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My Home Fibre Network Disintegrated

alienchow.dev

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Re: My Home Fibre Network Disintegrated

#161

Post by sgarland »

angry_octet wrote: post #148
alienchow wrote: post #42

Earlier quoted context omitted.

I do have PVC conduits under the flooring. You can see the photos here: https://alienchow.dev/post/homelab1/ In theory I can pull a new cable through. But practically it might be tough due to the number of bends (shelter -> wall -> vent -> ceiling -> wall -> floor -> room). In the worst case scenario I can give it a try, but it's probably going to destroy the new fibre cable when I pull it through. For now the connec…

That's why they invented cable lube. That number of turns is no obstacle, even with existing cables. But you should also have a pull cord spool.

To anyone reading this and assuming it applies equally to electrical conduit, it does not, which is why the NEC specs a maximum of four 90 degree bends between pull points. You could probably manage five, as was described, but it is technically disallowed (again, for electrical wiring - the NEC doesn’t care about networking).

Re: My Home Fibre Network Disintegrated

#162

Post by alienchow »

Thanks HN folks for all the comments. To clarify a bit, the cables are pulled through PVC conduits under the flooring before being buried in cement. Currently the hypotheses for why the cable disintegrated so quickly is hydrolysis and paint solvents. Singapore is extremely humid but this doesn't explain why the exposed cabling on the other end is still healthy and not crumbly.

The second possibility is that I keep the leftover wall paints (Nippon Paint Vinilex 5000) in the same room and have noticed that much of the solvents have evaporated. It is possible that the solvents in the air might have caused the cable to fail in 3 years. It would explain why the other ends that aren't exposed to the air inside the bomb shelter aren't falling apart.

Some other learnings from this. Buried cabling should always be permanently fixed and attached to a patch panel instead of dangling in the open. That was the original plan but I figured it wouldn’t be an issue. I was wrong. Always measure exact length of buried fibre cabling as they aren’t meant to be stored in loops.

Re: My Home Fibre Network Disintegrated

#163

Post by voxlax »

I believe, he might have stored some solvent in the vicinity of the cable. Anyway it won't affect the optical performance of the cables. It's just the loss of mechanical protection. The disintegrating sheathing could be repaired by shrink tubing, which is more convenient than by wrapping it up in tape.

Re: My Home Fibre Network Disintegrated

#164

Post by voxlax »

alienchow wrote: post #162

Thanks HN folks for all the comments. To clarify a bit, the cables are pulled through PVC conduits under the flooring before being buried in cement. Currently the hypotheses for why the cable disintegrated so quickly is hydrolysis and paint solvents. Singapore is extremely humid but this doesn't explain why the exposed cabling on the other end is still healthy and not crumbly. The second possibility is that I keep th…

Oh, sry! Your comment came after I posted mine. I had similar experience with a bottle of organic thinner for paints.

Re: My Home Fibre Network Disintegrated

#165

Post by fried-gluttony »

adinisom wrote: post #103
alienchow wrote: post #95

Earlier quoted context omitted.

Hey actually I didn't know! It's my very first time dealing with fibre networking so I just maxed out the supposed durability specs. I figured I'd rather go overkill than regret not having done so. Ironic I know. Unfortunately I can't easily dig the cable out and bury it again in this case. I'll have to figure out how to pull a new cable using the existing cable through the PVC conduits as the cable shares a larger c…

If you want to pull another cable: - secure a string to the old cable - pull the cable out the other end, pulling the string through - secure the string to the new cable - pull the string out the other end, pulling the new cable into position

Excuse me to hijack this comment adinisom.

I wanted to reach you regarding your comment here: https://news.ycombinator.com/item?id=44547866 Would you be willing to maybe elaborate on the problems caused - I've planned to adopt Miro Sameks for an application? DM me via my about me, if interested. Would be very thankful.

Re: My Home Fibre Network Disintegrated

#166

Post by layla5alive »

EvanAnderson wrote: post #117
ZeroConcerns wrote: post #96

There's no link to the data sheet of the actual cable, but, yeah, looks like this should not have happened in such a short timeframe unless there's something really funny going on in that room, like ambient temperatures above 50 degC. Another thing that should not have happened is installing the cable in loops in this way: any 'building' or 'underground' type cable needs to be of the exact length required at the dema…

> Another thing that should not have happened is installing the cable in loops in this way: any 'building' or 'underground' type cable needs to be of the exact length required at the demarcation point... This hasn't been my experience with fiber entrance cables terminated by ILECs, Spectrum, and Lumen. They typically leave a significant service loop bound to the cable ladder or backer board-- usually 15-20 feet.

I have a > 75ft service loop on a 48-count underground burial fiber from the street.

Re: My Home Fibre Network Disintegrated

#167

Post by Forgeties79 »

chneu wrote: post #56
russdill wrote: post #4

If you buy a consumer product labeled "military grade" you are buying snake oil. And not just snake oil, incredibly over priced snake oil.

Basically same with any company with "Patriot" or "Veteran" in the name. It's just a weak pander to people's weak egos. Freedumb, if you will.

I don’t disagree but it’s not hard to understand why people think “military grade” means it’s better. “Military grade” communicates tough/durable/stress tested to a lot of people. Veteran/patriot isn’t an indicator of build quality, even if it is also pandering to a certain sensibility.

Re: My Home Fibre Network Disintegrated

#169

Post by lima »

mixologic wrote: post #36
alienchow wrote: post #6

Earlier quoted context omitted.

I'm not sure either. It's not an air tight bomb shelter and it's used like an average storeroom, storing stuff like winter jackets, suitcases and paint. I do use small amounts of Calcium Chloride based dessicants to keep the room dry.

Have you checked for Radon?

Radon and its progenitors won't produce nearly enough radiation to damage plastics like that at naturally occurring levels.

Re: My Home Fibre Network Disintegrated

#170

Post by lima »

bluGill wrote: post #139
VanTheBrand wrote: post #92

Earlier quoted context omitted.

Radon is radioactive. The alpha particles it emits can break down polymers and degrade plastics.

Interseting - I have high radon (mitigeted in the house via a fan), if I burry fibre what will I need to do to get something that will work? I have an outbuilding that I want to give internet.

No, radiation from radon at naturally occurring levels won't cause any damage to plastics.
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