ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH

[d57heinz]

Well, I guess my farm is defying all logic then.
I'm certainly pulling in over 200A total - all using 120V.

I'll post this to you again.  You may not have read it:

Say we had a 200 AMP Main Service Panel and every circuit was 240V circuits by using 2 pole breakers...  If every circuit was used at it's max [Not recommended if circuits are inside walls and/or conduit], you could have 10 x 20 amp / 240 Volt circuits for a total of 48,000 watts of power.

If we used 10 x 20 amp / 120 Volt circuits in a 200 amp Main Service Panel and maxed out each circuit to its full 20 amps each [Not recommended if circuits are inside walls and/or conduit], you would only have 24,000 watts available in power.

So, both Main Service Panels were rated for 200 Amps maximum.  However, we can utilize the power much better with 240 Volts instead of 120 Volts.  Does this make sense now?

notlist3d, is right...

It sounds like you need an electrician.  Trust me on what I'm saying about available watts regarding 240 Volt verses 120 Volt.  Your Main Service Panel is rated in Amps and Volts.  It's limited for 120V/240V [Either can be used] and it is more than likely limited to 200 amps REGARDLESS of what voltage (120V or 240V) for your circuits in the home.

I agree with this statement to a point, but I believe the 200AMP main service is related per pole and not total - So if you approach 200A on either pole you will trip the breaker.
If you divide the 120V services up between the poles equally, end result would be the same with 48000 Watt capacity.

I know from experience a 200 amp main service panel is not rated for 200 amps for each pole.  I purchased enough rigs to trip the main breaker at 200 amps on both poles combined.  I was an electrician for 3 years in commercial work for Marathon Electrical Contractors.  I was taking classes at night to get my masters certification but did not take it to completion.  I've tripped my main service panel several times over the summer trying to figure out how many rigs maximum I could run on my 200 amp main service panel.  All of my PDU's are "metered."  

Trust me... I don't "believe" the 200 amp main service panel is 200 amps on each leg.  I "know" It's NOT 200 amps on each leg.  I "know" from experience.

I'm not saying this with a "tone" to be argumentative.  I'm saying this in a manner to try to educate.  That's all...

A 200 Amp Main using 10 x 240 Volt / 20 Amp 2 pole breakers with maximum draw on each 2 pole breaker would pull 48,000 watts of power at 200A/240V.  Any more than this "should" trip the main breaker.

A 200 Amp Main using 10 x 120 Volt / 20 Amp single pole breakers with maximum draw on each single pole breaker would pull 24,000 watts of power at 200A/120V.  Any more than this "should" trip the main breaker.

Also know this:  Current (Amps) is not flowing in a circuit without a load on that circuit.  Meaning, current (amps) will not flow without an appliance, light, TV, etc... actually turned on and running.  So, just because you have breakers in your main service panel that probably total up to more than than what your main breaker states is because it's highly unlikely you have more than 50% of current draw on every circuit wired to the main service panel.

Just thought id chime in on this for a second.. I had an electrician install 400 amp service on my rent house.. We split the output into two 40 slot 200 amp service panels..  Those panels although not recommended i ran up to 170 amps on both legs(before the upgrade i was pushing it to 210 but i put a fan on the main breaker.  Just because i got away with it for over 5 months dont mean you will have same results.   75% is recommended max load on a circuit.. the main breaker was rated at 200 amps.  It barely broke a sweat.. Now what i think your mistaken on is your math.. Although its correct your missing that in a 20 slot box, yes it will hold 10 double pole or 20 single pole breakers not 10.. thus still giving you your 48000 watts total.. By the sounds of it your more versed in this area than i.. Please correct me if im wrong

Best Regards
d57heinz

edit found this with little search effort.. http://forums.mikeholt.com/showthread.php?t=109846

"Nope, the initial statement is correct. A 200 amp single phase 120/240 v service can provide 200 amps at 240 volts, or it can also provide 400 amps at 120 volts. I didn't mean to imply that it could provide both simultaneously.


