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nuckollsr(at)cox.net
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 Posted: Fri May 11, 2007 6:27 am Post subject: 14awg into a 18 pin |
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At 07:55 AM 5/11/2007 -0400, you wrote:
| Quote: |
<terrence_miles(at)hotmail.com>
Hi Bob,
Got a question. I'm wiring a GS Air Nav/Strobe system. I need to size the
wire run up to 14AWG on the power and ground run for the strobe, but the pig
tail wire out of the molex like plug that goes into their power/control box
is just regular auto wire and 18 at best. They want it fused at 15a.
Sorry I cannot say what the amp draw will be.
Is it OK to run a few inches of that original wire in and out of their
connector and upsize the balance of both wire runs? We are talking a few
inches in a 18 foot run. I'm in a pusher. What's normally done in a case
like this?
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A 15A branch is properly wired with 14AWG. It' perfectly
within the bounds of good practice to drop to a smaller
wire for a short distance to accommodate a smaller pin
in a connector. It would be really useful to do a current
measurement on the system once you have it installed.
Most suppliers of such products do not have strong
systems design and integration background . . . and
classically, almost never touch airplanes from the
airframe designer's perspective. I'm betting that the
'real' requirements are lower than what they recommend
but installing as you've proposed with 15A/14AWG spliced
into the connector's pigtail is perfectly okay thing to
do.
Bob . . .
----------------------------------------
( "Physics is like sex: sure, it may )
( give some practical results, but )
( that's not why we do it." )
( )
( Richard P. Feynman )
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CardinalNSB(at)aol.com
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| Posted: Sat May 12, 2007 1:24 pm Post subject: 14awg into a 18 pin |
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If I have determined that it is "safe" to splice in a short run of 18 awg into a run of 14 awg in order to fit the 18 awg into a defined pin that won't accomodate the 14awg;
Then why not cut off a few strands of the 14awg until it fits into the pin?
That would avoid a splice.
The distance of the "small" wire would be small, a few hundredths of an inch perhaps between the "orphaned cut off strands" and the pin, versus a longer length to accomodate the splice.
Would soldering the "orphaned" strand to the end of the pin help or hurt (assuming proper strain relief)?
I envision 2 scenarios:
1. The individual strand size of the 14awg is not larger than the individual strand size for the 18awg.
2. If the individual strand size of the 14awg is larger than the individual strand size for the 18awg.
I thank you for any insight into this, or reference. Skip Simpson
See what's free at AOL.com.
[quote][b]
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