[Milsurplus] [ARC5] Wire
Peter Gottlieb
nerd at verizon.net
Thu Sep 15 22:40:48 EDT 2011
These days you need to read much more than that... that's just the start. The
USA is pretty straightforward but when you get to the EU, China, Japan, etc it
gets really crazy with different "standards" sometimes even conflicting each other.
On 9/15/2011 10:14 PM, J. Forster wrote:
>> The outer coat is to reduce friction for pulling through conduit.
> Yes.
>
> I've seen 16 and 18 AWG, but yeah, we get it 10,000 feet at a time on big
> spools.
>
> MTW may be available.
>
> Yes,
>> printed with rating, it is required by the inspectors. If you are having
>> trouble
>> getting to sleep you can have a conversation about what the rating means
>> with my
>> safety and compliance guy.
> Nah. I just read the NEC.
>
> -John
>
> ================
>>
>> On 9/15/2011 9:35 PM, J. Forster wrote:
>>> Yes and no. It can be either nylon coated or not. Look at the spools of
>>> THHN at Home Depot or a similar place. THHN is mostly a temperature
>>> spec.
>>>
>>> There are other options like MTW.
>>>
>>> Also, THHN in sizes smaller than #14 is hard to get. It may be available
>>> through an electronics supplier, but you probably have to buy 1000'
>>> minimum.
>>>
>>> Finally, modern THHN is printed along its length. WW II wire was
>>> generally
>>> not, or if it was, it had circuit numbers on it.
>>>
>>> Best,
>>>
>>> -John
>>>
>>> ================
>>>
>>>
>>>> Nylon coated PVC sounds like THHN electrical conduit wire.
>>>>
>>>>
>>>>
>>>> On 9/15/2011 9:12 PM, J. Forster wrote:
>>>>> YW. It looks OK for chassis wiring, but, sadly, not for cables. I'm
>>>>> not
>>> sure there are any good alternatives to stranded Teflon in Expando
>>>>> for cables. The nylon coated PVC seems to be very hard to get.
>>>>> -John
>>>>> ===============
>>>>>> It may not be cheap but it's a heck of a lot easier. Thanks, John!
>>> Best regards,
>>>>>> Michael, WH7HG ex-K3MXO, ex-KN3MXO, WPE3ARS, BL01xh ex-Mensa A&P PP
>>> BGI
>>>>>> I am me. I’m the only one who’s qualified.
>>>>>> http://www.nationalmssociety.org/chapters/NTH/index.aspx
>>>>>> http://wh7hg.blogspot.com/
>>>>>> http://kludges-other-blog.blogspot.com
>>>>>> Hiki Nô!
>>>>>> -----Original Message-----
>>>>>> From: J. Forster [mailto:jfor at quikus.com]
>>>>>> Sent: Thursday, 15 September, 2011 14:50
>>>>>> To: h Kludge
>>>>>> Cc: arc5 at mailman.qth.net; milsurplus at mailman.qth.net
>>>>>> Subject: Re: [ARC5] Wire
>>>>>> Not cheap, but:
>>>>>> http://tubesandmore.com/Catalog/page_084_085.php
>>>>>> -John
>>>>>> ===========
>>>>>>> In looking at the fabric over rubber wiring used way back when,
>>>>>>> there
>>> seem
>>>>>>> to be two different flavors, one that has the fabric kind of loose
>>> and
>>>>>>> easily frayed and the other has the fabric somehow bonded to the
>>>>>>> rubber
>>>>>>> which reduces fraying and makes for neater work. Since I’m going to
>>>>>>> try
>>>>>>> my
>>>>>>> hand at making fabric over something wire in an attempt at making
>>>>>>> things
>>>>>>> appear even more authentic*, it would be nice to know how it was
>>>>>>> done
>>> originally. “Something” may wind up plastic, vinyl or Teflon
>>> dependent
>>>>>>> on
>>>>>>> what I can get that looks right as to overall bulk.
>>>>>>> * I may even try lacing in the tracers which would probably not be
>>>>>>> good
>>>>>>> therapy when they take me back to psych lockdown as a result of this
>>> activity. Nor would basket weaving. :-)
>>>>>>> The way I think this will work is to use white older type flat
>>> shoelaces,
>>>>>>> wet them and force them over forms (read as: dowels) while they dry
>>> to
>>>>>>> reduce or take out the creases. (This may also require a bit of
>>> ironing.)
>>>>>>> After that, introduce them to some RIT dye to get the right base
>>>>>>> colors
>>>>>>> for
>>>>>>> color coded wiring and put them back over the forms to dry.
>>>>>>> Assuming
>>> (and
>>>>>>> we all know what that word means) this works as planned, I may
>>>>>>> actually
>>>>>>> try
>>>>>>> lacing in the tracers although it would be insanely time& labor
>>> intensive
>>>>>>> and only a few people would actually realize that the tracers are
>>> supposed
>>>>>>> to be there. I think all of them are in these lists. Anyway, a
>>>>>>> little
>>>>>>> yellow varnish to give it the official MFP look and I should have
>>> wire
>>>>>>> good
>>>>>>> for open cables.
>>>>>>> If the basic project goes well – i.e., the part about using
>>>>>>> shoelaces to
>>>>>>> make a reasonable facsimile of WW II cloth covered wire – the next
>>>>>>> step
>>>>>>> would be to use the same basic technique to make vinyl over white
>>>>>>> woven
>>>>>>> fabric over vinyl wiring used in later aircraft. I’m not sure I
>>>>>>> know
>>> what
>>>>>>> to seal the fabric with but after that’s done the top coat can be a
>>>>>>> dip
>>>>>>> in
>>>>>>> Dip-It clear vinyl. If this works as I think it will, this will
>>> solve
>>>>>>> the
>>>>>>> problem of wiring up the Type 12 equipment with more or less period
>>> appropriate open wire.
>>>>>>> Using shoelaces presents two problems right off. First, the prices
>>> of
>>>>>>> good
>>>>>>> ones that don’t have the funky seams on each edge and are small
>>> enough
>>>>>>> have
>>>>>>> gone out of sight. Second, it limits the size of any given run to
>>> the
>>>>>>> length of the longest laces I can find. On the other hand, for
>>> everything
>>>>>>> except the SCR-A*-183 I’ll be using open wiring as much as possible,
>>> mostly
>>>>>>> because I like it but also because a good number of my connectors
>>>>>>> are
>>> for
>>>>>>> open wiring and it’s easier to convert the ones that aren’t to that
>>>>>>> than
>>>>>>> it
>>>>>>> is the ones for open wiring to shielded cable.
>>>>>>> So there it is. Thoughts?
>>>>>>> Best regards,
>>>>>>> Michael, WH7HG ex-K3MXO, ex-KN3MXO, WPE3ARS, BL01xh ex-Mensa A&P PP
>>>>>>> BGI
>>>>>>> I am me. I’m the only one who’s qualified.
>>>>>>> <http://www.nationalmssociety.org/chapters/NTH/index.aspx>
>>>>>>> http://www.nationalmssociety.org/chapters/NTH/index.aspx
>>>>>>> <http://wh7hg.blogspot.com/> http://wh7hg.blogspot.com/
>>>>>>> <http://kludges-other-blog.blogspot.com/>
>>>>>>> http://kludges-other-blog.blogspot.com
>>>>>>> Hiki Nô!
>>>>>>> ______________________________________________________________ ARC5
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