Help Please! What would be the best way to power 15 Sp20's from home???

[youngkenzie]

Best ideas on how to power 15 Sp20's from home safely and efficiently?

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[philipma1957]

Best ideas on how to power 15 Sp20's from home safely and efficiently?

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 I run 9 sp20's and 1 s-5 .  give us info .

 what state if you are in the usa.

what is your power cost per kwatt?   both the delivery charge and the kwatt charge.



  110v 100 amp  box is not going to  do it.  it can safely do 80% of 11000 or 8800 and nothing else

110v   150 amp box is just about enough.  it can safely do  80% of 16500 or 13200

110v 200 amp with 220v service is pretty good. it can safely do  80% of 22000 or 17600 watts

a sp20 can use as low as 500 watts and as high as 1250 watts  depends on how you set the sp20.

I use around 6500 watts running my 10 pieces of gear.  I underclock.   My machines vary from 550 to 710 watts each and total about 6500 watts.

 I have a 110 volt 150 amp setup .

 I could wire a few 220 volt lines as my box has 3 spots to use 220 volt fuses.

 I choose to stay with the 110 volt wiring and not bother to upgrade to a few 220volt circuits.

[Prelude]

You don't want to use 120v for that many miners. Wire a few 240V 30A lines. You'll save on wire cost, your PSUs will be more efficient and have a longer lifespan, and you'll only use half the amperage from your panel VS 120V.

Each 240V 30A circuit can provide 5760w safely vs 2880w on a 120V 30A circuit using the same wire size. (10AWG) It's a no brainer.

[philipma1957]

You don't want to use 120v for that many miners. Wire a few 240V 30A lines. You'll save on wire cost, your PSUs will be more efficient and have a longer lifespan, and you'll only use half the amperage from your panel VS 120V.

Each 240V 30A circuit can provide 5760w safely vs 2880w on a 120V 30A circuit using the same wire size. (10AWG) It's a no brainer.

not sure if he has 110 or 220. Some don't have 220 upgrade possible.


_______________________________________________________________________
in my case my garage is wired with 5x 20 amp  110 volt circuits. was done in the 1990's

  so I did not need to do the 220 volt lines.

cost = 0 .  

while i could have run 220 my panel is as far as it can possibly be  from my garage.

  a run of new wire would be 80 feet at least.

 I would do  or 1x 6 gauge run to a 220volt panel in the garage. 

still kind of want to do it.  but I am a bit lazy. I am allowed to do it my self if I pull  a permit.
 
Have to love New Jersey laws that allow a homeowner to wire their own home by themselves .

___________________________________________________________________________
now as to  the op we just do not know  what he has yet.

I do agree  that if it is easy he should run 3 sets of 220v 30a wires from  his circuit panel  to his miners  this will allow him very easy power source .   almost 15000 watts maybe even 16000 or 17000 safe watts.

he needs a big panel.  

 200 amp service would be nice for him.  the circuit panel in the same room or a room close to his miners also helps.

[Prelude]

Well, assuming he's either in Canada or USA, he's got 240v running to his main panel. All homes do. Where do you live, youngkenzie?

philipma, are you saying you've got 5 separate circuits running to your garage? IE 5 breakers and wires?   I really doubt that's the case. You must have one 240v 100A breaker in your main panel in your house, with a single 3 AWG copper or 1 AWG aluminium cable running to a sub panel in your (detached?) garage. From that sub panel, you'd have 5 20A 120v breakers. Correct? Having 5 separate runs to your detached garage would make no sense at all. If the garage is attached to your home you probably wouldn't have a sub panel, but 5 20A runs is still a little odd to me.

Don't forget that your wires don't care if they're running 120V or 240V, it's all the same to them. A 120V outlet can be easily converted to 240V, just need to swap the breaker and outlet for the appropriate 240V spec. No need to run a new 80' wire, you reuse the existing wire.

All my mining is done from home with a 200A service, and every miner I have runs on 240V. I started off using 120V, but it's just too inefficient. I quickly switched to using 240V, as I simply wouldn't be able to operate my household normally mining on 120V considering heavy hitters like the oven, clothes dryer, water heater, etc.

Another nice trick I've used in the past is using existing 240v circuits for baseboard heaters. No need for them with miners. Just need to bypass the thermostat.

[youngkenzie]

I live in Houston, Texas. I think electricity is cheep compared to the national average. I am an extremely fast learner, but I do have limited information as of right now on the best way to do this. The plan is to put them in the garage for now until summer. Houston summer's may cause the garage environment to be too hot. I am concidering having an electrition come take a look at what set up we have and ask him for his take on it. I am all ears to anyone who can help. Thank you in advanced to everyone. I will post as soon as I have the information everyone is asking about. Again, thank you for your time and concideration. Also whoever I deem to be the most helpful will receive a reward, which is TBA at the current moment.

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[Prelude]

Yeah, if you arent comfortable wiring things yourself you should definitely call an electrician.

You have access to 240V, so you absolutely should take advantage of that. Look into 240V 30A PDUs on Amazon and eBay, they're a great way to power a lot of gear with a single 240v 30A outlet. They usually have a twist lock plug, and a bunch of outputs for power supplies. That's the best way to go in my opinion.

Have you already ordered your 15 SP20s? Do you already have power supplies to hook them up?

Have you considered how you will connect them to the Internet? I'd suggest either a power line ethernet adapter from your router or a wifi bridge to a 16 port network switch, or more ports if you plan on expanding in the future.