If we look at this in terms of volt amps:

240v * 200a = 48000 VA
120v * 400a = 48000 VA

Either way the capacity is the same."

Best Regards
d57heinz

[1714661626]

1714661626

[1714661626]

1714661626

[philipma1957]

How to Upgrade an Electrical Panel to 200-Amp Service
http://www.thisoldhouse.com/toh/video/0,,20802535,00.html

I important thing on that link on their website: Difficulty: Hard  Work should be performed by a licensed electrician

Check local ordinances but most places will require a licensed electrician and possibly permits.  Or you might be lucky and live in a place with not much ordinances. Upgrading to a 200 amp is not really a DIY thing.

I am good at diy.

my home was built during the Vietnam era many homes built in New Jersey at that time used interior aluminum wire due to a war copper shortage.

I wired my entire home in copper.  I put in 32 new circuits but when it came time to put in a 200 amp 120/240 box with room for forty single pole or 20 double pole breakers I called in a pro.

The reason is simple I would not trust myself with 2 wires from the outside transformer that are hot and carry 48000 watts of power.

The licensed electrician went to my roof disconnected  the lives wires from the meter put the box in did all the inside work and then attached the two outside wires well worth the money I paid him.

I'm a big DIY guy myself also.  I do basically all of my own auto maintenance/repairs and home improvements, build my own computers, etc. etc.  There are some things that, even though I know I am technically capable of, I still leave to a professional.  Generally it's anything that could kill me if I do it wrong.

It only takes one slip up working with a main breaker and BAM, your heart will get stopped instantly.  There's also the risk that something you wired up could cause a fire and that not only puts you and your belongs in danger, but your neighbors as well.

I got myself really good 1 time with power.

a 4 foot fluorescent light blub.  1 hand on each end  while putting the bulb into a hot fixture I ran the current right across my chest.  Felt my heart contract due to the power, hurt like fuck.  Ever since that day I became far more cautious about power circuits.

[adaseb]

Hmm, just wondering: When you recieve the S7, you get a note that says you need to check if the heatsinks are attached before powering on the miner.
The problem is, you can't do this without opening the miner, and breaking warranty. Am I missing something? I did not check this, other than trying to look thru it with some light..

Do they want us to shake it? Listen for parts that are loose?

If its like the S3, you can open it without them knowing. There are no tamper evident screws.

[hawkfish007]

Hmm, just wondering: When you recieve the S7, you get a note that says you need to check if the heatsinks are attached before powering on the miner.
The problem is, you can't do this without opening the miner, and breaking warranty. Am I missing something? I did not check this, other than trying to look thru it with some light..

Do they want us to shake it? Listen for parts that are loose?

If its like the S3, you can open it without them knowing. There are no tamper evident screws.

Mine had a sticker on one of the screws you need take off to access the boards. So I didn't open until BM said its ok.

[dmwardjr]

Just thought id chime in on this for a second.. I had an electrician install 400 amp service on my rent house.. We split the output into two 40 slot 200 amp service panels..  Those panels although not recommended i ran up to 170 amps on both legs(before the upgrade i was pushing it to 210 but i put a fan on the main breaker.  Just because i got away with it for over 5 months dont mean you will have same results.   75% is recommended max load on a circuit.. the main breaker was rated at 200 amps.  It barely broke a sweat.. Now what i think your mistaken on is your math.. Although its correct your missing that in a 20 slot box, yes it will hold 10 double pole or 20 single pole breakers not 10.. thus still giving you your 48000 watts total.. By the sounds of it your more versed in this area than i.. Please correct me if im wrong

Best Regards
d57heinz

When you say, "... I ran up to 170 amps on both legs (before the upgrade) I was pushing it to 210 but I put a fan on the main breaker." it's kind of confusing.

I can see pushing a 200 Amp Main Breaker on a Main Service Panel to 210 amps.  Especially, with a fan blowing on it.  The more amps flowing in the Main Breaker, the hotter the main breaker will get.  Mine would get very hot just before tripping this summer when figuring out how many rigs I could have running while the AC was running along with the dryer or stove/oven.  When I would try to flip it back on to get things running again, I would have to wait 3 to 5 minutes for the Main Breaker to cool down enough to actually flip back on.  It would keep tripping until it was cooled down enough.

