Return-Path: Received: from ddi.digital.net ([198.69.104.2]) by truman.olsusa.com (Post.Office MTA v3.1.2 release (PO203-101c) ID# 0-44819U2500L250S0) with ESMTP id AAA16060 for ; Sun, 20 Sep 1998 15:34:26 -0400 Received: from john (max-roc6-30.digital.net [208.14.38.30]) by ddi.digital.net (8.9.1/8.9.1) with SMTP id PAA19667 for ; Sun, 20 Sep 1998 15:34:18 -0400 (EDT) Message-Id: <3.0.3.32.19980920150726.030e76bc@mail.digital.net> Date: Sun, 20 Sep 1998 15:07:26 -0400 To: lancair.list@olsusa.com From: John Cooper Subject: current carrying bolts X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> I'm with Scott Dahlgren, here. Forget the bolts through the firewall. On my L-235/290, I used a hole saw to drill a couple of 3/4" holes throught the firewall/fire-barrier in the appropriated places. Then I floxed in a length of .750x.035 Al tubing which protruded front and back by 1/8" for sealing with RTV. Then I simply passed the big conductors thru the firewall and sealed the annular space with RTV. (One must be careful to use a type of lug which will pass thru the Al feed-through). This saves not only weight, but two bolted joints with their inherent resistance which are subject to corrosion and loosening over time. Should you ever need to remove the cable, it would be a simple matter to dig out the RTV sealant. If you don't like the Aluminum tube method, grommets will work fine, too.