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No mention of the legendary NASA cable lacing guide? https://workmanship.nasa.gov/lib/insp/2%20books/links/sections/401%20General%20Requirements.html https://wo

by seanc 4y ago

No mention of the legendary NASA cable lacing guide? https://workmanship.nasa.gov/lib/insp/2%20books/links/sections/401%20General%20Requirements.html https://workmanship.nasa.gov/lib/insp/2%20books/links/sectio...

luma 4y ago
> Some organizations have in-house standards to which cable lacing must conform, for example NASA specifies its cable lacing techniques in chapter 9 of NASA-STD-8739.4. It's right there in the article.
voxadam 4y ago
I'm sorry, I actually meant to include your link when I submitted this. NASA's wiring documents are beyond amazing.
ape4 4y ago
I am happy to know if any NASA spaceships are intercepted by aliens that they'll have good quality lacing to represent us.
- VLM 4y ago
  Good quality lacing means the craft will probably be working. The worst case scenario is a tangle of cables hanging all the tension on one individual cable then apply a nice 9 G load with vibration and it snaps. Also good lacing in minimal volume which means maximal cooling air flow in general.
  - nick123567 4y ago
    Depends on if you laced the wire that needs the most cooling deep in the center of the bundle...
  - cuSetanta 4y ago
    Its also important during the building process to keep the rats nest of wiring to a minimum, it can get fairly messy inside spacecraft. Then its also much easier to ensure cabled are kept apart from other signals that could interfere with them.
readingnews 4y ago
When I was a grad student in Physics I worked at an accelerator lab where we had an old NASA high voltage engineering unit. The control panel was completely laced, every wire had a marker on it every foot or so, every end was perfectly terminated. Being an electronics tech, it was a dream to work on this thing... Wish I had pictures. But as others have noted, it takes a great deal of time to do that right when you are installing.
digitailor 4y ago
In the author’s defense they mentioned the NASA standard, and that guide— while legendary— isn't a "lacing" guide. Of the 50+ images, only 2 show lacing (acceptable v. unacceptable), and the rest is spot tying, zip tying or other harnessing. Always nice to see the link though
Wistar 4y ago
See also this guide, reproduced from a book "Workmanship and Design Practices for Electronic Equipment", published by the direction of the chief of the Bureau of Naval Weapons, December, 1962. Included are some illustrations of jigs for creating laced wiring harnesses. https://www.dairiki.org/hammond/cable-lacing-howto/ https://www.dairiki.org/hammond/cable-lacing-howto/
nix23 4y ago
Ehhmm, thank you very much for the link!! Wow!
cuSetanta 4y ago
Use this and the other NASA workmanship guides all the time. A really great resource for building spacecraft.

by seanc 4y ago

luma 4y ago

> Some organizations have in-house standards to which cable lacing must conform, for example NASA specifies its cable lacing techniques in chapter 9 of NASA-STD-8739.4. It's right there in the article.

voxadam 4y ago

I'm sorry, I actually meant to include your link when I submitted this. NASA's wiring documents are beyond amazing.

ape4 4y ago

I am happy to know if any NASA spaceships are intercepted by aliens that they'll have good quality lacing to represent us.

VLM 4y ago
Good quality lacing means the craft will probably be working. The worst case scenario is a tangle of cables hanging all the tension on one individual cable then apply a nice 9 G load with vibration and it snaps. Also good lacing in minimal volume which means maximal cooling air flow in general.
- nick123567 4y ago
  Depends on if you laced the wire that needs the most cooling deep in the center of the bundle...
- cuSetanta 4y ago
  Its also important during the building process to keep the rats nest of wiring to a minimum, it can get fairly messy inside spacecraft. Then its also much easier to ensure cabled are kept apart from other signals that could interfere with them.

readingnews 4y ago

When I was a grad student in Physics I worked at an accelerator lab where we had an old NASA high voltage engineering unit. The control panel was completely laced, every wire had a marker on it every foot or so, every end was perfectly terminated. Being an electronics tech, it was a dream to work on this thing... Wish I had pictures. But as others have noted, it takes a great deal of time to do that right when you are installing.

digitailor 4y ago

In the author’s defense they mentioned the NASA standard, and that guide— while legendary— isn't a "lacing" guide. Of the 50+ images, only 2 show lacing (acceptable v. unacceptable), and the rest is spot tying, zip tying or other harnessing. Always nice to see the link though

Wistar 4y ago

See also this guide, reproduced from a book "Workmanship and Design Practices for Electronic Equipment", published by the direction of the chief of the Bureau of Naval Weapons, December, 1962. Included are some illustrations of jigs for creating laced wiring harnesses. https://www.dairiki.org/hammond/cable-lacing-howto/ https://www.dairiki.org/hammond/cable-lacing-howto/

nix23 4y ago

Ehhmm, thank you very much for the link!! Wow!

cuSetanta 4y ago

Use this and the other NASA workmanship guides all the time. A really great resource for building spacecraft.