Also, when breakers are rated, it's within a certain percentage.  Some manufacturers state their breakers are as stated +/- 2%.  Some say +/- as much as 5%.  10 Amps is 5% of the 200 Amp Main breaker you had.  So, yes, I can see pushing it to 210 Amps.  Especially, with a fan blowing on it to keep it cooler to avoid tripping sooner from the heat.

As for the "170 amps on both legs," are you referring to the two 120 Volt legs in a single 200 amp Main Service Panel?  If so, are you implying you were running 170 amps on each 120 Volt leg?  If that is the case, you're implying a total of 340 amps was flowing through the 200 amp main service breaker.  That's impossible in my opinion if that is what you are implying.  I can see 170 amps total on both legs "combined."  However, you said after that you pushed the main breaker to 210 amps with a fan blowing on it.  The statements were conflicting unless I'm misunderstanding.

I'm fully aware most panels in homes have more than 20 slots for the example I provided with 10 x 20 amp 2 pole breakers.  Also, most homes have more than 10 slots for the example I provided with 10 x 20 amp single pole breakers.  I only gave those two examples to show we can max out our Main Service Panel with 200 amps worth of circuits by using all 120 Volt circuits or all 240 Volt circuits and that the advantage of 240 Volt circuits is more POWER (watts) even though both voltages totaled up to the same 200 amps.  240 Volt circuits will provide double the wattage verses 120 Volt circuits.

I challenge anyone to find in the National Electrical Code (NEC) where the main service panel is to be reduced to only 75% of it's manufacturer's rating.  No one will find it.  My professor in class challenged us to find it in the code as our assignment over the weekend and nobody found it come Monday evening when we were back in class.  We were given that assignment after one of the students insisted the Main Service Panel is to be reduced to 70 to 80 percent of its rating like circuits inside walls and/or conduit.  It was easy to find that limitation set on each individual circuit inside walls and/or conduit in the NEC but that reduced limitation to 75% of the rating for Main Service Panels was not found in the NEC by any student for main service panels.  Our professor told us before we left class for the weekend we would not find it and he was right.

That 75% limitation put on circuits inside walls and/or conduit is understandable as a precaution.  However, it's not required to reduce the limits of a main service panel to only 75% of it's rating.  Someone even tried to use the argument to reduce the main panel to 75% of it's rating for a Main Service Panel inside of a wall made of wood with sheet rock.  However, the reduction to 75% was made for the WIRE and RECEPTACLES inside the walls and not for the breakers in the Main Service Panel.  He said, "The only occasion in which an electrician would consider telling the owner to limit their main service panel to 75% of it's rating is if the service cable INSIDE OF A WALL was rated for the same amps as the Main Breaker in the Main Service Panel.  That's why it's best to install a service cable INSIDE A WALL between the service meter and the main service panel at a higher rating than the Main service panel to avoid potential fire hazard while enabling the owner the ability to use the full rating of their main service panel.

For example:  If the service wire INSIDE A WALL between the service meter and the main service panel is rated for only 200 amps and connected to a 200 amp main breaker, the customer would need to be informed to only use 75% of their main service panel rating of 200 amps.  If the service cable INSIDE A WALL between the service meter and the main breaker was rated for 300 amps and connected to a 200 amp main breaker, there would be no fear of the service cable INSIDE THE WALL going to the main breaker over heating and creating a fire INSIDE THE WALL.

My main service panel is mounted on center blocks inside the garage and not mounted to a sheet rock wall on 2 x 4's.  Also, my service cable between the service meter and the main breaker is rated for 300 amps and it's NOT INSIDE A WALL.  It is mounted with clips on the center blocks up high going to the Main Service Panel.  It would have been fine to use a service cable rated for only 200 amps since it's not inside a wall.  However, the electricians who built my house chose to be on the side of caution.

