Today's Message Index:
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1. 05:18 AM - Re: How terrible is it to use a #8 ring terminal on #6 screw? (racerjerry)
2. 10:15 AM - Re: How terrible is it to use a #8 ring terminal on #6 screw? (Robert L. Nuckolls, III)
3. 12:33 PM - Re: How terrible is it to use a #8 ring terminal on #6 screw? (rparigoris)
Message 1
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| Subject: | Re: How terrible is it to use a #8 ring terminal on |
#6 screw?
I see no problem as long as there is no interference at the terminal block barrier
strips. I surely would not use a larger terminal (#10), though. The size
difference probably makes it even more important to install a train relief /
support for the wires close to your terminal block. Glad to see that you are
using star washers as they work very well.
Lengthening your wires with an extra splice may just offer another chance for moisture
to get in and do its dirty work, depending on the environment.
Jerry King
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Jerry King
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=503008#503008
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| Subject: | Re: How terrible is it to use a #8 ring terminal |
on #6 screw?
At 05:05 PM 8/29/2021, you wrote:
>
>Hi Group Dumb Thumb had some #8 ring terminals put on #22 or #20
>wires and the screws are #6 on the terminal block.
terminal block with studs or screws?
>We have #6 phosphor bronze star washers on the screws. Is there any
>problems using as is? Or is
>it recommended to change over to #6 ring terminals that will require
>lengthening wires. Thx. Ron P.
In the heavy iron factories, barrier strips
with screws are generally avoided. Sometimes
you just can't (like B&C alternator controllers)
but if you do have a choice, terminal strips
with captive studs are preferred. You can secure
the terminal-stack with metal lock nuts.
With respect to oversized holes in terminals recall
that we're wanting to achieve a gas-tight interface
between conducting components . . . If the hole
is oversized, then area around the stud goes down.
Force of the screw then exerts more pressure on
as a function of reduced area.
So electrically, I don't think there's much
of a worry and for small (low mass) wires,
there's probably not much in the way of
vibrational forces that might tend to loosen
the threaded fasteners. The lock washers only
increase probability that an loosening force
applied through the terminal is more tightly
coupled to the screw.
As we discussed a few weeks ago, the first
time the joint MOVES, tension in that joint
goes down. Just how much and how fast is subject
to a lot of variables.
Got no heartburn about the terminals but I'd
really like to see a mechanically more robust
terminal strip. What system(s) use these
wires? How critical to comfortable completion
of a flight?
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
Message 3
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| Subject: | Re: How terrible is it to use a #8 ring terminal on |
#6 screw?
Hi Bob What the #6 screws are doing is to sandwich the ring terminals to a silver
plated copper strip (attaches port #4 battery cable that goes to aft mounted
battery on Europa XS Mono) and the flat terminal blocks are just acting as mounting
nuts. It's acting as a ground block for non essential for flight grounds
that I didn't want to run to my firewall field of tabs:
https://1drv.ms/u/s!Ah1S270Nwg9Vgd1med74mMX78IEPeg
star washers not yet installed. The stud you see will run power to port headrest.
The reason the copper strip is sooo big is if I ever need to jump start, I
can do so through my favorite paralleled Anderson Power pole connectors in starboard
headrest:
https://1drv.ms/u/s!Ah1S270Nwg9Vgd4N_6p3XLoaofcVhQ
so it's possible that two of those #6 screw connections may be called upon to connect
to my copper strip to jump start Rotax 914 with heavy duty starter.
Ron P.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=503010#503010
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