how do you wire a 220v line for multiple miners in the US?

[Philopolymath]

retracted

[bitcoinguy123]

Im not sure if I understand it correctly, but I think the problem here is how to get a 220V electricity to a 110V supply (US & Canada).

Easiest is getting a step-up transformer (110V - 220V). You will just have to bear with the extra heat and buzzing sound from the transformer.

Another way is just wire 2 110V line with different phase (antiphase) and 1 on ground from pole transformer to get 220V supply. Line that to a separate breaker.

Get a PDU and tap it there, then there goes the PSU for the miners.

transformer = badmove quality ones are costly and you still have a powerlimit.

your second idea is


a true 220 line from the breaker box  which is what is being discussed.

Here in the usa.  most of us have 2 separate hot lines    when  wired properly to a 220 breaker you get 220.

I can second that the transformer is a bad idea.  A few years ago we had a packing machine for another business that was setup for 220v but there was no way to pull a line to the machine because the commercial space leased at the time had a breaker box that was ancient and wasn't worth updating.  We tried this step up transformer box and it worked but it was very faulty and sporadic.  In the end we ended up not using the packing machine and it collected dust until we moved to another leased space which could accommodate  the wiring.

[bitcoinguy123]

YOU DO IT LIKE THIS..It is just SOOOOOO EASY....

And All 8x S9's Running just fine...Mission accomplished

NOTICE NO PDU NO PLUGS..3x PSU's are connected straight to 220V 30amp line using bare wire and marrets & electric tape.

Notice the cut off ends of the power cables...On left of 3rd shelf..(top pic)
Marrets connection for bottom shelf plus spare PSU cable on floor can be seen at front right corner of 3rd shelf (Top pic)
I have 3x 30 amp lines..one power cable on floor is ready to fire up My 9th S9
In Dec I will add #'s 10 11 12 each line will host 4 S9's or I might run another 30 amp line.

Just be careful with this.  These 220v lines are no joke, (heck that goes for all electricity). I see you've got it in a confined space and whatnot, but make sure no children or even adults messing around in the area.  You could probably get away with it at home or shed/outbuilding, but where I am in commercial spaces, I'd have to have it in conduit and plugs mounted on the wall.  My local fire marshal would have a field day if I tried this but then again I'm dealing with the public on a regular basis.

[philipma1957]

You built a Death Trap bro.  But I do agree it would work.

YOU DO IT LIKE THIS..It is just SOOOOOO EASY....

And All 8x S9's Running just fine...Mission accomplished

NOTICE NO PDU NO PLUGS..3x PSU's are connected straight to 220V 30amp line using bare wire and marrets & electric tape.

Notice the cut off ends of the power cables...On left of 3rd shelf..(top pic)
Marrets connection for bottom shelf plus spare PSU cable on floor can be seen at front right corner of 3rd shelf (Top pic)
I have 3x 30 amp lines..one power cable on floor is ready to fire up My 9th S9
In Dec I will add #'s 10 11 12 each line will host 4 S9's or I might run another 30 amp line.

[mdude77]

You built a Death Trap bro.  But I do agree it would work.

Yeah, I was going to say, this is wrong in so many ways.

M

[Philopolymath]

retracted

[philipma1957]

Death trap..BULLSHIT....It's perfectly safe...SAFER THAN CODE!
Most electrical fires are from FAULTY PLUGS AND RECEPTACLES..CAUSED BY CERTIFIED ELECTRICIANS!!!
NEC is just another alphabet bloated incompetent corrupt bureaucracy that does not give shit about safety..
They are about maintaining a monopoly and discouraging self education and independence.
Most code was written in the early 1900's when wires were bare or had cloth coverings..
Code is ONLY to absolve big business from liability and while using cheapest materials possible and ensuring profits for G.E.

I used Hospital grade heavy gauge cables rated for 300V 20amp. ..for power cables..
My load is 60%..
I'm on a 100 acre farm 1 mile off a dirt road to the farm..
I'm a Physicists...experienced retired EEng and know exactly what I'm doing and WHY it is fine.
Philip no offense you are an inspiration & legend in mining but....
Pardon my french...Stick your corrupt Government dumbing down fear porn propaganda up your ass..

I could give two shits about code,

What you built is a death trap it is not mechanically sound.

It allows for too much power if a short happens.

You are relying on the psu to shut down if you short. It looks like that psu can access all thirty amps

That is 7200 watts. Before the circuit breaker trips.

So unless the psu has multiple fuseing you gave it the ability to pull more then 4x what it is rated for.


Now if the line to the psu has been fused at the splices it would be mechanically sound but not code.

So did you put in fuses at each splice for each psu? If you did. It violates code but is not a death trap.

One reason I use pdus is they can come fused .

Much safer then allowing 7200 watts into a psu rated for 1600 watts.

I would also doubt you used power cords for the individual psus that are 10 gauge which are 30 amp rated


I buy used pdus from eBay.  So far about a dozen since I began mining.  I always pay under 50 usd.

They are all fused. They are worth getting .   I don't  believe in using multiple receptacles whengood low cost pdus can be purchased .

I don't rely on the psu to shut down if there is a short.