[Tupsu]

If its like the S3, you can open it without them knowing. There are no tamper evident screws.

Click to enlarge

[dmwardjr]

edit found this with little search effort.. http://forums.mikeholt.com/showthread.php?t=109846

"Nope, the initial statement is correct. A 200 amp single phase 120/240 v service can provide 200 amps at 240 volts, or it can also provide 400 amps at 120 volts. I didn't mean to imply that it could provide both simultaneously.


If we look at this in terms of volt amps:

240v * 200a = 48000 VA
120v * 400a = 48000 VA

Either way the capacity is the same."

Best Regards
d57heinz

Hi d57heinz,

I just noticed your edit and I also read the link you provided.  What that electrical told the guy answering the question is correct.  One statement in that thread could have been taken the wrong way by a novice.  "VA" (Volt Amps) is not the same thing as Amps.  Transformers are rated in VA not A.

The very last statement on that page is correct in relation to a Main Service Panel inside a home or business.  The VA statement one guy made is more applicable to transformers than the Main Breaker inside of a Main Service Panels.  Hence, the last statement someone made in that thread to avoid confusion to the novice.

Kind regards,

[cryptichermit]

Well, I guess my farm is defying all logic then.
I'm certainly pulling in over 200A total - all using 120V.

I'll post this to you again.  You may not have read it:

Say we had a 200 AMP Main Service Panel and every circuit was 240V circuits by using 2 pole breakers...  If every circuit was used at it's max [Not recommended if circuits are inside walls and/or conduit], you could have 10 x 20 amp / 240 Volt circuits for a total of 48,000 watts of power.

If we used 10 x 20 amp / 120 Volt circuits in a 200 amp Main Service Panel and maxed out each circuit to its full 20 amps each [Not recommended if circuits are inside walls and/or conduit], you would only have 24,000 watts available in power.

So, both Main Service Panels were rated for 200 Amps maximum.  However, we can utilize the power much better with 240 Volts instead of 120 Volts.  Does this make sense now?

notlist3d, is right...

It sounds like you need an electrician.  Trust me on what I'm saying about available watts regarding 240 Volt verses 120 Volt.  Your Main Service Panel is rated in Amps and Volts.  It's limited for 120V/240V [Either can be used] and it is more than likely limited to 200 amps REGARDLESS of what voltage (120V or 240V) for your circuits in the home.

I agree with this statement to a point, but I believe the 200AMP main service is related per pole and not total - So if you approach 200A on either pole you will trip the breaker.
If you divide the 120V services up between the poles equally, end result would be the same with 48000 Watt capacity.

I know from experience a 200 amp main service panel is not rated for 200 amps for each pole.  I purchased enough rigs to trip the main breaker at 200 amps on both poles combined.  I was an electrician for 3 years in commercial work for Marathon Electrical Contractors.  I was taking classes at night to get my masters certification but did not take it to completion.  I've tripped my main service panel several times over the summer trying to figure out how many rigs maximum I could run on my 200 amp main service panel.  All of my PDU's are "metered."  

Trust me... I don't "believe" the 200 amp main service panel is 200 amps on each leg.  I "know" It's NOT 200 amps on each leg.  I "know" from experience.

I'm not saying this with a "tone" to be argumentative.  I'm saying this in a manner to try to educate.  That's all...

A 200 Amp Main using 10 x 240 Volt / 20 Amp 2 pole breakers with maximum draw on each 2 pole breaker would pull 48,000 watts of power at 200A/240V.  Any more than this "should" trip the main breaker.

A 200 Amp Main using 10 x 120 Volt / 20 Amp single pole breakers with maximum draw on each single pole breaker would pull 24,000 watts of power at 200A/120V.  Any more than this "should" trip the main breaker.

Also know this:  Current (Amps) is not flowing in a circuit without a load on that circuit.  Meaning, current (amps) will not flow without an appliance, light, TV, etc... actually turned on and running.  So, just because you have breakers in your main service panel that probably total up to more than than what your main breaker states is because it's highly unlikely you have more than 50% of current draw on every circuit wired to the main service panel.

