Today's Message Index:
----------------------
1. 12:32 AM - Re: com dual PWR/GND on two fuses? (Werner Schneider)
2. 05:51 AM - Re: com dual PWR/GND on two fuses? (user9253)
3. 06:25 AM - Re: com dual PWR/GND on two fuses? (Robert McCallum)
4. 07:43 AM - Re: Re: com dual PWR/GND on two fuses? (Werner Schneider)
5. 08:01 AM - Tosten grip wiring with car-relay for trim (Achille)
6. 09:14 AM - Re: com dual PWR/GND on two fuses? (Alec Myers)
7. 01:12 PM - Re: com dual PWR/GND on two fuses? (Charlie England)
8. 02:02 PM - Re: com dual PWR/GND on two fuses? (Alec Myers)
9. 07:46 PM - Re: Tosten grip wiring with car-relay for trim (Robert L. Nuckolls, III)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: com dual PWR/GND on two fuses? |
Ok after reading again through the AeroElectric Connection about wires
and fuses I come to following conclusion.
According the Icom Manual we use 2x AWG20, together they are fine for a
10A fuse, as I remain with my original SL-30 setup (2 wires with a fuse
each) I could go for 7.5A each, considering the power of the unit I
might stay with 2x 5 A out of convienence but will first check how much
power the Icom draws when transmitting, I bet it will be below 5 :). If
I would go for a dual cable crimped into a single fuse, I would rather
prefer a 7.5A fuse, so when one wire breaks it will still be adequate,
however taking into account the relative short wire a 10A might be fine.
Thanks for your ideas.
Cheers Werner
On 19.06.2017 19:35, Robert McCallum wrote:
>
> Always bear in mind that the fuses are sized to protect the wire and
> what is connected at the other end (in this case your radio) has no
> influence on the fuse size used.
>
> As long as the wires are adequate for the 10 Amps then 10 Amp fuses
> are fine and certainly if the existing wiring will supply the new
> device's requirements then they may be reused/re-purposed.
>
> Bob McC
>
>
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: com dual PWR/GND on two fuses? |
Some avionics use two pins for positive power and two pins for negative power.
The reason for using two pins is not for redundancy. The reason is that if only
one D-Sub pin carried all of the current, it would be overloaded. The problem
of using two fuses is that if one fuse blows, then all of the current will
flow through one D-Sub pin and overload it.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=470261#470261
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | com dual PWR/GND on two fuses? |
Correct. However the assumption must be made that the wire installed is ade
quate
for the intended task. My point was that if you've installed a 14ga wire yo
u
protect it with the appropriate fuse for that wire, and not necessarily dow
nsize
the fuse because the device you're powering draws only 1 amp. Once adequacy
of
both wire and fuse is established then the fuse size chosen becomes a funct
ion
of the wire and not the connected load.
Respectfully
Bob McC
> ---------- Original Message ----------
> From: Carlos Trigo <trigo@mail.telepac.pt>
> Date: June 19, 2017 at 5:38 PM
>
>
> Hi Bob
>
>
>
> You are right that the fuse is there to protect the wire, but the siz
e (in
> A) of the fuse is a function of the current which is drawn by what is
> connected at the other end of the wire, isn=99t it?
>
>
>
> Otherwise you could put a 1A fuse to protect a #24 wire with a pitot
> heater at the end, and you would never see that heater working when you w
anted
> it.
>
>
>
> With due respect
>
> Carlos
>
>
>
> De: owner-aeroelectric-list-server@matronics.com
> [mailto:owner-aeroelectric-list-server@matronics.com] Em nome de Robert
> McCallum
> Enviada: Monday, June 19, 2017 6:35 PM
> Para: aeroelectric-list <aeroelectric-list@matronics.com>
> Assunto: Re: AeroElectric-List: com dual PWR/GND on two fuses?
>
>
>
> Always bear in mind that the fuses are sized to protect the wire and
what
> is connected at the other end (in this case your radio) has no influence
on
> the fuse size used.
>
> As long as the wires are adequate for the 10 Amps then 10 Amp fuses a
re
> fine and certainly if the existing wiring will supply the new device's
> requirements then they may be reused/re-purposed.
>
> Bob McC
>
> > >
> > ---------- Original Message ----------
> > From: Werner Schneider <glastar@gmx.net <mailto:glastar@gmx.net
> >
> > Date: June 16, 2017 at 5:20 PM
> >
> >
> > <glastar@gmx.net <mailto:glastar@gmx.net> >
> >
> > Hello,
> >
> > most avionics do have PWR and GND on two pins. My SL30 had even
one
> > used
> > for the NAV part (3A fused) and one for the COM part (5A fused)
.
