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

philipma1957

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Quote from: Philopolymath on October 08, 2017, 04:36:47 PM

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.

Philopolymath

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mdude77

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Quote from: philipma1957 on October 08, 2017, 02:29:01 PM

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

philipma1957

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

Quote from: Philopolymath on October 08, 2017, 10:36:30 AM

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

Quote from: Philopolymath on October 08, 2017, 08:20:05 AM

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.

bitcoinguy123

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Quote from: Philopolymath on October 08, 2017, 10:36:30 AM

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

Quote from: Philopolymath on October 08, 2017, 08:20:05 AM

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.

bitcoinguy123

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Quote from: philipma1957 on October 07, 2017, 12:02:44 AM

Quote from: T-Gee05 on October 06, 2017, 11:31:45 PM

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.

Philopolymath

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philipma1957

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here is a set of soundproof /psu videos for up to 3 avalon 721 or 741

https://bitcointalksearch.org/topic/m.22687179

this will work very well for a garage.

QuintLeo

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Quote from: mdude77 on October 06, 2017, 08:21:25 PM

With that in mind, I'm going to use three 741s on two 2400w PSUs. That should be about 1800w for each PSU for three 741s.

I ran my S5/SP20 farm the same way when I had it - 3 miners on a pair of Seasonic X1250 or EVGA G2 1300 supplies.

Just make sure each hash board is powered from the SAME power supply and you should be good to go.

It also gave me plenty of headroom to crank that SP20 HARD (it was the "middle" unit on it's trio/pair).

philipma1957

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Quote from: T-Gee05 on October 06, 2017, 11:31:45 PM

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.

T-Gee05

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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.

philipma1957

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Quote from: mdude77 on October 06, 2017, 10:14:39 PM

Quote from: bitcoinguy123 on October 06, 2017, 09:06:55 PM

I think you sort of figured it out for me. Three 741's on two 2400w PSUs. On a 30 amp line which is easy for me to run from the panel and then use the 30A PDU that will safely hook the two power supplies up.

This also leaves you a little room in case you swap out 741s for S9s. Or whatever new stuff might be coming that uses more power.

M

I am running 1 2400 watt delta for each one.

Good results cuts down noise a lot.

mdude77

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Quote from: bitcoinguy123 on October 06, 2017, 09:06:55 PM

I think you sort of figured it out for me. Three 741's on two 2400w PSUs. On a 30 amp line which is easy for me to run from the panel and then use the 30A PDU that will safely hook the two power supplies up.

This also leaves you a little room in case you swap out 741s for S9s. Or whatever new stuff might be coming that uses more power.

M

bitcoinguy123

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Quote from: mdude77 on October 06, 2017, 08:21:25 PM

Quote from: bitcoinguy123 on October 06, 2017, 07:42:02 PM

Quote from: mdude77 on October 06, 2017, 02:30:28 PM

I just got a clamp amp meter and measured the power usage.

With two 741s using the 94% PSU mentioned above, at 245v, I'm pulling 9.9amp of current.

That works out to about 1,212 watts of power a piece.

No wonder two of them caused a 2400w PSU to scream like a jet engine!

That also means that, even with 245v, they are pulling about 5amps a current a piece. That means no more than 4 on a 30amp line.

BTW, this is with the 941s set to "-2" volts. They are averaging 14.6TH/s between the two, which tells me that the -2 isn't doing anything.

M

I've recently ordered 5 of the avalon 741 for October 16th shipping.

I haven't purchased the power supplies yet. Was planning on ordering from parallelminer. Based on the comments of it screaming like a jet engine, do you recommend using one per 1200w version setup or should I order dual 2400w one. I know its cheaper to purchase the dual 2400w one, but of course there must be plus and minus to this. Any suggestions?

Each 741 has two boards on it, each using 3 pci-x connectors. Each board has to use the same power source, but you can use two different power sources for each board.

With that in mind, I'm going to use three 741s on two 2400w PSUs. That should be about 1800w for each PSU for three 741s.

I do not recommend using a 1200w PSU for a 741. If it pulls 1150, you are still way too close to the limit of that PSU. For me, at 245v, on a 94% efficient PSU, they are pulling 1212 watts a piece, which is obviously over 1200w.

M

I think you sort of figured it out for me. Three 741's on two 2400w PSUs. On a 30 amp line which is easy for me to run from the panel and then use the 30A PDU that will safely hook the two power supplies up.

Steamtyme

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Quote from: mdude77 on October 06, 2017, 08:21:25 PM

With that in mind, I'm going to use three 741s on two 2400w PSUs. That should be about 1800w for each PSU for three 741s.

I like that idea, I knew I would be cutting it close so I talked to the manufacturer of my PSU just to be sure before I bought my 741's, he told me I would have enough for the 2 of them but to not overclock them.

mdude77

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Quote from: bitcoinguy123 on October 06, 2017, 07:42:02 PM

Quote from: mdude77 on October 06, 2017, 02:30:28 PM

I just got a clamp amp meter and measured the power usage.