Just thought id chime in on this for a second.. I had an electrician install 400 amp service on my rent house.. We split the output into two 40 slot 200 amp service panels..  Those panels although not recommended i ran up to 170 amps on both legs(before the upgrade i was pushing it to 210 but i put a fan on the main breaker.  Just because i got away with it for over 5 months dont mean you will have same results.   75% is recommended max load on a circuit.. the main breaker was rated at 200 amps.  It barely broke a sweat.. Now what i think your mistaken on is your math.. Although its correct your missing that in a 20 slot box, yes it will hold 10 double pole or 20 single pole breakers not 10.. thus still giving you your 48000 watts total.. By the sounds of it your more versed in this area than i.. Please correct me if im wrong

Best Regards
d57heinz

edit found this with little search effort.. http://forums.mikeholt.com/showthread.php?t=109846

"Nope, the initial statement is correct. A 200 amp single phase 120/240 v service can provide 200 amps at 240 volts, or it can also provide 400 amps at 120 volts. I didn't mean to imply that it could provide both simultaneously.


If we look at this in terms of volt amps:

240v * 200a = 48000 VA
120v * 400a = 48000 VA

Either way the capacity is the same."

Best Regards
d57heinz

d57heinz - this was one of the EXACT sources I used in determining my electrical needs.  If you look further you'll find the EXACT same thing being said in dozens of electrician forums on the internet.
  I'm not claiming to be an electrician as are some, but I think the confusion comes from the fact that the 2 poles are 180 degrees out of phase and thus the MAIN does not see 340A simultaneously, but 170A on leg 1 with one phase and 170A on leg2 during the different phase.  This is essentially the same as 240V - using 2 x 120V out of phase connections to achieve the 240V.

I can also concur that I'm utilizing 32000 watts sustained currently - majority on 120V - divided among the 2 poles/legs.  Fluctuations go up to 38000 watts during use of misc items like washer/microwave/gaming machine/hot water heater/air compressor etc..

[dmwardjr]

d57heinz - this was one of the EXACT sources I used in determining my electrical needs.  If you look further you'll find the EXACT same thing being said in dozens of electrician forums on the internet.
  I'm not claiming to be an electrician as are some, but I think the confusion comes from the fact that the 2 poles are 180 degrees out of phase and thus the MAIN does not see 340A simultaneously, but 170A on leg 1 with one phase and 170A on leg2 during the different phase.  This is essentially the same as 240V - using 2 x 120V out of phase connections to achieve the 240V.

I can also concur that I'm utilizing 32000 watts sustained currently - majority on 120V - divided among the 2 poles/legs.  Fluctuations go up to 38000 watts during use of misc items like washer/microwave/gaming machine/hot water heater/air compressor etc..

I did not mean for it to be taken that you can draw 340 amps ON BOTH LEGS SIMULTANEOUSLY.  Yes, there are 200 amps available on both legs.  Yes, one can draw 200 amps on one pole (leg) in the main panel depending on how many Ohms of resistance is in the load.  However, one cannot DRAW 200 amps of both legs simultaneously (400 Amps).  The 200 amp breaker would trip well before that would happen.

You said in a previous post:

Well, I guess my farm is defying all logic then.
I'm certainly pulling in over 200A total - all using 120V.

This is not possible on a 200 amp main service panel with a 200 amp main breaker.  Yes, there is 200 amps "available" on each pole [That some call legs] but a 200 amp breaker would not allow more than 5% of 200 amps in most cases.  So, even though there is 400 amps total available on both poles combined, a 200 amp main breaker will not allow for more than a 200 amp load to flow.

Yes, I've said I'm an electrician.  However, I have also said I'm not a "certified" electrician.  I quit taking my night courses for master electrician just shy of taking the test to become a "journeyman" electrician.  I was an "apprentice" [Gaining experience] while taking night courses for almost 3 years.  In order for one to take the journeyman test and/or the master electrician test, they must have a certain number of hours (experience) in the field before being allowed.  I've said in many posts throughout bitcointalk.org that I'm not a "certified" master electrician.

