Topic: Bitmain's Released Antminer S9, World's First 16nm Miner Ready to Order - page 282. (Read 531168 times)

Must you really.......

Hospital-Grade Requirements in North America



North American NEMA 5-15 gray, black, and clear plugs.
Hospital-Grade Standards Hospital-grade plugs, sockets, and cable mount connectors are subject to special requirements contained in the following standards: Medical equipment standards—UL 60601-1 and CAN/CSA C22.2 no. 21; Power supply cord standards— UL 817 and CAN/CSA C22.2 no. 21; and Attachment plug and receptacle standards—UL 498 and CAN/CSA C22.2 no. 42. The hospital-grade plug diameter conforms to NEMA WD-6 and UL 817 standards: (1) the blades must be solid instead of folded brass, (2) the blades are usually nickel-plated, (3) the plug includes an internal cable retention device or strain relief to prevent any stress to the plug’s internal connections and (4) NEMA plug and receptacle are marked “Hospital-grade” and with a green dot

Which mine are hospital grade "Marked" with the green dot right out of the package. anything else you want to say.

20 amp NEMA 5 sockets are NOT standard in U.S. homes and most businesses, though they're more frequently found in shop/industrial type business locations.

 You will find exceptions SOMETIMES in newer homes or homes that have upgraded wiring, used mostly for medium-sized window A/C units and washers, or sometimes in garages/shop areas.

 You'll also find occasional NEMA 6 220v series sockets, usually intended for use with electric driers, electric hot water heaters, or large (most 25,000 BTU and up) window A/C units.

The STANDARD is a NEMA 5-15 dual socket for almost ALL outlets in the large marjority of US homes.



 Most of the power connectors I've seen in the pair of hospitals I've been in this year were GFI NEMA 5-20.

 This is not a "hospital grade" connector as such, GFI is specified for any location that wetness or other higher risk of shock hazards can be found, though that "higher risk" issue is why pretty much all line-powered medical equipment specifies connection to a GCI-equipped circuit and therefore that type of outlet is the norm in most areas of a hospital.



 

set up us all your coin

Bitcoin is a proof of work blockchain, so yes the network needs miners

I never said they were 30 amp connectors they are 20 amps I should now I put them on and the 10 gauge wire I always like to be on the safe side.

standard sockets that electricians put in are 20 amp sockets or 15 amp depending on the service. these sockets are not made to run 20 amps continually for 24/7 they will burn. Hospital,industrial or commercial grade are they are put through rigorous testing surge current temp the whole nine yards they are built to take it.

Same thing goes for the plugs to. Very expensive though wish I new a link I can get them for cheap.

Actually, I tend to agree with you.  Suspect the math is just a fluke.

Regarding using "Hospital grade" connectors - your key was in using 10 gauge wire - the standard for 30 amp circuits.  Of course if you use 30 amp wiring with 30 amp connectors and 30 amp breakers you can pull more current than if any of those are 20 amp components...

While it is certainly possible that Bitmain produce the  B6 "lower power/hash" S9 to accommodate USA 120V users, my bet its that they have much better yields, and much better working hardware at the lower hashrate. I think the lower power draw is just a side benefit (and not the actual reason). It's quite likely that a Batch6 S9 is a set of blades that don't really make the grade as a Batch7 at 12.93TH. You could look at a Batch6 as a "low grade" Batch7, with a price break to match.

Kinda like the way Intel "speed grades" their various processors.

Do the math, look at the specs...  an 11.85Th Batch 6 unit draws 1172W plus 12%, or 1313 watts.  Push that to 12.93Th and the spec is 1275W plus 7% or 1364 watts, over the 1320 safe limit.

Here is what is at my wall........


https://s32.postimg.org/wtna3hz2t/PIC1.png


Can be run over 1760 you just better make sure you have hospital grade sockets and plugs on your extension cords. also make sure it is 10 gauge or thicker and everything will work fine as you can see been running it for over a week no burnt plugs or anything. I was getting that problem until I upgraded as mentioned above.

I have one S9 running and one S7-"ONE BOARD ONLY".  No fires running for a week works well as long as you upgrade your ac plugs and sockets to hospital grade. standard sockets and plugs will burn up !

