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Continuous copper wire to earth ground

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Continuous copper wire to earth ground Fpbear II 01-13-2007
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Posted by Mike Ryan on January 14, 2007, 8:18 am


On Sat, 13 Jan 2007 06:51:56 -0600, Dean Hoffman

>
>> I am extending the ground for the service panel with two 8' rods because the
>> pipes were re-done in PVC. I plan to attach #4 wire to the end of the
>> existing #6 wire with two copper split-bolt connectors and make the
>> connection real tight. I have been reading that the copper ground wire
>> should be one continuous wire. However I pefer not to mess with high
>> voltage and take apart the service panel to make it one continuous ground
>> wire. Are the split bolt connectors sufficient or is there some "physics"
>> reason it must be one wire? Or is it to prevent someone from accidentally
>> un-screwing the bolt?
>
> It's due to the destructive power of a lightning strike.
>The idea is to make it as easy as possible for the lightning to get to
>ground without damaging anything. There aren't supposed to be sharp
>bends in the wire to the ground rod either. The wire isn't supposed to
>be wrapped around anything. It's supposed to be as straight as
>possible. #6 is specified since a ground rod can handle only so much
>current anyhow. Going to a larger size wire won't help a whole bunch.
>
> Dean
>
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Why would sharp bends do anything? As long as the wire is continuous
the electrons will flow whatever shape the wire is.

I had someone tell me that making sharp bends in romex was bad too.
Thats bullshit. Electricity follows the copper. Bends dont matter.
When I wire something I always like to make it look neat bu bending
the wires around corners and keeping the bends tight to the structure.

AppliancePartsPros.com, Inc.
Posted by hallerb@aol.com on January 14, 2007, 10:01 am




> Why would sharp bends do anything? As long as the wire is continuous
> the electrons will flow whatever shape the wire is.
>
> I had someone tell me that making sharp bends in romex was bad too.
> Thats bullshit. Electricity follows the copper. Bends dont matter.
> When I wire something I always like to make it look neat bu bending
> the wires around corners and keeping the bends tight to the structure.

you create future fail spots, the bend stresses the metal and has a
good chance of it cracking or similiar in the future. cracked wires
overheat and cause fires

neatness only counts if it doesnt cause troubles.

as for the OP I would run a new ground line thru the clamp at the
copper line, jump out the meter even though it doesnt matter, ideally
the OLD water line could of been left in the ground disconnected at
both ends from water but still used for grounding.......

one thing the OP may find it very hard to drive the ground rods,
standing on ladder with 8 foot rod waving in breeze.

if the ground is hard it might be easier to have a electrician do it
one with proper driver for ground rods


Posted by Steve Barker on January 14, 2007, 11:38 am


A steel post driver works great down to the last 2 feet.

--
Steve Barker


> one thing the OP may find it very hard to drive the ground rods,
> standing on ladder with 8 foot rod waving in breeze.
>
> if the ground is hard it might be easier to have a electrician do it
> one with proper driver for ground rods
>



Posted by CJT on January 14, 2007, 4:18 pm


hallerb@aol.com wrote:

>
>>Why would sharp bends do anything? As long as the wire is continuous
>>the electrons will flow whatever shape the wire is.
>>
>>I had someone tell me that making sharp bends in romex was bad too.
>>Thats bullshit. Electricity follows the copper. Bends dont matter.
>>When I wire something I always like to make it look neat bu bending
>>the wires around corners and keeping the bends tight to the structure.
>
>
> you create future fail spots, the bend stresses the metal and has a
> good chance of it cracking or similiar in the future. cracked wires
> overheat and cause fires

... and, at some level, lightning can exhibit RF properties where
bends CAN make a difference.

Why tempt the fates?

>
> neatness only counts if it doesnt cause troubles.
>
> as for the OP I would run a new ground line thru the clamp at the
> copper line, jump out the meter even though it doesnt matter, ideally
> the OLD water line could of been left in the ground disconnected at
> both ends from water but still used for grounding.......
>
> one thing the OP may find it very hard to drive the ground rods,
> standing on ladder with 8 foot rod waving in breeze.
>
> if the ground is hard it might be easier to have a electrician do it
> one with proper driver for ground rods
>


--
The e-mail address in our reply-to line is reversed in an attempt to
minimize spam. Our true address is of the form che...@prodigy.net.

Posted by George E. Cawthon on January 14, 2007, 4:46 pm


hallerb@aol.com wrote:
>
>> Why would sharp bends do anything? As long as the wire is continuous
>> the electrons will flow whatever shape the wire is.
>>
>> I had someone tell me that making sharp bends in romex was bad too.
>> Thats bullshit. Electricity follows the copper. Bends dont matter.
>> When I wire something I always like to make it look neat bu bending
>> the wires around corners and keeping the bends tight to the structure.
>
> you create future fail spots, the bend stresses the metal and has a
> good chance of it cracking or similiar in the future. cracked wires
> overheat and cause fires

I agree you shouldn't bend it to tight like a
near perfect 90 degrees but you don't need to bend
it that much to get good looks. Bending copper
work harden it and further bending operations can
make it break, but exactly how many bends before
it breaks. When you wrap a 12 gauge wire around a
post, tighten down the screw, and bend the tail to
make it break off, how many bends (back and forth
motions) do you make? For me it is at least four
each way at a very sharp angle. But when you
install romex, you bend it and then how much
additional bending do you do, and how sharp are
the bends compared to a single stripped wire? My
guess is that you would have to do a lot of very
sharp bending to get the wires work hardened
enough to crack.

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