? on wire bundle tie downs

[jimbo]

This has been bugging me and I am hoping I can get great advice from the electrical gurus out there.

The Aircraft Inspection and Repair Manual AC 43.13-1B in the electrical section says to secure wire/wire bundles every 2 foot max and that the max wire deflection should be no more than 1/2" between secure points when a slight pressure is applied 90 deg to the wire in midspan.

I know "adel" clamps are made for this purpose but sometimes these are a problem to bolt/screw on-maybe there is no access to the back side of the rib you are bolting it to and to install a nutplate may be difficult. Are there other ways I am missing? I have seen on bldrs web sites some use a nylon block type of device that a wire tie runs thru. This block is attached to the rib w/ adhesive backing. Not sure this is a good way as seems like the adhesive could dry out and come off. I am using rib as an example here but could be anything you are securing the wire to.

Are there simpler ways I am missing? And if there are special secure type fittings beside adel clamps where can you buy them?

Thanks,
Jim
RV9A Fuse

[ccrawford]

Couple of options I've found..

You can use the nylon blocks, though some folks like to secure them better than the sticky backing - either high strength glue or a pop rivet. I find the pop rivet gets in the way of the zip tie, but maybe I don't have small enough rivets.

Alternatively, you could use rivnuts for adel clamps. Kinda pricey, but don't require access to the back. Examples here:

http://www.aircraftspruce.com/catalo...es/rivnuts.php

[FlyingArcher]

Another option is to use Click-Bond products that are adhesive.

You'll find them at The Flight Shop, I think they advertise somewhere on this site.

I have purchased their wing-tip kit but not yet used it so I can't report on effectiveness, but if you search this forum you'll find a lot of happy customers

[erich weaver]

Hard to get simpler than the nylon block. Scrape off the sicky tape backing that is provided, clean the surfaces, and use a shoe-goo type adhesive. pretty cheap for the airplane world, and it aint coming loose.

erich

[az_gila]

...a pop rivet. The AZ heat can get to the sticky back mounts...

http://www.aircraftspruce.com/catalo...tiemounts1.php

The second one down will work for most of our small cables with a 1/8 pop type rivet.

[jimbo]

Gil....I haven't seen those up close. Didn't find them in the ACS catalog (maybe they are only in the online catalog). Those are what I am looking for.

Jim
RV9A fuse