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AVick
Joined: 11 Feb 2010
Posts: 3
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 Posted: Sun Jun 13, 2010 5:37 am Post subject: Welding Cable for Battery Leads. |
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I see other post that approves the use of welding cable for the main battery feeds to the contractor and starter etc. My question is if we are being careful to use Tefzel for all our wire to reduce the chance of smoke in the cockpit why would you change that for the main power feeds? Is it easier to work with than 4 ga Tefzel, that is more flexible? I am planning on using the welding cable because it is local and cheaper. But have that concern I would like to address on the safety issue.
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nuckolls.bob(at)aeroelect
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| Posted: Sun Jun 13, 2010 6:21 am Post subject: Welding Cable for Battery Leads. |
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At 08:37 AM 6/13/2010, you wrote:
I see other post that approves . . .
The operative word is "suggests".
. . . the use of welding cable for the main battery feeds to the
contractor and starter etc. My question is if we are being careful
to use Tefzel for all our wire to reduce the chance of smoke in the
cockpit why would you change that for the main power feeds? Is it
easier to work with than 4 ga Tefzel, that is more flexible?
Why not 4AWG welding cable which is more flexible
yet?
I am planning on using the welding cable because it is local and
cheaper. But have that concern I would like to address on the safety issue.
Just for grins, take a piece of 22AWG Tefzel wire about
2 feet long, strip both ends about 1/2", and grab
the bared ends in a two pairs of pliers. Now stob
the pliers to the terminals of your car battery.
Observe whether or not Tefzel wire "does not
smoke". Take a little whiff of the gray-stuff
wafting away in the air . . . is it something
to which one might wish to become addicted?
My point is that there is no such thing as
a wire insulation that (1) doesn't smoke
or (2) produces a smoke that does not produce
severe discomfort in the cockpit.
Of course those-who-know-more-about-airplanes-
than-we-do are ever more willing to "approve"
or "disapprove" our selection of materials all
in the name of the "greater good".
Bottom line is that safety comes from not having
the wire smoke in the first place which has to
do more with architecture and materials. I.e.
installation of fuses and breakers. And
installation techniques, I.e, don't let wires
rub on sharp sheet metal edges.
Beyond this, insulation selection is driven
by considerations for durability in service.
Welding cable is designed to lay on gravel
roads and be run over by dump trucks dripping
oil. They'll be just fine under the floorboards
of your flying fliver.
Risk is managed more by what YOU DO than by
what YOU BUY.
Bob . . .
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ceengland(at)bellsouth.ne
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| Posted: Sun Jun 13, 2010 1:02 pm Post subject: Welding Cable for Battery Leads. |
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On 6/13/2010 9:24 AM, Robert L. Nuckolls, III wrote:
| Quote: |
<nuckolls.bob(at)aeroelectric.com>
At 08:37 AM 6/13/2010, you wrote:
I see other post that approves . . .
The operative word is "suggests".
. . . the use of welding cable for the main battery feeds to the
contractor and starter etc. My question is if we are being careful to
use Tefzel for all our wire to reduce the chance of smoke in the
cockpit why would you change that for the main power feeds? Is it
easier to work with than 4 ga Tefzel, that is more flexible?
Why not 4AWG welding cable which is more flexible
yet?
I am planning on using the welding cable because it is local and
cheaper. But have that concern I would like to address on the safety
issue.
Just for grins, take a piece of 22AWG Tefzel wire about
2 feet long, strip both ends about 1/2", and grab
the bared ends in a two pairs of pliers. Now stob
the pliers to the terminals of your car battery.
Observe whether or not Tefzel wire "does not
smoke". Take a little whiff of the gray-stuff
wafting away in the air . . . is it something
to which one might wish to become addicted?
My point is that there is no such thing as
a wire insulation that (1) doesn't smoke
or (2) produces a smoke that does not produce
severe discomfort in the cockpit.
Of course those-who-know-more-about-airplanes-
than-we-do are ever more willing to "approve"
or "disapprove" our selection of materials all
in the name of the "greater good".
Bottom line is that safety comes from not having
the wire smoke in the first place which has to
do more with architecture and materials. I.e.
installation of fuses and breakers. And
installation techniques, I.e, don't let wires
rub on sharp sheet metal edges.
Beyond this, insulation selection is driven
by considerations for durability in service.
Welding cable is designed to lay on gravel
roads and be run over by dump trucks dripping
oil. They'll be just fine under the floorboards
of your flying fliver.
Risk is managed more by what YOU DO than by
what YOU BUY.
Bob . . .
And, if I may piggy back on this, the fact that it is more flexible
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means that a less than perfect installation is less likely to cause
fatigued connections (or even fatigued wire).
Charlie
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