So what did you do in your previous life, anyway?
A lot, I tried write a high level synopsis and stopped as it went over
2,000 words.
Let’s just say I’m a retired Q&R Manger from Silicon
Valley who preferred to be hands-on whenever I could. Translation, tons of product
qualification testing, failure analysis, product safety, EMI testing, frequent
flier miles, presentations, and some aerospace roots. I have a PCMCIA slot related
patent upstairs and put my first design through UL in ’72.
I’ve even been the expert witness in a few product liability or wrongful
death suits where I did the failure analysis but every time the corporate defendants
have settled within days of my deposition.
Hmm… I guess I didn’t come off as flappable in court.
Phil Agur s/v Wing Tip
Commodore, Call Sign WCW3485
IC27/270A
MMSI 366901790
www.catalina27.org
Vessel Doc# 1039809
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of [EMAIL PROTECTED]
Sent: Wednesday, June 14, 2006 7:22 AM
To: [email protected]
Subject: catalina27-talk: Crimp
testing
Phil, do you have any BORING hobbies? Stamp
collecting? (I guess that wouldn't be boring if you collected them in
person... never mind). Frog stalking? Pie baking?
Wait--none of those are boring, either, probably.
Anyway--pull test for 12AWG wire is 70 pounds per
UL486 specs, or 110 pounds per MIL-T-7928. But we're not sailing
airplanes, so I'd go with 70 pounds.
For what it's worth, I was pretty saddened by the
electrical panel in my 1977 C27--poor crimps, both factory and PO,
and poor quality wire and switchgear. Corrosion was rampant, even though
this boat has never seen salt water. It's all gone now, and I'm
installing new wiring and new panels above the galley. Pictures when it's
all done... I had pretty much settled my mind on floating
ground and no lightning protection, but now I've been convinced by a book on
sailboat electrical systems to bond everything and lightning protect the whole
works. Sigh. More weight, more work...
David Shaddock
----- Original Message -----
From: Phil Agur <[EMAIL PROTECTED]>
Date: Tuesday, June 13, 2006 15:53
Subject: RE: catalina27-talk: 12 Volt Searchlight
To: [email protected]
> David,
>
>
>
> Related to another hobby of mine, what would you say is the
> appropriatenumber for a pull test on stranded 12 AWG? I don't
> know the stranding but
> its fine. I haven't been in a position to oversee production
> crimp machine
> audits for 30 years but I'd guess 45-50 lbs.
>
>
>
> I've seen so much bad harness workmanship lately I was beginning
> to think UL
> had relaxed its requirement that each crimp be formed using the crimp
> manufactures specified tool. Glad to hear I'm not off in left
> field after
> all.
>
>
>
> Wing Tip went all dark on SF Bay a just after ushering in New
> Years '96.
> She'd been with us for only a month so I was appalled when I
> popped the
> electrical panel and found a failed crimp. I was about to be very
> disappointed in CY when I realized every affected wire was
> related to a
> dealer installed accessory. Too bad he cut a main feed to splice
> in a branch
> circuit. Thank goodness for propane powered soldering irons.
> (Manned space
> flight certified at one time and the other skipper helping was
> an AT&T
> switch installer.)
>
>
>
> You would think a dealer would know enough to restrict their
> technicians to
> Anchor brand crimps and their matching ratchet crimper. I don't
> have a salt
> spray chamber to play with anymore but it sure looks like a gas
> tight seal
> to me.
>
>
>
> Obviously the tech thought his work passed the crimp and jerk
> test but he
> didn't achieve gas tight seal. We soldered every one of his
> crimps once we
> identified his tool marks versus the factories.
>
>
>
> Phil
>
Agur
s/v Wing Tip
>
>
Commodore,
Call Sign WCW3485
>
>
IC27/270A
MMSI 366901790
>
> www.catalina27.org Vessel Doc# 1039809
>
>
>
> -----Original Message-----
> From: [email protected]
> [mailto:[EMAIL PROTECTED] On Behalf Of
> [EMAIL PROTECTED]: Tuesday, June 13, 2006 7:24 AM
> To: [email protected]
> Subject: Re: catalina27-talk: 12 Volt Searchlight
>
>
>
> Oops, missed this message! FWIW, the MX150L can be crimped
> by either of two
> crimping tools. The one I'd suggest is really very
> inexpensive: (relatively
> speaking) #489 from Waytek, about $30. The one we use here
> costs $310.00.
> But the cheaper one is really a very good crimper and will last
> a lifetime.