> >
> > I have to replace it with a new 8.33, but just going for a COM
right
> > now, that one has as well 2 pins each tied together, PWR onto a
10A
> > fuse
> > (8W COM).
> >
> > Is there any disadvantage, if I use the existing cabling with t
he 2x
> > GND/PWR on extra fuses? Should I use 2x10A fuses (for a 8W com
I
> > found
> > the 10A a bit high).
> >
> > Thanks for your advice
> >
> > Cheers W-==================
===============
> >
> >
> > >
> >
>
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: com dual PWR/GND on two fuses? |
Thanks Joe for that warning, that is why I fuse for 5A only I still
wonder the Icom uses a 10 A fuse for a 8W com and the SL30 was using a
5A for a 12 W COM.
I believe the d-subs are rated 5A and if you break one cable it would be
the same issue at the pin side.
At the end I will see what it draws (the KX-125 I had at the begin on
Xmit was drawing 3.8A) and leave another 30% as margin. it is just
convenient to leave it as it is.
Cheers Werner
On 20.06.2017 14:49, user9253 wrote:
>
> Some avionics use two pins for positive power and two pins for negative power.
The reason for using two pins is not for redundancy. The reason is that if
only one D-Sub pin carried all of the current, it would be overloaded. The problem
of using two fuses is that if one fuse blows, then all of the current will
flow through one D-Sub pin and overload it.
>
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Tosten grip wiring with car-relay for trim |
Hello,
I want to wire my new grip tosten with my basic 12v electrical actuating as trim
(up/down) pulling a spring.
I bought a double car relay to do some test to find the good wiring diagram but
before that I prefer asking in this forum how can I wire it if anybody know the
response ?
Before I was a double pole switch, wire by the previous owner.
I had a problem with the previous wiring, when i actuated my trim, my compas begin
to turn completely. The motor/switch were not close to the compas.
I have tested to set the motor very close to the compas to do a test. Without all
the wire juste motor and a small battery. And in this case it don't turn !
I don't understand why.
I find this documentation to do my wire.
Thank you in advance.
Mickal
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=470273#470273
Attachments:
http://forums.matronics.com//files/capture_dcran_2017_06_20__170003_154.png
http://forums.matronics.com//files/capture_dcran_2017_06_20__165117_106.png
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: com dual PWR/GND on two fuses? |
It would be dumb to put a 20A breaker on a 2A load, regardless of what wire y
ou used.
On Jun 20, 2017, at 09:23, Robert McCallum <robert.mccallum2@sympatico.ca> w
rote:
Correct. However the assumption must be made that the wire installed is adeq
uate for the intended task. My point was that if you've installed a 14ga wir
e you protect it with the appropriate fuse for that wire, and not necessaril
y downsize the fuse because the device you're powering draws only 1 amp. Onc
e adequacy of both wire and fuse is established then the fuse size chosen be
comes a function of the wire and not the connected load.
Respectfully
Bob McC
> ---------- Original Message ----------
> From: Carlos Trigo <trigo@mail.telepac.pt>
> Date: June 19, 2017 at 5:38 PM
>
> Hi Bob
>
>
>
> You are right that the fuse is there to protect the wire, but the size (in
A) of the fuse is a function of the current which is drawn by what is conne
cted at the other end of the wire, isn=99t it?
>
>
>
> Otherwise you could put a 1A fuse to protect a #24 wire with a pitot heate
r at the end, and you would never see that heater working when you wanted it
.
>
>
>
> With due respect
>
> Carlos
>
>
>
> De: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectri
c-list-server@matronics.com] Em nome de Robert McCallum
> Enviada: Monday, June 19, 2017 6:35 PM
> Para: aeroelectric-list <aeroelectric-list@matronics.com>
> Assunto: Re: AeroElectric-List: com dual PWR/GND on two fuses?
>
>
>
> Always bear in mind that the fuses are sized to protect the wire and what i
s connected at the other end (in this case your radio) has no influence on t
he fuse size used.
>
> As long as the wires are adequate for the 10 Amps then 10 Amp fuses are fi
ne and certainly if the existing wiring will supply the new device's require
ments then they may be reused/re-purposed.
>
> Bob McC
>
> ---------- Original Message ----------
> From: Werner Schneider <glastar@gmx.net>
> Date: June 16, 2017 at 5:20 PM
>
>
>
>
> Hello,
>
> most avionics do have PWR and GND on two pins. My SL30 had even one used
> for the NAV part (3A fused) and one for the COM part (5A fused).
