. My mentor in that area, the late Tom Croda, who during his
> lifetime was the national expert in comm site power and grounding, would
> not settle for anything less.
>
> 73 de K2ASP - Phil Kane
> Elecraft K2/100 s/n 5402
>

Peter W2IRT

Re: Self-fusing liquid electrical tape

My whole ground system is Cadweld bonded. I bought the new style shots and purchased the igniter from Joel and the RF Connection in MD. Couldn't have been happier. And they're fun to fire off, too!

- pjd

-----Original Message-----
From: [hidden email] <[hidden email]> On Behalf Of Grant Youngman
Sent: Friday, June 5, 2020 12:05 PM
To: [hidden email]
Cc: Elecraft Refl <[hidden email]>
Subject: Re: [Elecraft] Self-fusing liquid electrical tape

Cad-weld isn’t expensive — $11-15 per weld depending on where you buy the stuff. Typically sold in kits of 6 one-shot crucibles, and available for varying ground wire sizes on 1/2” or 5/8” ground rods.

Grant NQ5T

> On Jun 5, 2020, at 11:17 AM, Phil Kane <[hidden email]> wrote:
>
> On 6/4/2020 8:50 PM, Ed Tanton wrote:
>
>> I should have mentioned that. I strip 5 or 6 inches of insulation.
>> That was why I cleaned the top of the ground rod and sprayed it with
>> electrical lubricant. I used a stainless steel hose clamp to hold the
>> stripped wires against the ground rod at each end of the stripped
>> wire portions. The next part is what I wrote about to start with.
>
> Thank you for explaining that. For our commercial and public safety
> communication site grounding systems our firm insists on cad-weld at
> all exposed and buried connection points but I would suspect that very
> few hams, let alone residential or even commercial electricians, would
> go to that length. My mentor in that area, the late Tom Croda, who
> during his lifetime was the national expert in comm site power and
> grounding, would not settle for anything less.
>
> 73 de K2ASP - Phil Kane
> Elecraft K2/100 s/n 5402
>

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Lovin' my K3S (S/N 10023)
73, Peter W2IRT

Chris Waldrup-2

Re: Self-fusing liquid electrical tape

In reply to this post by Phil Kane-2

Hi Phil,

I use Erico One Shot cad welds on my workshop grounding system. Everything is tied together with cad welded bare 6 AWG and I have 8 foot ground rods, although I had to drive them in at an angle. Our house is on top of a mountain in TN and soil depth varies from probably 6 ft deep to exposed rock in certain parts of the property. This is probably overkill for QRP but I wanted to do it right like we used to do in broadcast.

Chris
KD4PBJ

> On Jun 5, 2020, at 10:19 AM, Phil Kane <[hidden email]> wrote:
>
> On 6/4/2020 8:50 PM, Ed Tanton wrote:
>
>> I should have mentioned that. I strip 5 or 6 inches of insulation. That
>> was why I cleaned the top of the ground rod and sprayed it with
>> electrical lubricant. I used a stainless steel hose clamp to hold the
>> stripped wires against the ground rod at each end of the stripped wire
>> portions. The next part is what I wrote about to start with.
>
> Thank you for explaining that. For our commercial and public safety
> communication site grounding systems our firm insists on cad-weld at all
> exposed and buried connection points but I would suspect that very few
> hams, let alone residential or even commercial electricians, would go to
> that length. My mentor in that area, the late Tom Croda, who during his
> lifetime was the national expert in comm site power and grounding, would
> not settle for anything less.
>
> 73 de K2ASP - Phil Kane
> Elecraft K2/100 s/n 5402
>
> From a Clearing in the Silicon Forest
> Beaverton (Washington County) Oregon
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

Chris Waldrup-2

Re: Self-fusing liquid electrical tape

I meant to add I couldn't get the shots to fire with the sparking tool I purchased so I ran down to a fireworks store and purchased a box of sparklers. They do a ***fantastic*** job at ignition.
Then when you're done after things cool a few gentle taps with a hammer breaks off the thin ceramic form and you're good to go.