And lets not forget that code (at least in commercial situations) is that breakers should not be loaded to more than 80% of their capacity on a continuous basis.  So a 20 amp, 110V circuit (typically using 12 gauge wire) should not have more than 1760 watts of continuous load.  Basically one S4/s7/s9 per 20 amp circuit.  That limit is 1320 watts if your running with a 15 amp breaker (and typically 14 gauge wire).  E.g.  Your really pushing your circuits if your running an S9 at over 11.83THs.   Maybe that is why they came out with that box?  So it would, barely, fit on a typical US home circuit?

 The BREAKER might be rated at 20 amps,  but most common house 110V SOCKETS are rated at 15 amps (and I believe that applies to BOTH sockets combined on a typical dual-socket outlet).

 Keep in mind that a breaker can have MANY outlets on it.


 Also, breakers derate with heat - if you don't run AC in the room your breaker box is in, it's not uncommon for the breakers to start tripping at a fair bit lower than their RATED capasity - especially if you have any of the "2 circuits on one breaker" type breakers, those things overheat if you look at them funny.

 Last place I was in was running a QO box - the 15 AMP rated 2-in-one-slot breakers on some of my mining circuits were typically tripping at 10 AMPS or so actual draw (appx. 1KW "at the wall" A2 Mega Terminators) if the outside ambient got over 90F (inside in that room ran 4-5 degrees hotter). This was on a breaker RATED for 104F (40C, which is the NORM for every breaker I've ever seen).

 I'm not sure if the actual outlet has to be derated for temperature.
 Wire does derate, but that's already taken into account in the NEMA code wire size guides on a quite conservative basis.

difficult is inconceivable

lol, you guys are killing me please stop , gotta feel bad for that guy though 50% in earnings gone in a day and he did not see it coming bad deal

lol

you cannot stop difficult

i think its funny that people are STILL buying these s9's at the price they have listed. AFTER HALVING these miners will take about a year to ROI....how can anyone expect a year out of these machines when so many are having issues getting a couple of weeks worth of mining time out of them!?!?!. hell the early adopters got a miner that was supposed to mine at 14.xx th/s only to find out they wont be stable at those speeds for very long if at all. people had dead s9's just show up at their door....dead right out of the box! ROI should be 6 months all the way up to about 200 days max. not a year+. please people.....stop buying these things and show bitmain they need to revise their design a bit and provide a more stable and profitable miner. if you keep buying them the price will stay high and you wont ever make your money back unless the price soars to the moon and back which you shouldn't base your investment on those kinds of numbers....only base it on the numbers we know right now.


also im confused about this guy talking about 1000w ac in not being able to produce 2000w dc out....a typical house uses 10/15a breakers in its rooms. older houses use 10a while newer ones have larger ones. my house has 20a breakers for all the 110v sockets so im one of the lucky ones. at 20a i can push about 2300w dc. i can go higher but its unsafe to make out the line 24/7 so its always good to leave some room in there. a good rule of thumb is 1 s7 per breaker at full speed. where i mine i have 6 breakers dedicated to 1 room and another 5 dedicated to the second room and 1 miner is on each breaker. the higher the input voltage the more watts that can be pulled from the plug so if you have 110v ac power you can pull a max of about 2400w give or take a few watts either way for tolerances when making these. if you jack the voltage up to 220v using the very same wires the only difference is the wall socket and the breaker (double slot breaker instead of single slot one since im in the us) then you can top out the wattage at around 4500w safely.....thats using the very same gauge wires the 110v uses.

now if hes saying that his ac breaker tops out at around 1000 watts then maybe he means he has a 10a breaker and that's all he is able to push through it so if that's the case then he is 100% correct....he WILL NOT be able to push 2000w dc through a 10a ac breaker period. anyone that argues that you can do this on a stock unmodded electrical connection is wrong and should read up on how this works a little bit before posting about electricity again. Anyone that is able to push that many watts through a 10a 110v ac line should stop doing it right away otherwise be ready for your house/mining location to burn down.....make sure u have insurance too.

if the guy is saying the later he is 100% correct and you all should say sorry to him and you all that say your electricians should go back to school because its you that is wrong. im no cert electrician so im more of a hobbyist but my step father does electrical work and has since i was a young child and i have always been into watching him do his thing and learning from his vast pool of knowledge. that coupled with real world experience from trial and error type stuff makes me confident in saying what i mentioned above is correct. lets hope steve was referring to the later and not the first part.   

But not 100%.  It is technically impossible.

what's funny? everyone knows it is difficult to increase...

You would be surprised but many new miners have no idea what difficulty or halving means. Some don't even realize how much power a miner can consume.

Why do you think there are Antminers S3 going for $100-200. People think it makes $0.50/per day/until eternity.