Topic: Best PDU to break out a 30Amp 220V USA home circuit (Read 5708 times)

24 amps is the continuous load you'll want to put on a 30amp PDU. You want 80% -- 20 amps really shouldn't have more than 16 amp loads on them, and so forth.

AP7811 is 24a at 208v. I thought I needed to find a 30a PDU?

AP7811 for metering without switching.

I kind of like the metering capabilities. Especially since I am splitting this "mining center" with a friend and he has to pay for electricity he uses.

Sure but there are cheaper PDU if you don't need fancy metering capabilities.  Lots of 30A 208V/240V PDU on ebay for $30 to $40 ea.

So this should work right APC AP7841 ? http://www.ebay.com/itm/APC-AP7841-Rack-PDU-Metered-Zero-U-30A-200-208V-20-C13-4-C19-/301063548435

I See so I need to find a 30a PDU then...Will look round. Any suggestions?

Generally you should match the plug to the wire to the breaker to the device.

A 20 amp breaker protecting 12 AWG wire should mate with a 20 amp plug and feed a 20 amp PDU.  Pretty straight forward.

A 30 amp breaker protecting 10 AWG wire with a 30 amp plug feeding a 20 amp PDU is asking for trouble.

Locking vs non locking is a matter of preference.  Residential applications typically use non locking.  http://en.wikipedia.org/wiki/NEMA_connector does a pretty good job at summarizing the advantages and disadvantages.

Sounds like the ap7911 will do the job. It uses a L6-30p plug. Guess I will plan on that.

Any other affordable used (sub $200) metered/switched PDUs I should look at?

It does, you will either need C19 to C20 cables or C13 to C14 depending on what PSUs you are using. Some PDUs come with a power cord attached, but most come with a C20 socket that you can choose whatever your wall outlet plug style is and then get a C19 on the end of it to hook to the PDU's C20 input.

Great thank you! And the plug/receptacle doesnt make a difference?

Three phase power is used for heavy loads and is usually not pulled to residential areas. It's essentially 3 feeds, but it uses less conductor material overall, so it's more efficient in the transfer of power.

Single phase is almost always what you'll be dealing with at your house.

Any metered PDU generally does the job, there are a few with network jacks that make things even more configurable remotely (you can turn banks on/off, reset power remotely, etc.). The cheapest brands are generally APC/TrippLite, but they work okay for most people.

Woah now you are talking. 12 Ants on one breaker sounds great. I dont understand electrical all that well (I will be paying a professional to do all this, but I like to have any idea of what to tell them). What does single phase vs three phase mean?

Here is my main box. the "hot tub" labeled breaker is the circuit I will be using:



Here is the conduit coming out of the main heading to the backyard:



Here is the Spa breaker box:



So the PDU will have a 220v plug and the PDU will have connections for standard 120v looking plugs?

Can you recommend a solid, affordable PDU?

EDIT: These are the PSUs I am going to use: http://www.ebay.com/itm/321306693173. Should be fine right? IBM x3650 835W Hot-Swap Power Supply 24R2730

EDIT 2: Okay re-reading this it looks like there are different types of 220v plugs... like 6-20r or L6-30R. Is one better than the other?

If I want to convert to 220v for all my corsair psu's, do I have to buy a special outlet and iec power cables? Or can I wire a regular 110v outlet for 220v and use the standard cables they come with?

Converting down to a bunch of 120v doesn't make much sense. Keep it at 220v, and just about any PSU now-a-days will run perfect on 220, if not more efficient.

Is it 60a single or three phase? If it's single, just add two 30A breakers and you're set. If it's three-phase, you can add 3x 30A breakers.

Either way, for however number of 30A breakers you have, put a PDU on each one. Each breaker is rated for 30A, but you only want to run it @80% for a continuous load, which is 24A, which is why those PDUs are rated for 24A (continuous).

When you're powering Ants off 220v, assume each Ant will pull 2A, so you can power 12 Ants off each breaker/PDU.

I could use some feedback here. I decided to forgo my spa power to instead work for powering Ants. It is 220v 60a running 8 guage copper wiring. Should I:

- Create a bunch of 20a 120v breaker circuits and wire outlets?
- Leave it at 220v and get a PDU instead?
- Or what should I do to allow myself to plug in Antminers?

Yes, 

Make a pig tail cable to transfer power from one type of plug to another.....  Purchase a 30 amp dryer plug, a twist lock female connector 30 amp 220V and 2 feet of 10 gauge cable 3/10 (or purchase 10 or 20 feet and make an extension cable). 