I'm not here to argue, Sir.  I prefer to keep this civilized.  You said you are putting a load of 32,000 watts on your 200 amp panel with most of it on 120 Volts.  If we do the math, that is a conflicting statement to the statement you made earlier.  Which see:

Well, I guess my farm is defying all logic then.
I'm certainly pulling in over 200A total - all using 120V.

You said you are pulling (drawing) OVER 200 A total.  If that's the case, you are pulling (drawing) more than 24,000 watts with all of it using 120 Volts.  So, "all using 120V?"  One statement says "most" of it on 120V and another saying, "all" of it on 120.  Which is it?

If you were pulling 32,000 watts with "all" on 120 Volts [32,000 watts divided by 120 volts = 266 amps] that would defy logic of having a 200 amp breaker.  If you insist on saying you're pulling more than 200 amps through a 200 amp breaker, be my guest.  I'm not going to try to convince you otherwise.  However, if you believe the very link you said you went to, then listen to the last quote in that link if you don't want to listen to me:



You have too many conflicting statements, Sir.  It's so confusing that I don't know what you are trying to imply anymore.  It's just not possible to pull 32,000 watts at 120 volts (266 amps) through a 200 amp breaker UNLESS the breaker is defective.  

[UfoRia]

For those wondering if the firmware fixes the issue with not having internet access potentially frying a s7, I can confirm it. My father-in-law was watching my kids today and was having issues with the wireless on one of my Roku boxes. He arbitrarily started setting static ip addresses and knocked two of my seven s7's offline about five hours ago. Both had the new firmware luckily, but one of my seven did not. I killed the port on the juniper switch with the one that had the old firmware and the fan crawled to an idle, so I can confirm beyond a reasonable doubt that the new firmware keeps the fan at a very high idle if there is no internet connection.

I asked him what time he messed with the addresses on the Roku and it was five hours ago. On both of the ones he knocked off before finding a non-reserved IP they were both beeping very loudly, but the fans were spinning at a high rpm. During my test on the one with the old firmware the fan was barely spinning, so for the father-in-law variable the last one is updated now. Hard resetting them both allowed them to recover, luckily I am anal and log dhcp assignment and errors to syslog. It only took me a little while to figure out that he picked addresses that were in my reserved dhcp exclusion range.....

Neither auto-reconnected, which I find to be an interesting design flaw or bug.

Sigh!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!


Ufo

[dmwardjr]

For those wondering if the firmware fixes the issue with not having internet access potentially frying a s7, I can confirm it. My father-in-law was watching my kids today and was having issues with the wireless on one of my Roku boxes. He arbitrarily started setting static ip addresses and knocked two of my seven s7's offline about five hours ago. Both had the new firmware luckily, but one of my seven did not. I killed the port on the juniper switch with the one that had the old firmware and the fan crawled to an idle, so I can confirm beyond a reasonable doubt that the new firmware keeps the fan at a very high idle if there is no internet connection.

I asked him what time he messed with the addresses on the Roku and it was five hours ago. On both of the ones he knocked off before finding a non-reserved IP they were both beeping very loudly, but the fans were spinning at a high rpm. During my test on the one with the old firmware the fan was barely spinning, so for the father-in-law variable the last one is updated now. Hard resetting them both allowed them to recover, luckily I am anal and log dhcp assignment and errors to syslog. It only took me a little while to figure out that he picked addresses that were in my reserved dhcp exclusion range.....

Neither auto-reconnected, which I find to be an interesting design flaw or bug.

Sigh!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!


Ufo

Thanks for the information, Sir.  Much appreciated!  Glad I updated to new firmware then.  Can keep fan on auto and not worry if internet goes out a while.  I normally don't do firmware updates but I think this one is worth it.

[bbOOmm]

Well, after I am been thinking whole night about PSU to fire up S7, I have decided to call up and electrician and get a 240V dedicated circuit installed at my home for my S7 Batch 3 and APW3-12-1600-B2 PSU. Any suggestions?