>
> I have to replace it with a new 8.33, but just going for a COM right
> now, that one has as well 2 pins each tied together, PWR onto a 10A fuse
> (8W COM).
>
> Is there any disadvantage, if I use the existing cabling with the 2x
> GND/PWR on extra fuses? Should I use 2x10A fuses (for a 8W com I found
> the 10A a bit high).
>
> Thanks for your advice
>
> Cheers W-======================
===========
>
>
> >
>
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: com dual PWR/GND on two fuses? |
Unless, of course, you have a limited number of fuse locations, and
therefore, multiple non-critical 2A loads on one circuit that has wiring
sized to accept a 20A fuse.
The fuse protects the wire. (There's a period at the end of that
sentence...) :-)
On 6/20/2017 11:13 AM, Alec Myers wrote:
> It would be dumb to put a 20A breaker on a 2A load, regardless of what
> wire you used.
>
> On Jun 20, 2017, at 09:23, Robert McCallum
> <robert.mccallum2@sympatico.ca <mailto:robert.mccallum2@sympatico.ca>>
> wrote:
>
> Correct. However the assumption must be made that the wire installed
> is adequate for the intended task. My point was that if you've
> installed a 14ga wire you protect it with the appropriate fuse for
> that wire, and not necessarily downsize the fuse because the device
> you're powering draws only 1 amp. Once adequacy of both wire and fuse
> is established then the fuse size chosen becomes a function of the
> wire and not the connected load.
>
> Respectfully
>
> Bob McC
>
>
>> ---------- Original Message ----------
>> From: Carlos Trigo <trigo@mail.telepac.pt
>> <mailto:trigo@mail.telepac.pt>>
>> Date: June 19, 2017 at 5:38 PM
>>
>> Hi Bob
>>
>> You are right that the fuse is there to protect the wire, but the
>> size (in A) of the fuse is a function of the current which is drawn
>> by what is connected at the other end of the wire, isnt it?
>>
>> Otherwise you could put a 1A fuse to protect a #24 wire with a pitot
>> heater at the end, and you would never see that heater working when
>> you wanted it.
>>
>> With due respect
>>
>> Carlos
>>
>> *De:* owner-aeroelectric-list-server@matronics.com
>> <mailto:owner-aeroelectric-list-server@matronics.com>
>> [mailto:owner-aeroelectric-list-server@matronics.com] *Em nome de
>> *Robert McCallum
>> *Enviada:* Monday, June 19, 2017 6:35 PM
>> *Para:* aeroelectric-list <aeroelectric-list@matronics.com
>> <mailto:aeroelectric-list@matronics.com>>
>> *Assunto:* Re: AeroElectric-List: com dual PWR/GND on two fuses?
>>
>> Always bear in mind that the fuses are sized to protect the wire and
>> what is connected at the other end (in this case your radio) has no
>> influence on the fuse size used.
>>
>> As long as the wires are adequate for the 10 Amps then 10 Amp fuses
>> are fine and certainly if the existing wiring will supply the new
>> device's requirements then they may be reused/re-purposed.
>>
>> Bob McC
>>
>> ---------- Original Message ----------
>> From: Werner Schneider <glastar@gmx.net <mailto:glastar@gmx.net>>
>> Date: June 16, 2017 at 5:20 PM
>>
>>
>> <glastar@gmx.net <mailto:glastar@gmx.net>>
>>
>> Hello,
>>
>> most avionics do have PWR and GND on two pins. My SL30 had even
>> one used
>> for the NAV part (3A fused) and one for the COM part (5A fused).
>>
>> I have to replace it with a new 8.33, but just going for a COM right
>> now, that one has as well 2 pins each tied together, PWR onto a
>> 10A fuse
>> (8W COM).
>>
>> Is there any disadvantage, if I use the existing cabling with the 2x
>> GND/PWR on extra fuses? Should I use 2x10A fuses (for a 8W com I
>> found
>> the 10A a bit high).
>>
>> Thanks for your advice
>>
>> Cheers W-=================================
>>
>> >
>>
>
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
Message 8
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: com dual PWR/GND on two fuses? |
It's not an absolute requirement that, for the fuse to do its job and protec
t the wire, it has exactly to match the listed maximum current capacity of t
he wire. A fuse can protect the wire just as well (and some who live on the e
dge might say even better) if the fuse is chosen to be appropriate to the lo
ad. However you want to punctuate it.