Strip wires,  and hook up ground and two hots correctly,  and ensure grounding is hooked up.  Leave netural blank/not connected. Plug into dryer and purchase a simple tester from a hardware store to test voltage.

Then plug in PDU,  and plug in PSU.  Google "IEC 60320" to find out more information about c19 and c13/14 plugs.

Ryan

BTC    161DmzbihX6WmvVXTVkshdNmZk4L9HpGpj

It's a recurring joke that my boss keeps pushing us to use our GPU farm to make jerky. Just hang slabs of meat in front of the exhaust fans venting large volumes of hot, dry air? Why not?!

Anyone have a good solution for plugging a PDU into a 4 prong dryer plug?

We don't have a dryer. I have rigs in the laundry room. The clothes get dried fast! 

It's generally not that expensive when you consider the return on your investment in this space.

True hardcore miner would tell the wife to get rid of Dryer, saturate the Dryer line with rigs and maker her hanging clothes to dry (using heat from the rigs)


LOL  someone must try this....

Yeah I assume installing that and running wire to a second story would be pretty dang expensive.

Mmmm, delicious!

No.  But a 30A 240V circuit is going to have 4x the wattage of a 15A 120V one.

Here is a dumb question. I am running Antminers overclocked. And they keep tripping my 15a circuits with just 4.... They take around 425 watts each. Does a PDU allow you to somehow run more power on a circuit than if you were to run it straight through?

We do the same thing with power on after loss, and it's a great way to remotely reboot a rig.

As far as turning them on one at a time, I don't think you really need to do that. Unlike a mechanical motor that pulls the most amp draw on startup, mining rigs don't really start to pull their max amps until they're already booted and they start mining. I mean it's not going to hurt, but it's also not completely necessary.

We do time our startup on to have a built in delay for our rigs with dual PSUs. We have the PDU turn on the PSU connected to just the GPUs first, and then 10 second later we turn on the PSU that turns on the rig. We do this to prevent the rig from turning on without registering the GPUs that may not have been fully powered yet.

And lastly, you do want to be careful of pulling too many amps, and you also may need to load-balance your PDU. Our PDUs only have 8 ports, and are rated for 24A, but we accidentally drew 25A exclusively on the right 4 ports, leaving the left 4 empty. It blew an internal fuse, and now those right 4 ports are unresponsive, and it reports a fuse error. Seems the whole unit has a limit of 24A, but the left and right halves also had internal fuses that can't draw the full amount. We're basically left with a 4 port, 12A PDU until we can open it up and replace that fuse. Moral of the story: Load balance is your friend.

ap7911 is the same as the 7941 just in a 2u design vs a 0u

I found a AP7811 for cheap that I am going to try. (Its the metered but not switched version of the AP7911). I'll go for a 7911 on my 2nd 30A circuit when i buy some more mining equipment.  Thanks for the tips all!

A) Switched PDUs are seriously the shit. We picked up some used Sentry ones for like $40/each a few months ago. The first time I logged into the web interfaces and turned on our first 12kW of GPUs I had the biggest dumb grin on my face. And now, remotely power-cycling any of our miners is well worth the initial investment.

B) That's a sexy looking rack. Giggity. But seriously, well done with that. We were gonna go with a rack/shelf idea, but we were trying to cram too many into the rack at a time, and ran into heat issues. We really wanted 5 GPUs per rig, and we were trying to fit each rig within 6U, which meant staying away from stock frames like what you've got. We ended up going with a $70 2'dx4'wx5'h shelving unit and some 1"x2" trim that gives us 2 rigs on each of the 5 shelves.

We use APC AP7911 30amp 220V PDUs in our racks, they cost about $130 used on ebay. Most ATX supplies accept either 110V or 220V in so all you need is the C13 - C14 cables.

The PDU is rated at 24A (12 Amps per bank @ 220V) so you can pull about 5KVA from your 30 Amp L6-30p plug.

Our racks draw about 5Kw for 10Mh in hashing power:

I have the APC AP7941 got it for $120 off amazon. Another $40 for cables or so (C13 to C14) and your all set. If you buy one request that it is reset to factory defaults cause I spent alot of time trying to make the cable to reset it. But I have my motherboards on "on after power loss" and I can reset my systems from anywhere. Also it will switch them on one at a time so you don't surge and trip your breaker

The only bad thing is it comes up with warning at over 24amp's. I don't think it hurts it to run it over that though

I have some spare dell 30R's, we ended up going with 6-20r.

What power distribution unit do you guys suggest to connect to a 30 amp 220 V USA home circuit. It will have a L6-30R receptacle.