With two 741s using the 94% PSU mentioned above, at 245v, I'm pulling 9.9amp of current.

That works out to about 1,212 watts of power a piece.

No wonder two of them caused a 2400w PSU to scream like a jet engine!

That also means that, even with 245v, they are pulling about 5amps a current a piece. That means no more than 4 on a 30amp line.

BTW, this is with the 941s set to "-2" volts. They are averaging 14.6TH/s between the two, which tells me that the -2 isn't doing anything.

M

I've recently ordered 5 of the avalon 741 for October 16th shipping.

I haven't purchased the power supplies yet. Was planning on ordering from parallelminer. Based on the comments of it screaming like a jet engine, do you recommend using one per 1200w version setup or should I order dual 2400w one. I know its cheaper to purchase the dual 2400w one, but of course there must be plus and minus to this. Any suggestions?

Each 741 has two boards on it, each using 3 pci-x connectors. Each board has to use the same power source, but you can use two different power sources for each board.

With that in mind, I'm going to use three 741s on two 2400w PSUs. That should be about 1800w for each PSU for three 741s.

I do not recommend using a 1200w PSU for a 741. If it pulls 1150, you are still way too close to the limit of that PSU. For me, at 245v, on a 94% efficient PSU, they are pulling 1212 watts a piece, which is obviously over 1200w.

M

Steamtyme

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Hi there,

I'm running this as my PSU at the moment with more on the way to expand.

http://www.ebay.ca/itm/Power-Supply-for-Two-x2-Antminer-L3-with-Complete-PCI-e-Wiring-Installed/182298369039?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

I can't say much for sound as the Miners drown it out, but it has been reliable and handles my 2 741's at stock, with no problems. Granted it has only been a week, but it seems to get the job done. They are also super helpful in getting set up and making sure you are using the right equipment.

For me it's just preference and cost that made me decide to double up on 220V PSU's. I have also heard it is more efficient to operate that way. Also you have to look at what you have available; for me it is easy to run another 30 amp circuit in my garage or basement and not worry about it, for others not so much. You have a few weeks to figure it all out just take your time do the research, and pick what's best for you.

bitcoinguy123

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Quote from: mdude77 on October 06, 2017, 02:30:28 PM

I just got a clamp amp meter and measured the power usage.

With two 741s using the 94% PSU mentioned above, at 245v, I'm pulling 9.9amp of current.

That works out to about 1,212 watts of power a piece.

No wonder two of them caused a 2400w PSU to scream like a jet engine!

That also means that, even with 245v, they are pulling about 5amps a current a piece. That means no more than 4 on a 30amp line.

BTW, this is with the 941s set to "-2" volts. They are averaging 14.6TH/s between the two, which tells me that the -2 isn't doing anything.

M

I've recently ordered 5 of the avalon 741 for October 16th shipping.

I haven't purchased the power supplies yet. Was planning on ordering from parallelminer. Based on the comments of it screaming like a jet engine, do you recommend using one per 1200w version setup or should I order dual 2400w one. I know its cheaper to purchase the dual 2400w one, but of course there must be plus and minus to this. Any suggestions?

mdude77

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Activity: 1540

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I just got a clamp amp meter and measured the power usage.

With two 741s using the 94% PSU mentioned above, at 245v, I'm pulling 9.9amp of current.

That works out to about 1,212 watts of power a piece.

No wonder two of them caused a 2400w PSU to scream like a jet engine!

That also means that, even with 245v, they are pulling about 5amps a current a piece. That means no more than 4 on a 30amp line.

BTW, this is with the 941s set to "-2" volts. They are averaging 14.6TH/s between the two, which tells me that the -2 isn't doing anything.

M

philipma1957

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Quote from: mdude77 on September 30, 2017, 12:31:31 PM

Quote from: philipma1957 on September 04, 2017, 09:05:52 PM

just found this pdu and grabbed 2 of them

http://www.ebay.com/itm/Genuine-HP-EO4501-Server-Power-Distribution-Module-228481-002/232449268221?

got this power cord

4 of them https://www.monoprice.com/product?p_id=24202

and will use 2 of these psu's for each pdu

http://www.parallelminer.com/product/2400-watt-power-supply-kit-for-gpu-mining-94-efficiency-200-240v-ethereum-eth-zec-dash/

How much power does a 741 *really* use? I have 245v at the wall, using the PSU above. When I have two 741s running off one PSU, the PSU sounds like a jet engine. When plugged into 3 of the 4 "cards" for two 741s, it sounds much better.

I've seen the 741 listed as using ~1150w, but I've also seen it say "+15%". Which is it? I have a killawatt, but it's the 110 version, so I can't measure the power usage.

Even if it's 1150w exactly, that's 2300w on a 2400w psu, which is pretty high imho. I'm thinking two PSUs for three 741s is a much better idea.

Thoughts anyone?

M

I have been doing videos on sound control.
I plan to demo 1 delta 2400 watt doing 2 avalon 741's
I plan to demo 2 delta 2400 watt doing 2 avalon 741's

Topic: how do you wire a 220v line for multiple miners in the US? (Read 2087 times)