You will be happy you went this route.  If you are getting a 30 amp circuit, you can have 5 x S7's on that one circuit.

A 30A 240V circuit takes 2 lines/poles of 120V 30A connections.  This would mean its using 60A of 120V.  60A at 120V would also allow for 5 x S7's.

Why pay loads of cash to change existing electrical layout if you can avoid it?  ROI is already hard enough to achieve no?

<shakes his head then beats it hard on the keyboard till the keys fly off >

I hear this sooooo much, not only from bitcoin junkies, but from these darn plug and play ham operators who are just over glorified screwdriver wizard CBers who memorized 35 questions to pass a multiple choice test but know only how to plug something into a wall outlet or a USB port.

I teach better in person, scary blue sparks and all maybe I'll make a video, to teach these slightly misinformed individules .... I never seem to get my full point across in text.

to be continued......

[dmwardjr]

<shakes his head then beats it hard on the keyboard till the keys fly off >

I hear this sooooo much, not only from bitcoin junkies, but from these darn plug and play ham operators who are just over glorified screwdriver wizard CBers who memorized 35 questions to pass a multiple choice test but know only how to plug something into a wall outlet or a USB port.

I teach better in person, scary blue sparks and all maybe I'll make a video, to teach these slightly misinformed individules .... I never seem to get my full point across in text.

to be continued......

Rut Ro...   

[cryptichermit]

You have too many conflicting statements, Sir.  It's so confusing that I don't know what you are trying to imply anymore.  It's just not possible to pull 32,000 watts at 120 volts (266 amps) through a 200 amp breaker UNLESS the breaker is defective.  

OK, believe what you will.  I do know several "licensed" electricians and had one confirm with me today, after these exchanges, that it is Per Phase on the Main - not total.
So each phase can be loaded with 80% load and the main will not trip as they are out of phase and not an addition of current.

Here is a list of miners and wattage that I am currently using - all at 120V.  They alone are exceeding 200A in power usage -

13 x s7's = 15730 WATTS
8 x s5's = 4720 WATTS
1 x S4 = 1400 WATTS
3 x A2 @ 88 = 2250 WATTS
4 x A2 @ 110 = 4000 WATTS

TOTAL WATTS = 28100 @ 120v = 234A

The only 240V circuits being used are 1) Stove - 2) Water Heater.
Even with the miner loads, I'm still able to use all sorts of other electricity - IE this computer - a couple 1000 Watt gaming machines, a 200 Watt Laser Cutter, air compressors, electric drills, radios, garbage disposal, hair dryers (when gf needs),  and charge my Chevy Volt.

You are saying this is impossible, unless defective - seems to be working.

[dontetris]

Greetings,


I just received my Batch 1 S7's today.
Hardware error seems to be very high, I have no idea what might cause this.
I bought hp atsn 7001133-y000 2250W power supplies, one of them runs one S5 and one S7,
it should be more than enough, the temperature in the room is around 22-23 degrees.
(the S7's report 49-50 degrees)
I know the timeframe is not too big, but the S7's hardware errors are 3.45%, 2.05% and 0.31%
as of this moment (in 2 hours running). I do not count the errors coming up right after bootup.
Can the PSU cause this? I cannot think of anything else. And if it can, why?
I am grateful for any ideas, this is very sad...

[dmwardjr]

You have too many conflicting statements, Sir.  It's so confusing that I don't know what you are trying to imply anymore.  It's just not possible to pull 32,000 watts at 120 volts (266 amps) through a 200 amp breaker UNLESS the breaker is defective.  

OK, believe what you will.  I do know several "licensed" electricians and had one confirm with me today, after these exchanges, that it is Per Phase on the Main - not total.
So each phase can be loaded with 80% load and the main will not trip as they are out of phase and not an addition of current.

