Firewall sealling Question

[38flattie]

I need to run electrical, a fuel shut off cable, and a fire suppression cable through the firewall.

How is the best way to seal the firewall? Grommets, fireproof caulk, or some device that I'm unaware of?

Thanks in advance!

[Tman]

Here you go, recent thread.

http://www.landracing.com/forum/index.php/topic,9590.0.html

[jimmy six]

There are very good electrical "strain reliefs" that are great for firewall penatrations. They are available in aluminum and steel (don't use plastic for obvious reasons). In a fire, air movement is your enemy. With the air sealed by the expansion of the gromet around your wire cable or actuation cable no air will get to you in your drivers compartment.

I have found that a single multiconductor cable works great for all the electrical connections in my engine compartment. Lay out a print of what you need and then get the proper conductor cable. I always use one with more wires than I need. Inside the drivers comparment is a terminal board for ease of trouble shooting. There are some multicolor multiconductor cables with high temp jackets and teflon insulated wire that work well. Good Luck

[38flattie]

Thanks guys! I just wasn't sure that the strain reliefs with the rubber grommets were going to pass tech.

Thanks again!

[jimmy six]

If you get the correct ones they have a steel "ring" which does the pushing onto the grommet so the rubber does not get crushed by the part you are turning. If you get the correct size for your cable the "ring" will be just larger than the diameter of the cable so it is very safe.

I have been involved with many electrical fires and never saw a rubber crush gronnet melted. Like I said above, air flowing by it causes the burning. and with the sealing around the cable there is no way for it to burn. You could always put some fire stop putty over the "ring" area if a complaint was made. I always carry some in my trailer......Good Luck

[38flattie]

Thanks Jimmy!