>
>
>
>
> As far as using another crimper--well, maybe... I
> never would in
> production, but that's because we're incredibly fussy about
> quality. But if
> you're working on your own boat, and it's not a life-safety
> issue, who am I
> to judge? Here's the thing: the very best test for crimp
> quality is a pull
> test. We use a specialized machine with an electronic
> strain-gage that
> pulls a wire away from a clamped terminal at a rate of one inch
> of stretch
> per minute, and records the force it took to break the
> wire. (We test
> samples, not production items--we never ship a pull-tested wire
> because the
> strands might break inside the wire, and we test to destruction
> anyway).For 16 AWG wire, for example, we're looking for a
> capability of 30 pounds.
> So what I propose is that you use your crimper-wannabe to crimp
> a sample of
> the MX150L terminals to a sample wire that matches your
> searchlight or power
> cable, clamp the end of the terminal in a vise, and carefully
> hang 30 pounds
> from the wire (with no bending of the wire coming off the
> terminal--pull
> straight!). This is a quick and dirty test. That's
> for 16 AWG. If you're
> using a different gauge, let me know and I'll give you a pound
> rating. If
> the wire breaks at the back of the terminal, you either over-
> crimped it or
> did a poor job of stripping and cut strands of the wire.
> If the wire slips
> out of the terminal, it's not a strong-enough crimp and would
> make a weak
> electrical connection,....unless carefully soldered.
> hmm..... There's an
> alternative, isn't there? But I hate to suggest it.
> You have to be a
> competent solderer, and you have to make a crimp that's close
> enough to the
> real thing to let you plug the terminals into the
> housing...
>
>
>
> Let me know if I can help further. Hope this all makes sense.
>
>
>
> David Shaddock
>
> Rockford, IL
>
> ----- Original Message -----
> From: Harvey Rosenberg <[EMAIL PROTECTED]>
> Date: Tuesday, June 6, 2006 17:23
> Subject: Re: catalina27-talk: 12 Volt Searchlight
> To: [email protected]
>
> Hi Dave,
>
> Looked at Waytekwire web site and they say on the catalog page,
> "MX150Lcrimpimg tool must be used to insure a good seal". Can
> you use any high
> quality crimping tool?
>
> Harvey Rosenberg C-27TR #6023, 1985, M-18, Stony Point NY
>
>
> ------ Original Message ------
> Received: Fri, 02 Jun 2006 09:17:52 AM EDT
> From: <[EMAIL PROTECTED]>
> To: [email protected]
> Subject: Re: catalina27-talk: 12 Volt Searchlight
>
>
>
> I have another suggestion, if you want something watertight
> while in
> operation. How about abandoning the cigar lighter approach
> and going to a
> plug/receptacle combination that's meant to be IP67
> (dustproof/immersion-safe) in operation? Molex makes a
> series of connectors
> that are used by many automobile/tractor/motorcycle/offroad equipment
> manufacturers. The series is MX150L. For example,
> they have a receptacle
> that's completely sealed, made to mount to a panel; the screw
> holes for
> mounting are really little plastic 'cans' that won't let water
> through to
> the backside. They're not very expensive. either. My
> company buys them
> direct from Molex (we manfacture wiring harnesses) but they're
> available to
> the public from Waytek (www.waytekwire.com
> <http://www.waytekwire.com/> or
> 800-328-2724).
>
>
>
> The one part they DON'T have (yet--it's coming soon) is a cover
> plug. But
> we use spare plugs and fill them with 'blank circuit
> plugs'.
>
>
>
> I'm using them all over my 1977 C27--mast base, power and data
> connectionsat my helm, masthead lights, etc. And our
> customers love them--some big
> names in the industrial equipment industry...
>
>
>
> David Shaddock
>
> Rockford, IL
>
> ----- Original Message -----
> From: "Rudolph S. Behar" <[EMAIL PROTECTED]>
> Date: Thursday, June 1, 2006 17:14
> Subject: Re: catalina27-talk: 12 Volt Searchlight
> To: [email protected]
>
> > Harvey,
> >
> > Mount it reasonably high, of course. My switches are all
> > at factory
> > height, say 12" off the floor boards. Now if I get
> > 4" on the
> > floorboards and eveything is shloshing around, bzzzt!
> >
> > Rudy B.
> >
> > Rudolph S. Behar wrote:
> >
> > > Harvey,
> > >
> > > Mine, from West, has a plastic cover that's hinged to the
> > body.
> > > That's, I suppose, to splashproof it. It cant be
> anymore
> > waterproof
> > > than the rear side of it, where the connections are,
> no?
> > And, of
> > > course, it's not waterproof while it's being used.
> > >
> > > Rudy B.
> > >
> > > Harvey Rosenberg wrote:
> > >
> > >> Hi,
> > >>
> > >> I have a 12 volt searchlight with a cigarette lighter end.
> I
> > know you
> > >> can buy a receptacle with a watertight seal, but as soon as
> > you open
> > >> the seal and insert the cigarette lighter adapter in
> > it, it is no
> > >> longer waterproof. Any suggestions?
> > >>
> > >>
> >
>
>
>
>
|