As for the Texas heat, you'll want to have a good ventilation setup. You need to figure out how many qubic feet your garage is, and use a powerful enough fan to change the air in the garage every minute or so. For example, if your garage is 1000 qubic feet you'd want a fan rated at 1000CFM (cubic feet per minute) to extract the heat and dump it outside of your garage. Air conditioning is also an option, but much more costly with the electricity it will consume.

[philipma1957]

Well, assuming he's either in Canada or USA, he's got 240v running to his main panel. All homes do. Where do you live, youngkenzie?

philipma, are you saying you've got 5 separate circuits running to your garage? IE 5 breakers and wires?   I really doubt that's the case. You must have one 240v 100A breaker in your main panel in your house, with a single 3 AWG copper or 1 AWG aluminium cable running to a sub panel in your (detached?) garage. From that sub panel, you'd have 5 20A 120v breakers. Correct? Having 5 separate runs to your detached garage would make no sense at all. If the garage is attached to your home you probably wouldn't have a sub panel, but 5 20A runs is still a little odd to me.

Don't forget that your wires don't care if they're running 120V or 240V, it's all the same to them. A 120V outlet can be easily converted to 240V, just need to swap the breaker and outlet for the appropriate 240V spec. No need to run a new 80' wire, you reuse the existing wire.

All my mining is done from home with a 200A service, and every miner I have runs on 240V. I started off using 120V, but it's just too inefficient. I quickly switched to using 240V, as I simply wouldn't be able to operate my household normally mining on 120V considering heavy hitters like the oven, clothes dryer, water heater, etc.

Another nice trick I've used in the past is using existing 240v circuits for baseboard heaters. No need for them with miners. Just need to bypass the thermostat.

5 circuits  done by me in 1990.  very long story.  my home was built in 1970 during a USA copper shortage due to Vietnam war.  My home had 100 amp circuit panel with  all aluminum wires (except for the 6 gauge 220v air conditioner circuit)

   I rewired the entire house with 10 gauge and/or 12 gauge copper wire.  Had an electrician put in  an 150 amp 40 circuit panel .

I suspected I may be able to make a line or 2  convert from 110volts to 240 volts.

  I need to trace  the circuits  it has been a while (16 years ) since I wired the garage,  I do not want to make a circuit 240 volts and not know every socket along the line.

 I believe every garage line would be hard to locate every outlet .

 But I do have a very short  line  in my spare bedroom it is a 2 foot run to the circuit panel. It has 10 gauge copper.

 This would be the most likely circuit to upgrade from 110 to 220v   can I use a 30 amp if I do it? The run from panel to the lone outlet is only 2 or 3 feet.

This is exciting for me if I make the bedroom have 220v and 30 amp I could run 6600 to 7200 watts derate by 80%   5280 watts to 5760 watts

not bad at all

[Prelude]

Damn, must have cost a pretty penny to rewire everything to copper. 12AWG is good for 20A, and 10AWG is good for 30A of 120V or 240V.

So yeah, you could easily convert that outlet by switching the breaker. Your neutral line becomes a second 120V leg, so 2x 120V + ground. That circuit could handle 7200w non continuous, or a continual load of 5760w. I suspect you will soon be hit with the "wow why didn't I do this earlier" 240V bug and you'll convert as much as you can.

Edit: I notice you keep referring to your voltage as 110v and 220v. Have you actually measured it with a multimeter? The standard in Canada/USA is 120/240. Unless you're living in Detroit or something you should have a full 240v at your panel, not 220v.

[philipma1957]

Damn, must have cost a pretty penny to rewire everything to copper. 12AWG is good for 20A, and 10AWG is good for 30A of 120V or 240V.

So yeah, you could easily convert that outlet by switching the breaker. Your neutral line becomes a second 120V leg, so 2x 120V + ground. That circuit could handle 7200w non continuous, or a continual load of 5760w. I suspect you will soon be hit with the "wow why didn't I do this earlier" 240V bug and you'll convert as much as you can.

Edit: I notice you keep referring to your voltage as 110v and 220v. Have you actually measured it with a multimeter? The standard in Canada/USA is 120/240. Unless you're living in Detroit or something you should have a full 240v at your panel, not 220v.

I run 117 to 118 when measured   almost never get to 120.  So I round down to 110.  keeps better safety measures for overloading.



Yeah it took forever to wire my whole home back in the 90's  but copper was much cheaper.  I will surely change the one in the spare bedroom.

 I will add a  pdu and run some avalon 4's

[Prelude]

Yeah, that's normal since you've got a heavy load on the panel already, voltage will sag a bit. If everything was powered off you'd have a clean 120v.

[youngkenzie]

psu's just came in, still waiting on the Sp20's. If I run into any problems, I'll let you guys know.

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[MCHouston]

I live in Houston and currently have 27,000 Watts of miners at home and putting in more.

You can PM me if you have any questions.  It is very easy to convert 120v to 240v plugs, as long as its only outlets on the breaker you can just install a 2 pole breaker move the neutral to hot and change the plugs and you now have double the watts without re-running the wires.  Please stick to NEC code and if you do not know hire an electrician.

Last thing I want to see on the front page of the Houston Chronicle is "Bitcoin miner died by self Electrocution" 

Good luck.

[youngkenzie]

@MCHouston Thanks ill pm you