Chris
KD4PBJ

> On Jun 5, 2020, at 12:23 PM, Chris Waldrup <[hidden email]> wrote:
>
> Hi Phil,
>
> I use Erico One Shot cad welds on my workshop grounding system. Everything is tied together with cad welded bare 6 AWG and I have 8 foot ground rods, although I had to drive them in at an angle. Our house is on top of a mountain in TN and soil depth varies from probably 6 ft deep to exposed rock in certain parts of the property. This is probably overkill for QRP but I wanted to do it right like we used to do in broadcast.
>
> Chris
> KD4PBJ
>
>>> On Jun 5, 2020, at 10:19 AM, Phil Kane <[hidden email]> wrote:
>>>
>>> On 6/4/2020 8:50 PM, Ed Tanton wrote:
>>>
>>> I should have mentioned that. I strip 5 or 6 inches of insulation. That
>>> was why I cleaned the top of the ground rod and sprayed it with
>>> electrical lubricant. I used a stainless steel hose clamp to hold the
>>> stripped wires against the ground rod at each end of the stripped wire
>>> portions. The next part is what I wrote about to start with.
>>
>> Thank you for explaining that. For our commercial and public safety
>> communication site grounding systems our firm insists on cad-weld at all
>> exposed and buried connection points but I would suspect that very few
>> hams, let alone residential or even commercial electricians, would go to
>> that length. My mentor in that area, the late Tom Croda, who during his
>> lifetime was the national expert in comm site power and grounding, would
>> not settle for anything less.
>>
>> 73 de K2ASP - Phil Kane
>> Elecraft K2/100 s/n 5402
>>
>> From a Clearing in the Silicon Forest
>> Beaverton (Washington County) Oregon
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]

Phil Kane-2

Re: Self-fusing liquid electrical tape

In reply to this post by Grant Youngman-2

On 6/5/2020 9:05 AM, Grant Youngman wrote:

> Cad-weld isn’t expensive — $11-15 per weld depending on where you buy
> the stuff. Typically sold in kits of 6 one-shot crucibles, and
> available for varying ground wire sizes on 1/2” or 5/8” ground rods.

Agreed, but how many of us would go through that exercise?

73 de K2ASP - Phil Kane
Elecraft K2/100 s/n 5402

From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon
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Art Greenberg

Re: Self-fusing liquid electrical tape

Yeah, maybe I'm one of the exceptions. I just used 20 of them to build a lightning ground system for a new tower install. Easy to use and considerable peace of mind knowing the joints created will last a long time underground.

--
Art Greenberg
WA2LLN
[hidden email]

On Fri, Jun 5, 2020, at 13:32, Phil Kane wrote:

> On 6/5/2020 9:05 AM, Grant Youngman wrote:
>
> > Cad-weld isn’t expensive — $11-15 per weld depending on where you buy
> > the stuff. Typically sold in kits of 6 one-shot crucibles, and
> > available for varying ground wire sizes on 1/2” or 5/8” ground rods.
>
> Agreed, but how many of us would go through that exercise?
>
> 73 de K2ASP - Phil Kane
> Elecraft K2/100 s/n 5402
>
> From a Clearing in the Silicon Forest
> Beaverton (Washington County) Oregon
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

Jim Brown-10

Re: Self-fusing liquid electrical tape

In reply to this post by Phil Kane-2

On 6/5/2020 8:17 AM, Phil Kane wrote:
> For our commercial and public safety
> communication site grounding systems our firm insists on cad-weld at all
> exposed and buried connection points but I would suspect that very few
> hams, let alone residential or even commercial electricians, would go to
> that length.

It was years before I went from mechanical clamps to cadwelds. No
question that it's the way to go. Some are packaged much better than
others. I prefer the ones where the two powders are packaged separately.
NK7Z sells them.

73, Jim K9YC
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Jim Brown-10

Re: Self-fusing liquid electrical tape

In reply to this post by Chris Waldrup-2

On 6/5/2020 10:23 AM, Chris Waldrup wrote:
> This is probably overkill for QRP but I wanted to do it right like we used to do in broadcast.

The primary purpose of grounding bonding has NOTHING to do with radio --
it's for LIGHTNNG PROTECTION!

