Topic: My new garage and 200 amps - page 2. (Read 3091 times)

30A circuits limit your PSU at 3x 1200W (7..8A - 1500W each at the wall) power supplies per circuit in continuous load. I'd rather go with multiple receptacles of 20A (good enough for 2 power supplies each), and not using those expensive PDUs.

Overall is cheaper.

I think he was writing it as 208V/240V because it is the same exact connectors for 208V single phase and 240V.  Same wiring configuration, same plugs, same outlets, same PDUs, etc.  Never seen a PDU that didn't work on both 208V and 240V.  All the components have to be rated to 240V anyways or they would be a code violation.   

You don't get 208V with a normal residential service. 208V is one leg of a 3-phase service .. usually data-center grade.
What you get with a residential service is 250V split phase. That should be good enough for mining, but the data-center PDUs are not rated for it.

https://bitcointalksearch.org/topic/m.8182756

Have fun!

You're absolutely right... I just didn't want to get into it and confuse the OP by saying, "Well, we really are a 240V split at the center pole into 2 120V lines and a ground in your home".  That just seemed too much, so I stuck with the history lesson on why we've got 120V in our homes

Well US service is 240V.  It is 240V split phase producing 120V between either leg and the ground and 240V between both legs.  There are no 120V mains in the US (or it would be very non-standard and archaic).

This is the fate we suffer for being early adopters.  Back when electric service was new, the higher voltages tended to burn out the lightbulbs too quickly, so the 110/120V standard was adopted for residential power transmission.  By the time engineers figured out how to make stuff that wouldn't burn out with the higher voltages, the US didn't change because there was too much infrastructure already in place.

Only reason is because US households are wired primarily with 120v, and (even if you have a 240v circuit) it can be difficult to get 240v power cables for your PSU's.

Most PDU's have either L6-20p cords though you can find them with the C19/C20 or C14/C15 PSU style plugs.  You can get L6-30 to L6-20 adapters, but they start around $35-$40 each, so if you're going to have an electrician out, I'd have him install L6-20r recepticles right next to your L6-30r's.  Just watch how many amps you put on a circuit at any given time and you'll be fine.  That's usually not a big deal as a 30A circuit can safely handle 30x240 (x80% for continuous load safety factor) 5,760w.  That would easly handle 5xEVGA 1300G2 PSU's running 15xAntminer S3's.

For the same power rating, doesn't 240v takes less current from the mains than 120v? So what is the reason to use a 120v mains ?

You use something like this to power your PSU's:

http://www.buypdu.com/power-cords/iec-c13/iec-c14.html?gclid=CPLX_vTu-78CFWwQ7AodfRcA9w

Depending on the PSUs you are running will determine if you get the 10 or 15 amp version (though in truth, at 208/240v you will only need the 10amp).  The Triplite PDUs are set up to use these cords and will work with any EVGA/OCZ power supply.  A typical PDU can be found here:

http://www.tripplite.com/metered-pdu-30a-208v-240v-2u-c13-c19-outlets-l6-30p-single-phase~PDUMH30HV/

Remember, it's more efficient to use 208/240 versus 120 to power your equipment.

This is exactly what I was looking for, I think. When you say the pc power supply can be run on 240V, are you talking about using the PDUs that others have suggested or something else? I can't plug them directly in as the plug doesnt fit in the Nema L6-30r.

You don't need an electrician. Just buy a Tripplite PDU and appropriate cords for the PSUs for the 240v plug.

Btw, all current, good quality PSUs can take 240v.

Ask your electrician.  He will know what the local codes are and stay within them. 

Five 30A x 208/240V drops terminating with Nema L6-30r  receptacles.  Get Some PDUs to plug into those.  Save
the last 10A of headroom for some huge ass fans. You'll need them.

Why would you want to use 120V?  PC power supplies can run on either.  240V is more efficient, cheaper, and puts less stress/heat on the power supplies.

If I got a new 240v outlet, how would I use it to power my miners. What are my configuration options. Am I limited to power supplies that have 240v plugs (like IBM DPS-2000BB). If you were getting new circuit breakers put in what would you get? Eventually I won't be mining so I would use these outlets for tools (table saws, band saws), do they use 240v outlets?

^^^^  tl,dr   ^^^^

I have a new house and therefore a new garage. I would like to put all my miners in said garage. The circuit breaker panel is already in the garage. I have a meeting tomorrow morning with an electrician. At that time I would like to tell him what outlets I would like.

I've already talked to bge, and I can use 26000 watts. I'm planning to put all of this in the garage. Suggestions on outlets, configurations, my sanity, areas I might have issues. The goal here is safety first, looking normal second (like a heavily decked out tool room, not like Im trying to recreate a tesla experiment). If nothing else, because a year from now, I might not be mining, but I will need tools.

Is there a way to make a 240v outlet, a 120v outlet? I know you can't do the opposite as the wires in the wall would melt, but I would think you could do this? I think I saw a power strip that had 120v sockets, and it plugged into a 240v outlet hence making a 240v outlet a 120v outlet.

If I haven't made it clear, feel free to tell me I'm crazy and that I'm going to burn my house down, just be specific and detailed on the how.