Matronics Email Lists Forum Index Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
 
 Get Email Distribution Too!Get Email Distribution Too!    FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

FOT Hardware

 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> AeroElectric-List
View previous topic :: View next topic  
Author Message
phapp(at)yhpb.com
Guest





PostPosted: Tue Apr 23, 2019 3:54 am    Post subject: FOT Hardware Reply with quote

Hi,

I have B&C's FOT on my RV-8 firewall. It comes with brass hardware. 
However I need a longer bolt for the thickness of the connectors for the standard battery and engine grounds. In AC 43.13-1B (11-76  11-79) I see  very specific material types called out for bonding connection hardware.
Question is,  do I need to stick with brass or can I go with the standard cadmium plated AN hardware we use everywhere else in our homebuilts?  If Bob suggests brass, what's a good supplier?


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
Kellym



Joined: 10 Jan 2006
Posts: 1700
Location: Sun Lakes AZ

PostPosted: Tue Apr 23, 2019 4:15 am    Post subject: FOT Hardware Reply with quote

With large current connectors, such as battery ground and engine ground
you do NOT need to connect to the FOT. Connect to any bolt going through
the firewall and you will be fine. The FOT grounds are for avionics that
are low current, prone to ground loops etc. Your high current
connections are fine using the metal airframe for ground. AN hardware is
also fine for those connections. If you try to stack those large
connectors all together with the bolt going through your FOT you are
asking for something not connecting well. On my RV-10 Vans has the
engine ground using the engine mount firewall bolts as the engine ground
connection. Maybe not ideal, but it works.

On 4/23/2019 4:52 AM, Paul Happ wrote:
Quote:
Hi,

I have B&C's FOT on my RV-8 firewall. It comes with brass hardware.

However I need a longer bolt for the thickness of the connectors for the
standard battery and engine grounds. In AC 43.13-1B (11-76  11-79) I
see  very specific material types called out for bonding connection
hardware.

Question is,  do I need to stick with brass or can I go with the
standard cadmium plated AN hardware we use everywhere else in our
homebuilts?  If Bob suggests brass, what's a good supplier?




- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD
Back to top
View user's profile Send private message
ceengland7(at)gmail.com
Guest





PostPosted: Tue Apr 23, 2019 4:43 am    Post subject: FOT Hardware Reply with quote

What diameter are the B&C bolts? I made my own FOT using a brass blank switchplate & tabs from an electronic supplier, and for the bolt, I used a 5/16" brass bolt soldered to the plate. The bolts are available in pairs, complete with brass nuts, from your local hardware store or big box store. You just need to look in an unconventional area to find them. Smile
https://www.google.com/search?q=toilet+hold+down+bolts&oq=toilet+hold+down+bolts&aqs=chrome.0.0l6.8822j0j7&sourceid=chrome&ie=UTF-8 
Charlie 

Virus-free. www.avast.com [url=#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2][/url]

On Tue, Apr 23, 2019 at 6:58 AM Paul Happ <phapp(at)yhpb.com (phapp(at)yhpb.com)> wrote:

Quote:
Hi,

I have B&C's FOT on my RV-8 firewall. It comes with brass hardware. 
However I need a longer bolt for the thickness of the connectors for the standard battery and engine grounds. In AC 43.13-1B (11-76  11-79) I see  very specific material types called out for bonding connection hardware.
Question is,  do I need to stick with brass or can I go with the standard cadmium plated AN hardware we use everywhere else in our homebuilts?  If Bob suggests brass, what's a good supplier?



- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
kenryan



Joined: 20 Oct 2009
Posts: 423

PostPosted: Tue Apr 23, 2019 7:34 am    Post subject: FOT Hardware Reply with quote

Please remind me, what is FOT?

On Tue, Apr 23, 2019, 04:20 Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)> wrote:

Quote:
--> AeroElectric-List message posted by: Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)>

With large current connectors, such as battery ground and engine ground
you do NOT need to connect to the FOT. Connect to any bolt going through
the firewall and you will be fine. The FOT grounds are for avionics that
are low current, prone to ground loops etc. Your high current
connections are fine using the metal airframe for ground. AN hardware is
also fine for those connections. If you try to stack those large
connectors all together with the bolt going through your FOT you are
asking for something not connecting well. On my RV-10 Vans has the
engine ground using the engine mount firewall bolts as the engine ground
connection. Maybe not ideal, but it works.

On 4/23/2019 4:52 AM, Paul Happ wrote:
> Hi,
>
> I have B&C's FOT on my RV-8 firewall. It comes with brass hardware.
>
> However I need a longer bolt for the thickness of the connectors for the
> standard battery and engine grounds. In AC 43.13-1B (11-76  11-79) I
> see  very specific material types called out for bonding connection
> hardware.
>
> Question is,  do I need to stick with brass or can I go with the
> standard cadmium plated AN hardware we use everywhere else in our
> homebuilts?  If Bob suggests brass, what's a good supplier?
>
>
===========
-
Electric-List" rel="noreferrer noreferrer" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List
===========
FORUMS -
eferrer noreferrer" target="_blank">http://forums.matronics.com
===========
WIKI -
errer noreferrer" target="_blank">http://wiki.matronics.com
===========
b Site -
          -Matt Dralle, List Admin.
rel="noreferrer noreferrer" target="_blank">http://www.matronics.com/contribution
===========





- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
View user's profile Send private message
art(at)zemon.name
Guest





PostPosted: Tue Apr 23, 2019 8:50 am    Post subject: FOT Hardware Reply with quote

forest of tabs


On Tue, Apr 23, 2019 at 10:51 AM Ken Ryan <keninalaska(at)gmail.com (keninalaska(at)gmail.com)> wrote:

Quote:
Please remind me, what is FOT?

--
https://CheerfulCurmudgeon.com/"Love wins. Love always wins." Morrie Schwartz


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
bobnoffs



Joined: 04 Jul 2012
Posts: 132
Location: northern wi.

PostPosted: Tue Apr 23, 2019 1:54 pm    Post subject: FOT Hardware Reply with quote

forest of tabs

On Tue, Apr 23, 2019 at 11:54 AM Art Zemon <art(at)zemon.name (art(at)zemon.name)> wrote:

Quote:
forest of tabs


On Tue, Apr 23, 2019 at 10:51 AM Ken Ryan <keninalaska(at)gmail.com (keninalaska(at)gmail.com)> wrote:

Quote:
Please remind me, what is FOT?

--
https://CheerfulCurmudgeon.com/"Love wins. Love always wins." Morrie Schwartz



- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
View user's profile Send private message Send e-mail
Display posts from previous:   
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> AeroElectric-List All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group