Here is a list of miners and wattage that I am currently using - all at 120V.  They alone are exceeding 200A in power usage -

13 x s7's = 15730 WATTS
8 x s5's = 4720 WATTS
1 x S4 = 1400 WATTS
3 x A2 @ 88 = 2250 WATTS
4 x A2 @ 110 = 4000 WATTS

TOTAL WATTS = 28100 @ 120v = 234A

The only 240V circuits being used are 1) Stove - 2) Water Heater.
Even with the miner loads, I'm still able to use all sorts of other electricity - IE this computer - a couple 1000 Watt gaming machines, a 200 Watt Laser Cutter, air compressors, electric drills, radios, garbage disposal, hair dryers (when gf needs),  and charge my Chevy Volt.

You are saying this is impossible, unless defective - seems to be working.

I'm beginning to wonder if you have a 300 or 400 amp breaker thrown in a main panel rated for 200 amps.  Also, when you say, "All on 120V," are you using 2 pole or single pole breakers for your rigs?

I had more equipment than you have at one time [A total of 44 rigs, consisting of 18 x S3's, 5 x S4's, 6 x S5's and 15 x SP20's].  Yet, I could not run all my rigs at the same time with the clothes dryer and stove/oven on at the same time.  I could only run one at a time (dryer or stove/oven).  Otherwise, the main breaker would trip.  And this was with all of my rigs on 240 Volts on a 200 amp main panel.  You are basically saying your 120 Volt provides more power than my 240 volts.

One or the other is going on:  Either you have a main service panel with a breaker much higher than 200 amps; you have a main breaker that is defective and absolutely will not trip; or you are lying.

[wolfen]

You have too many conflicting statements, Sir.  It's so confusing that I don't know what you are trying to imply anymore.  It's just not possible to pull 32,000 watts at 120 volts (266 amps) through a 200 amp breaker UNLESS the breaker is defective.  

OK, believe what you will.  I do know several "licensed" electricians and had one confirm with me today, after these exchanges, that it is Per Phase on the Main - not total.
So each phase can be loaded with 80% load and the main will not trip as they are out of phase and not an addition of current.

Here is a list of miners and wattage that I am currently using - all at 120V.  They alone are exceeding 200A in power usage -

13 x s7's = 15730 WATTS

8 x s5's = 4720 WATTS
1 x S4 = 1400 WATTS
3 x A2 @ 88 = 2250 WATTS
4 x A2 @ 110 = 4000 WATTS

TOTAL WATTS = 28100 @ 120v = 234A

The only 240V circuits being used are 1) Stove - 2) Water Heater.
Even with the miner loads, I'm still able to use all sorts of other electricity - IE this computer - a couple 1000 Watt gaming machines, a 200 Watt Laser Cutter, air compressors, electric drills, radios, garbage disposal, hair dryers (when gf needs),  and charge my Chevy Volt.

You are saying this is impossible, unless defective - seems to be working.

I'm beginning to wonder if you have a 300 amp breaker thrown in a main panel rated for 200 amps.  Also, when you say, "All on 120V," are you using 2 pole or single pole breakers for your rigs?

Isn't a 200 amp main at 240 volts? So it would be 400 amps at 120v?
Use both legs on each breaker 200 amps max
One leg on each breaker 400 amps max
Same power/wattage either way

[philipma1957]

Back to topic.  My batch 2 comes tomorrow.

Orders on 2 and 3 are done. 


so if you ordered on the 21st of oct or later have you received shipping info?

[wolfen]

Back to topic.  My batch 2 comes tomorrow.

Orders on 2 and 3 are done. 


so if you ordered on the 21st of oct or later have you received shipping info?

Just October 12 shipped.
October 17 and October 21 no.

[p3yot33at3r]

Orders on 2 and 3 are done. 

so if you ordered on the 21st of oct or later have you received shipping info?

I ordered on 18th Oct - & no, no shipping info.

I did however manage to finally get a response from someone at bitmain, Yoshi:

Miners are shipping this week and next week.....

..but no answer as to why batch 2 are being shipped after batch 3 or what compensation is being offered. So, it's entirely possible that I might not get my order for another 2 - 3 weeks!.

Pretty diabolical