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

[philipma1957]

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/

Doesn't the 90 day warranty on the psu concern you?

M

Made by delta.    It seems good

[mdude77]

Doesn't the 30 day warranty on the psu concern you?

M

Made by delta.    It seems good
[/quote]

I mis-spoke.  30 day warranty.

I'd be concerned about it frying my mining equipment.  Or worse.

It's like a car battery.  You could get the cheap 30 day warranty one, or the more expensive 5-year warranty one.

Perhaps I'm jaded.  I had bitmain PSU's blow a few days after their warranty expired.  Never again will I buy a cheap PSU.

M

[QuintLeo]

Here is my complete shopping list from panel to power supply...

Circuit Breaker to match your power panel
http://www.ebay.com/itm/NEW-SQUARE-D-HOM230CP-HOMELINE-30-AMP-DOUBLE-POLE-CIRCUIT-BREAKERS-6721344-/311302683815?epid=691118573&hash=item487b15fca7:g:fYcAAOSwPYZU7QzP

Some wire

A Device box
http://www.ebay.com/itm/Madison-Electric-MSB1G-One-Gang-Device-Box-with-Depth-Adjustable-/112438725322?hash=item1a2ddecaca:g:YFgAAOSw1x1UP4hK

An outlet
http://www.ebay.com/itm/Pass-Seymour-locking-receptacle-L6-30R-MADE-IN-U-S-A-30-amp-250V-twist-lock/390917364485?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649

Outlet cover
http://www.ebay.com/itm/NEW-LEVITON-Commercial-1-Gang-Stainless-Steel-Power-Outlet-Wall-Plate-84020-040/352146065381?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649

APC 4-outlet PDU
http://www.ebay.com/itm/APC-AP9570-Basic-Rack-Power-Distribution-Unit-PDU-1U-208V-30A-Rack-Mountable/391768769897?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649

Power cords
http://www.ebay.com/itm/Monoprice-3ft-16AWG-Power-Extension-Cord-Cable-3-Conductor-PC-Mon-C13-C14-Black/371192776255?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649


Based on the cost of circuit breaker, wire and outlet the PDU would be cheaper.

 You have to have the breaker anyway, no matter how you set the circuit up.
 Same on the power cords.

 When I rewired the heaters in my current location, it cost me less than $50 ALL UP to set up a pair of 20 amp 220 circuits with 3 outlets EACH (though 20/20 hindsight I'm thinking I should have put 4 or 5 on each - I might end up changing that eventually.)
 I have NEVER seen a PDU that was $25 or less unless it was broken.

[HashZilla]

Here is my complete shopping list from panel to power supply...

Circuit Breaker to match your power panel
http://www.ebay.com/itm/NEW-SQUARE-D-HOM230CP-HOMELINE-30-AMP-DOUBLE-POLE-CIRCUIT-BREAKERS-6721344-/311302683815?epid=691118573&hash=item487b15fca7:g:fYcAAOSwPYZU7QzP

Some wire

A Device box
http://www.ebay.com/itm/Madison-Electric-MSB1G-One-Gang-Device-Box-with-Depth-Adjustable-/112438725322?hash=item1a2ddecaca:g:YFgAAOSw1x1UP4hK

An outlet
http://www.ebay.com/itm/Pass-Seymour-locking-receptacle-L6-30R-MADE-IN-U-S-A-30-amp-250V-twist-lock/390917364485?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649

Outlet cover
http://www.ebay.com/itm/NEW-LEVITON-Commercial-1-Gang-Stainless-Steel-Power-Outlet-Wall-Plate-84020-040/352146065381?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649

APC 4-outlet PDU
http://www.ebay.com/itm/APC-AP9570-Basic-Rack-Power-Distribution-Unit-PDU-1U-208V-30A-Rack-Mountable/391768769897?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649

Power cords
http://www.ebay.com/itm/Monoprice-3ft-16AWG-Power-Extension-Cord-Cable-3-Conductor-PC-Mon-C13-C14-Black/371192776255?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649


Based on the cost of circuit breaker, wire and outlet the PDU would be cheaper.

 You have to have the breaker anyway, no matter how you set the circuit up.
 Same on the power cords.

 When I rewired the heaters in my current location, it cost me less than $50 ALL UP to set up a pair of 20 amp 220 circuits with 3 outlets EACH (though 20/20 hindsight I'm thinking I should have put 4 or 5 on each - I might end up changing that eventually.)
 I have NEVER seen a PDU that was $25 or less unless it was broken.

I was assuming you use 1 set of breaker/wire for each outlet as opposed to multiple outlets on 1 breaker.

[QuintLeo]

If wire up multiple outlets, you don't NEED to use a PDU.

 8-)

[jstefanop]

If wire up multiple outlets, you don't NEED to use a PDU.

 8-)

Yep my farm is made up of a bunch of these




6kw IOT PDU for 50 bucks worth of parts wired directly 30A breakers, with full control anywhere in the world on my iPhone

[mdude77]

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

[philipma1957]

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

[mdude77]

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

[bitcoinguy123]

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?

[Steamtyme]

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.

[mdude77]

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]

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.

[bitcoinguy123]

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.

[mdude77]

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

[philipma1957]

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.

[T-Gee05]

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]

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.

[QuintLeo]

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]

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

https://bitcointalk.org/index.php?topic=2245487.msg22687179#msg22687179

this will work very well for a garage.