Ed.
Hi Guys,
I am reading slightly conflicting stuff...
If i have my wiring in that convoluted tube stuff which is then wrapped with leccy tape, is it ok to attach this to my chassis rails with cable ties?
I would not be using sticky fixers but going round the entire rail with the cable ties.
Cheers,
andy
My understanding is no.
They need to be held to the chassis with proper fixings and just sticky is not enough they need to be permanent like screwed or riveted.
It's about using "production" methods I think and cable ties to the chassis aren't it.
Apart from not looking great imho
What are the other opinions?
P clips, Nutserts and the wiggly tube although someone will undoubtedly say that putting Nutserts into a tube drastically reduces the strength of the tube. Did mine this way and passed SVA no problem.
I can pass no comment on the requirments of IVA, although I can asure you that while the sticky back bases are awfull, there are plenty of companies
using cable ties in production... (not really helpfully but its all ive got).
Daniel
I agree with Mike - I only use nutserts when I have to, in non, structural ways.
Another way is to use a self-tapping screw with the sticky pads. At least you're replacing metal with metal.
If you're a place in your build when you can weld to the chassis, take a look at this
linkthis link to see how I decided to do it;
brackets welded to the chassis, followed by p-clips to hold whatever.
Also, use the plastic shielding that's like slit black plastic conduit to keep everything inside, suspended every 12". I also used
cable-ties every 6" to keep it tidy.
what's more, steer away from electricians tape; it's not designed for the heat and moisture of an engine bay and when the adhesive starts to
melt it will clag everything up and not support it properly. Back in the day, electricians tape is totally a fail.
I used these type of cable ties bases, and fixed them to the chassis using a self tapping screw. Much quicker than rivnuts, and passed SVA no
problem. Sticky pads would work just as well, but need to be screwed to the chassis or they'll fall off within a few months and you'll have
rattles everywhere! (in my experience).
Ed.
Loom in split, convoluted tubing, wrapped in tape, then I used these...
riveted to the chassis rails at appropriate intervals.
Typical IVA nonsense, you could argue that drilling the chassis every 6 " just to hold cables up could affect the structural rigidity
of the tubes, and allow water in over time causing internal corrosion.
Cable ties might not look proper but they do the job without the need for drilling holes.
Have a look under any TVR, i think they must have had shares in a cable tie company 
If your building from scratch i suppose the best way would be to weld on bits of tube for the loom and pipes to pass through.
Al.
If you read the post guys he is asking if it is OK to put cable ties around the whole rail not through any sort of fixings.
From my IVA experience I cannot see a problem. Mine had some rivetted cable tie clips and some ties completely around the rail and the tester was OK
with that.
JB
quote:
Originally posted by FuryRebuild...another way is to use a self-tapping screw with the sticky pads. At least you're replacing metal with metal.
Speaking as a structural engineer, I would not like any fixing into slender structural members in a space frame chassis without using doublers or some
other method of maintaining the full section capacity. I can't see any issue with cable ties around a chassis member.
For a member that relies on its section properties to resist buckling, bending or tension, a self-tapper does not "replace metal with
metal"! It makes a hole, which even if no material is lost from the section, makes a stress raiser at the very least.
Cheers R
Looks like my car is going to buckle all around me as I have used Nutserts extensively then.
I decieded to to rivnuts, but went for the smallest I could (5mm hole, m3 thread) which meant tiny fixings but looks nice and neat. Used stainess
rubber lined Pclips for the brake lines, and 20mm plastic pclips for the electrical tubing which is unsplit.
By the way, and you probably know this already, you will have to change your mounting bolts for your shockers as the Nylok plastiv insert isnt gripping on any thread. If you havent been through IVA yet I have heard that some testers insist on three threads showing outside the nut as well.
quote:
Originally posted by myke pocock
By the way, and you probably know this already, you will have to change your mounting bolts for your shockers as the Nylok plastiv insert isnt gripping on any thread. If you havent been through IVA yet I have heard that some testers insist on three threads showing outside the nut as well.
I can't see why a cable tie through a base that's then bolted to the chassis is any better than a cable tie directly round the chassis rail??
quote:
Originally posted by The Black Flash
I can't see why a cable tie through a base that's then bolted to the chassis is any better than a cable tie directly round the chassis rail??
^ and possibly the cable ties all working their way down to the lowest point on an angled tube, leaving none at the top (whick, ok, is very
unlikely!)
i'm 'lucky' in that very few of my chassis tubes have any panelling or anythis attached to them, and they're all round tube, so
i've got rubber lined P clips round the chassis, and then a smaller one holding whatever needs secured
Description
wiring's not in yet, but its how the wiring will be held in mine when it's done. the only holes getting drilled with be in sheet metal
panels. no way i'm risking water getting insode my chassis tubes, although some tie wrap bases have already been pyut in by the last owner of the
chassis, so i'll use them if they're already there, but not adding any more
with a bit of work, and a bit of squishing, a carefully chosen metal P clip chould be shaped to fit round a square tube i should think
[Edited on 28/8/12 by blakep82]
quote:
Originally posted by loggyboy
quote:
Originally posted by The Black Flash
I can't see why a cable tie through a base that's then bolted to the chassis is any better than a cable tie directly round the chassis rail??
I would assume its the fact that the if its around the whole chassis theres nothing to stop tyhe cables working their way around each face of the tube.
So........
IVA is 'looming' so should i stick with how my cables are secured now or should i go and get a load of stupid P clips to secure it for the
IVA man?
quote:
Originally posted by pekwah1
So........
IVA is 'looming' so should i stick with how my cables are secured now or should i go and get a load of stupid P clips to secure it for the IVA man?
Perhaps it may be worth a call (or visit) to your IVA man to ask his advice if he is prepared to comment?
What was the outcome of this? Are cable ties around the chassis sufficient?