On 6/5/2020 10:46 AM, Walter Underwood wrote:
> Cad-weld seems a easier than the other approach described. It is more
robust against corrosion, plus it is fun.

Yes, it certainly is fun! I summoned my XYL and the neighbor's kid to
watch. :)

73, Jim K9YC
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donovanf

Re: Self-fusing liquid electrical tape

Hey Jim,

If you think Cad-Welding a ground rod is fun to watch, take a look at
thermite welding of railroad tracks:

www.youtube.com/watch?v=5uxsFglz2ig

73
Frank
W3LPL

----- Original Message -----

From: "Jim Brown" <[hidden email]>
To: [hidden email]
Sent: Friday, June 5, 2020 6:07:22 PM
Subject: Re: [Elecraft] Self-fusing liquid electrical tape

On 6/5/2020 10:23 AM, Chris Waldrup wrote:
> This is probably overkill for QRP but I wanted to do it right like we used to do in broadcast.

The primary purpose of grounding bonding has NOTHING to do with radio --
it's for LIGHTNNG PROTECTION!

On 6/5/2020 10:46 AM, Walter Underwood wrote:
> Cad-weld seems a easier than the other approach described. It is more
robust against corrosion, plus it is fun.

Yes, it certainly is fun! I summoned my XYL and the neighbor's kid to
watch. :)

73, Jim K9YC
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Chris Waldrup-2

Re: Self-fusing liquid electrical tape

In reply to this post by Jim Brown-10

Right sir I understand. I just mean I don't have large towers and big antennas. Just want be protected since we are up high.

Chris

> On Jun 5, 2020, at 1:09 PM, Jim Brown <[hidden email]> wrote:
>
> On 6/5/2020 10:23 AM, Chris Waldrup wrote:
>> This is probably overkill for QRP but I wanted to do it right like we used to do in broadcast.
>
> The primary purpose of grounding bonding has NOTHING to do with radio -- it's for LIGHTNNG PROTECTION!
>
>
> On 6/5/2020 10:46 AM, Walter Underwood wrote:
> > Cad-weld seems a easier than the other approach described. It is more robust against corrosion, plus it is fun.
>
> Yes, it certainly is fun! I summoned my XYL and the neighbor's kid to watch. :)
>
> 73, Jim K9YC
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Message delivered to [hidden email]

Jim Brown-10

Re: Self-fusing liquid electrical tape

In reply to this post by donovanf

Neat!

Jim

On 6/5/2020 11:13 AM, [hidden email] wrote:
> Hey Jim,
>
>
> If you think Cad-Welding a ground rod is fun to watch, take a look at
> thermite welding of railroad tracks:
>
>
> www.youtube.com/watch?v=5uxsFglz2ig

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Bob McGraw - K4TAX

Re: Self-fusing liquid electrical tape

In reply to this post by Phil Kane-2

Anyone that would desire to have a proper and reliable installation for
connecting a conductor to a ground rod. Me for one!

To that end, I've visited many ham stations where it seems there is a
mish mash of equipment connected in a hap hazard manner. I view this
is far from good engineering practice and methods. And then they often
wonder why things don't work or don't work reliably.

73

Bob, K4TAX

On 6/5/2020 12:32 PM, Phil Kane wrote:

Bob McGraw - K4TAX

Re: Self-fusing liquid electrical tape

In reply to this post by Phil Kane-2

Just look at $11.00 per ground rod connection for Cad-Weld as compared
to $1.98 for a mechanical clamp. Which do you think a ham will choose ?

