Topic: Mining disaster with 34 L3+ ASICs, need some serious help!!!! (Read 2745 times)

Did you ever figure this out? What was the outcome? Any lessons learned which you could share? Thanks.

A qualified, licensed electrician has been with me from the start of this project and has wired everything I have in my attic. He also made me some custom cords that I’m using for the temporary garage setup. He’s seen everything I’m doing in my home (as have two more electricians that work under him). I get my information from them.
Average temp in the attic very much depends on the weather outside. In the beginning, before I had my radiant barrier up and when the weather was hotter, it would get toasty up there. Uncomfortable to be up there for any amount of time. Now it’s much better, pleasant in fact. I’d estimate 70-75 degrees.

Whats the average temp in your room?

Keep in mind that your setup would certainly not be considered hobby but commercial, and i seriously doubt you have the proper insurance for that. 

Where are you getting this information that 80% is conservative? There are many factors at play, it's not just about leaving your breaker door open. You should definitely talk to a qualified electrician about your setup, your flippant attitude is incredibly irresponsible.

I am aware of the “80% load” rule of thumb, but in reality this is very conservative. A brand new breaker switch can probably sustain 100% of its rated current (or more) especially if there is some airflow in the breaker box. I leave my door open with a fan on it. The other day I noticed my attic (100 amp service) was pulling 99.x amps and probably had been doing so all day. That’s a bit close to the line for me so I moved one machine to the house circuit, but now I run in the low to mid 90s up there and I’m perfectly comfortable with that.

I was going to say internet/switch but glad you found the problem.

200 AMP service doesn't mean 200 CONTINUOUS Amps. For continuous you should use 80% or 160 Amps maximum. Your electrician didn't mention anything like this?

Incidentally, the D3 is not nearly as overclockable. At the very best I can get 20 MH/s, which is only 15% over stock. And most machines can’t reach 20.

It was definitely a lack of internet connection that caused the problem. It was the red “fault” light that made me think it was something electrical, however if you test this at home, you’ll see this does indeed light up if you lack an internet connection. I would have figured this out but when I got home from work the wife and kids were waiting in the car, ready to leave town, so I had essentially no time to troubleshoot. So instead I churned with worry all weekend long, imagining the worst. I did begin to think it was the router towards the end of the weekend (it was the only common denominator) so it was such a relief to get home and see that router off.

With regards to overclocking, there is absolutely no doubt you can safely overclock 5-10%, or be like me and push the envelope a bit and go for 20-25%. I’ve been doing this successfully for months now with no ill effects, in a hotish attic no less. When you have lots of machines you will notice that some are more overclockable than others, due of course to the silicon lottery. Some machines will barely take a frequency of 425M, and others can approach 500M. Here are some numbers I’ve gathered. Take this with a grain of salt as these numbers came from just one machine.

384M - 504 MH - 810w
400M - 520 MH - 845w
425M - 555 MH - 905w
437M - 572 MH - 935w
450M - 590 MH - 965w
475M - 620 MH - 1020w
481M - 630 MH - 1065w
487M - 635 MH - 1070w

When you start approaching the limits of a particular machine, you will notice hardware errors accumulate very fast and your real time hashrate will be higher than your average. For me, when the difference is more than 20 MH/s, that’s the limit. I have some machines that can hash at 650+ MH/s.

how much you oc the l3+? 600 MH/s?
i think 8-10% are OK? or not? 540-550 Mh/s

nevertheless, I told you guys not to OC these devices, I've burnt a couple of them by OC'ing and playing around with frequency. Now they're all XXX XXX
and no way back.

so be careful pls - a friendly advice.

First, most of the comments or reply you had here are stupid, second, if the circuit breakers were not tripped then it might be related to Brownout, if there was a short circuit then the circuit breaker would trip and the same goes to overload, Brownout mean that not enough electricity for all your asics is coming from the energy transformers but that would randomly turn off some machines and let others to be still working if there are 3 phase power. Brownout don't trip circuit breakers and damage a lot if it keeps trying to make the asics to work. You should have got a power monitor that trips the circuit breaker if not enough electricity is coming to your house. Brownout are bad for electronics in general.

If no internet then the reason why the red lights and why they were not working by the way, you should read about Brownout.

20% overload is hazard 

yes i'm wondering the same

I am glad you were able to fix this problem! Could you tell me how the OC is working for your L3s and what frequency you have them set to?

Stubby, I think bitcoin9999 at least deserves one day of your mining redirected to his wallet! hahaha

I'm glad it's working, I can only imagine how bad you felt when you arrived home and $70k+ of equipments were out of work.

lol  20% OC

Good to hear!

YES. Such a relief.

 So it was a very minor problem.  Good news for sure.