On Jun 20, 2017, at 16:15, Charlie England <ceengland7@gmail.com> wrote:
Unless, of course, you have a limited number of fuse locations, and therefor
e, multiple non-critical 2A loads on one circuit that has wiring sized to ac
cept a 20A fuse.
The fuse protects the wire. (There's a period at the end of that sentence...
) :-)
> On 6/20/2017 11:13 AM, Alec Myers wrote:
> It would be dumb to put a 20A breaker on a 2A load, regardless of what wir
e you used.
>
> On Jun 20, 2017, at 09:23, Robert McCallum <robert.mccallum2@sympatico.ca>
wrote:
>
> Correct. However the assumption must be made that the wire installed is ad
equate for the intended task. My point was that if you've installed a 14ga w
ire you protect it with the appropriate fuse for that wire, and not necessar
ily downsize the fuse because the device you're powering draws only 1 amp. O
nce adequacy of both wire and fuse is established then the fuse size chosen b
ecomes a function of the wire and not the connected load.
> Respectfully
> Bob McC
>
>> ---------- Original Message ----------
>> From: Carlos Trigo <trigo@mail.telepac.pt>
>> Date: June 19, 2017 at 5:38 PM
>>
>> Hi Bob
>>
>>
>>
>> You are right that the fuse is there to protect the wire, but the size (i
n A) of the fuse is a function of the current which is drawn by what is conn
ected at the other end of the wire, isn=99t it?
>>
>>
>>
>> Otherwise you could put a 1A fuse to protect a #24 wire with a pitot heat
er at the end, and you would never see that heater working when you wanted i
t.
>>
>>
>>
>> With due respect
>>
>> Carlos
>>
>>
>>
>> De: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectr
ic-list-server@matronics.com] Em nome de Robert McCallum
>> Enviada: Monday, June 19, 2017 6:35 PM
>> Para: aeroelectric-list <aeroelectric-list@matronics.com>
>> Assunto: Re: AeroElectric-List: com dual PWR/GND on two fuses?
>>
>>
>>
>> Always bear in mind that the fuses are sized to protect the wire and what
is connected at the other end (in this case your radio) has no influence on
the fuse size used.
>>
>> As long as the wires are adequate for the 10 Amps then 10 Amp fuses are f
ine and certainly if the existing wiring will supply the new device's requir
ements then they may be reused/re-purposed.
>>
>> Bob McC
>>
>> ---------- Original Message ----------
>> From: Werner Schneider <glastar@gmx.net>
>> Date: June 16, 2017 at 5:20 PM
>>
>>
t>
>>
>> Hello,
>>
>> most avionics do have PWR and GND on two pins. My SL30 had even one used
>> for the NAV part (3A fused) and one for the COM part (5A fused).
>>
>> I have to replace it with a new 8.33, but just going for a COM right
>> now, that one has as well 2 pins each tied together, PWR onto a 10A fuse
>> (8W COM).
>>
>> Is there any disadvantage, if I use the existing cabling with the 2x
>> GND/PWR on extra fuses? Should I use 2x10A fuses (for a 8W com I found
>> the 10A a bit high).
>>
>> Thanks for your advice
>>
>> Cheers W-======================
===========
>>
>> >
>>
>
>
>
Virus-free. www.avast.com
Message 9
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Tosten grip wiring with car-relay for trim |
At 10:01 AM 6/20/2017, you wrote:
>
>Hello,
>
>I want to wire my new grip tosten with my basic 12v electrical
>actuating as trim (up/down) pulling a spring.
>
>I bought a double car relay to do some test to find the good wiring
>diagram but before that I prefer asking in this forum how can I wire
>it if anybody know the response ?
>
>Before I was a double pole switch, wire by the previous owner.
>
>I had a problem with the previous wiring, when i actuated my trim,
>my compas begin to turn completely. The motor/switch were not close
>to the compas.
>
>I have tested to set the motor very close to the compas to do a
>test. Without all the wire juste motor and a small battery. And in
>this case it don't turn ! I don't understand why.
It's difficult to diagnose the underlying
physics for your observations without first-
hand observation and diagnosis. I can tell
you that incidences of wiring
interfering with the compass is rare.
Suggest you get the new trim system installed
using the drawing cited below as guidance.
Then see if the compass is still getting
trashed . . . it will be easier to figure
out why it IS having problems than to
figure out why it is NOT having problems.
>I find this documentation to do my wire.
I think this wiring diagram is what you're
needing.
http://tinyurl.com/y7mwhg4t
Bob . . .
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|