Electrical penetration of the firewall

[Bryan Cotton]

Thanks David! I just placed an order for that part.

[Bryan Cotton]

Here is my cheap penetration installed. I have enough spare firesleeve to seal it up.

Inside:

[Bryan Cotton]

One thing I forgot to mention - if you put the fitting in like I did, it protects the wires from the edge of the firewall. I was going to install it like in Ryan's picture and then I had an epiphany.

[Rynoth]

One thing I forgot to mention - if you put the fitting in like I did, it protects the wires from the edge of the firewall. I was going to install it like in Ryan's picture and then I had an epiphany.

I like your solution!

For what it's worth, in the ACS kit installation, the wires are protected from any firewall/metal edge contact by wrapping the wires in some of the fireproof sleeve passed through the fitting itself. Besides protecting the wires from chafing, I assume this also helps to make a better fireproof seal on the engine-compartment side (more meat for the full sleeve to clamp onto.) It was done by taking the sleeve and cutting down the middle of it lengthwise to make it a smaller diameter to stick through the opening. You might consider using the same method even in your install. Here's some pics:








You can see in the bottom picture that the outer sleeve is wrapped around the inner sleeve which is wrapped around the wires.

[Bryan Cotton]

Ryan,
I will do that, thanks.

[n307tw]

Bryan,

That looks great, just found out I have to make another penetration in my firewall for all the sensors for the Aerovee Turbo. Garmin doesn't approve of their engine monitor being installed in the engine compartment so I have to bring all those wires into the cabin. I will be doing the cheaper option for this penetration on this one for sure. Both your and Ryan's came out great.

-Tim

[GordonTurner]

That’s a lot of orange. Bryan, what was your favorite color again?

Gordon

[GordonTurner]

Hi Bryan

Question about your fire wall seeling. It appears you are seeling both the engine side and the cockpit side of each fastener with rtv. I’m sure the protocol for firewalls is spelled out somewhere, do you happen to have an informative but still readable source?

Thanks, Gordon

[Rynoth]

Hi Gordon, I assume you're referring to my pictures above. I actually only did one side of most fasteners, it's just that I didn't seal the nutplates until they were installed and only really had access from the inside of the firewall since the attached accessories were in the way. Didn't follow any real guidance other than just trying to make sure every hole I made in the firewall was made airtight with sealant.

And yes, I like orange. It was a big tube of sealant and I have fat fingers.

[GordonTurner]

Ok. Thanks for all the info, more to think about as I creep up on the firewall forward part of the project.