73

Bob, K4TAX

On 6/5/2020 12:46 PM, Walter Underwood wrote:

> Cad-weld seems a easier than the other approach described. It is more robust against corrosion, plus it is fun.
>
> I just don’t see a downside. :-)
>
> wunder
> K6WRU
> Walter Underwood
> CM87wj
> http://observer.wunderwood.org/ (my blog)
>
>> On Jun 5, 2020, at 10:32 AM, Phil Kane <[hidden email]> wrote:
>>
>> On 6/5/2020 9:05 AM, Grant Youngman wrote:
>>
>>> Cad-weld isn’t expensive — $11-15 per weld depending on where you buy
>>> the stuff. Typically sold in kits of 6 one-shot crucibles, and
>>> available for varying ground wire sizes on 1/2” or 5/8” ground rods.
>> Agreed, but how many of us would go through that exercise?
>>
>> 73 de K2ASP - Phil Kane
>> Elecraft K2/100 s/n 5402
>>
>> From a Clearing in the Silicon Forest
>> Beaverton (Washington County) Oregon
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
> ______________________________________________________________
> Elecraft mailing list
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k6dgw

Re: Self-fusing liquid electrical tape

In reply to this post by donovanf

In the mid-60's, on the other side of the planet, we ran missions
putting a transportable TACAN on the air for as long as the JP-4 for the
400 Hz turbine alternators lasted [~10-15 days]. Then, we piled all the
gear on top, several thermite packs on that, and pulled the tapes. It
reduced EVERYTHING to molten slag ... sadly including two brand new
KWM-2A's each time. [:=((((

73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 6/5/2020 11:13 AM, [hidden email] wrote:

> Hey Jim,
>
>
> If you think Cad-Welding a ground rod is fun to watch, take a look at
> thermite welding of railroad tracks:
>
>
> www.youtube.com/watch?v=5uxsFglz2ig
>
>
> 73
> Frank
> W3LPL
>
>

Bob McGraw - K4TAX

Re: Self-fusing liquid electrical tape

In reply to this post by Jim Brown-10

I agree with Jim, K9YC on this. Grounding is for lightning
protection.   To be effective, it should be outside of the
structure/house and be very low resistance.   And all driven grounds
must be bonded back to the AC Mains ground. This is per NEC. Your
equipment, your house, and your life may depend on it being done correctly.

Yes, the Cad-Weld fireworks are indeed impressive.   And when finished
one has a connection that will survive reliably underground for years
and years.   Where as a mechanical connection is only good for a few
years and less if buried. Something about dissimilar metal chemical
reaction.

73

Bob, K4TAX

On 6/5/2020 1:07 PM, Jim Brown wrote:

> On 6/5/2020 10:23 AM, Chris Waldrup wrote:
>> This is probably overkill for QRP but I wanted to do it right like we
>> used to do in broadcast.
>
> The primary purpose of grounding bonding has NOTHING to do with radio
> -- it's for LIGHTNNG PROTECTION!
>
>
> On 6/5/2020 10:46 AM, Walter Underwood wrote:
> > Cad-weld seems a easier than the other approach described. It is
> more robust against corrosion, plus it is fun.
>
> Yes, it certainly is fun! I summoned my XYL and the neighbor's kid to
> watch. :)
>
> 73, Jim K9YC
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

Ed Tanton

Re: Self-fusing liquid electrical tape

In reply to this post by donovanf

WOW!!! That was so-o-o neat!!!

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of
[hidden email]
Sent: Friday, June 05, 2020 2:14 PM
To: [hidden email]
Subject: Re: [Elecraft] Self-fusing liquid electrical tape

Hey Jim,

If you think Cad-Welding a ground rod is fun to watch, take a look at
thermite welding of railroad tracks:

www.youtube.com/watch?v=5uxsFglz2ig

73
Frank
W3LPL

----- Original Message -----

From: "Jim Brown" <[hidden email]>
To: [hidden email]
Sent: Friday, June 5, 2020 6:07:22 PM
Subject: Re: [Elecraft] Self-fusing liquid electrical tape

On 6/5/2020 10:23 AM, Chris Waldrup wrote:
> This is probably overkill for QRP but I wanted to do it right like we used
to do in broadcast.

The primary purpose of grounding bonding has NOTHING to do with radio --
it's for LIGHTNNG PROTECTION!

On 6/5/2020 10:46 AM, Walter Underwood wrote:
> Cad-weld seems a easier than the other approach described. It is more
robust against corrosion, plus it is fun.

Yes, it certainly is fun! I summoned my XYL and the neighbor's kid to
watch. :)

73, Jim K9YC
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