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How to wire up a 240VAC receptacle

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Gregg:
Now that you say you understand the concept of 120/240 volt US power I am wondering why you want that expensive PDU.  In your basement, you hardly need remote switching and the PDU you chose doesn't seem to be able to meter the power.
If I were wiring 7.5 KW worth of servers in my basement, I would put a sub panel near them and run separate circuits to each major server and maybe separate breakers to each of the power supplies in those that have dual power supplies.  There is a lot of scalability and some redundancy in such a system and it costs a lot less in the long run.  You can then put very inexpensive power strips in the equipment racks and easily change everything as your service grows.  I would also wire in a wrap around bypass panel ahead of the panel to later install a UPS without interrupting any of the servers. 

vk6zgo:

--- Quote from: Gregg on May 20, 2018, 01:08:31 am ---Now that you say you understand the concept of 120/240 volt US power I am wondering why you want that expensive PDU.  In your basement, you hardly need remote switching and the PDU you chose doesn't seem to be able to meter the power.
If I were wiring 7.5 KW worth of servers in my basement, I would put a sub panel near them and run separate circuits to each major server and maybe separate breakers to each of the power supplies in those that have dual power supplies.  There is a lot of scalability and some redundancy in such a system and it costs a lot less in the long run.  You can then put very inexpensive power strips in the equipment racks and easily change everything as your service grows.  I would also wire in a wrap around bypass panel ahead of the panel to later install a UPS without interrupting any of the servers.

--- End quote ---

That was my thought,too.

Most of the places I've worked, the power distribution was either designed  & built " in house", or was supplied as part of the equipment we were using, with the requirements specified when the EEs were ordering the system.
In both of the above methods, the power distribution setup could be "tailor made".

In the OP's case, it should be easy to customise the setup with discrete bits.

IanB:

--- Quote from: Gregg on May 20, 2018, 01:08:31 am ---Now that you say you understand the concept of 120/240 volt US power I am wondering why you want that expensive PDU.  In your basement, you hardly need remote switching and the PDU you chose doesn't seem to be able to meter the power.
If I were wiring 7.5 KW worth of servers in my basement, I would put a sub panel near them and run separate circuits to each major server and maybe separate breakers to each of the power supplies in those that have dual power supplies.  There is a lot of scalability and some redundancy in such a system and it costs a lot less in the long run.  You can then put very inexpensive power strips in the equipment racks and easily change everything as your service grows.  I would also wire in a wrap around bypass panel ahead of the panel to later install a UPS without interrupting any of the servers.

--- End quote ---

Exactly. All you need is two or three dedicated 30 amp circuits feeding L6-30R receptacles, and then a power strip like one of these for each receptacle to feed your devices with dedicated C13/C14 power cords. You don't need an expensive PDU with features you are not using.

http://www.apc.com/shop/us/en/products/SADE-89TKZQ/P-AP7541

In each server you can put redundant power supplies fed from different circuits.

Spork Schivago:

--- Quote from: Gregg on May 20, 2018, 01:08:31 am ---Now that you say you understand the concept of 120/240 volt US power I am wondering why you want that expensive PDU.  In your basement, you hardly need remote switching and the PDU you chose doesn't seem to be able to meter the power.
If I were wiring 7.5 KW worth of servers in my basement, I would put a sub panel near them and run separate circuits to each major server and maybe separate breakers to each of the power supplies in those that have dual power supplies.  There is a lot of scalability and some redundancy in such a system and it costs a lot less in the long run.  You can then put very inexpensive power strips in the equipment racks and easily change everything as your service grows.  I would also wire in a wrap around bypass panel ahead of the panel to later install a UPS without interrupting any of the servers.

--- End quote ---

There are reasons we need this PDU that I'd rather not go into.   Originally, we wanted a switched AND metered one, but HPE said they didn't make one that would work with our power supply.

I'm wondering though, now that we know they make mistakes, do any of you guys see a Switched AND metered horizontal 2U PDU that will work with my 120-0-120 split phase?

I feel comfortable saying it's not just power that we need the PDU to provide.   It's the features that come with it that are important.   And once we had this wired up, we were going to purchase another for redundancy.   Knowing now that we can definitely power those PSUs with our electricity, if we can send this back, we're definitely sending it back and at least purchasing two PDUs.   Hopefully we can split the load equally on both, but I'm really hoping just one can power the entire load.   That way, if one dies, we're notified and it automatically provides power to the broken PDU (depending on how it breaks) so our servers don't go down.

Money is always something to be conscious of, so even if we cannot send the PDU back, I think we're going to look into voiding the warranty and modifying it to work safely with our electricity, replace the European style plug with a nice NEMA L6-30P.   Someone else suggested that early on (at least the plug part).   We just have to wait to see what they say tomorrow.

Can you go a bit more in detail about the wrap-around bypass panel?    Eventually, the entire business will be on a seperate line, totally isolated from the residential stuff.   It'll have a dedicated panel (not a sub-panel), and a dedicated meter.   When we purchase the whole home generator, it'll have an ATS (Automatic Transfer Switch) that will have breakers in it.   We'll run them to both panels (well, have the company do it).   We still need a UPS.   We're slowly getting there though.   At least now, I can power my server again and install the upgrades (assuming the one 1400 watt can handle the entire load).   And then I can work on configuring that (which means another monthly bill for the VDA license).   But we're getting there.

Spork Schivago:

--- Quote from: IanB on May 20, 2018, 01:48:17 am ---
--- Quote from: Gregg on May 20, 2018, 01:08:31 am ---Now that you say you understand the concept of 120/240 volt US power I am wondering why you want that expensive PDU.  In your basement, you hardly need remote switching and the PDU you chose doesn't seem to be able to meter the power.
If I were wiring 7.5 KW worth of servers in my basement, I would put a sub panel near them and run separate circuits to each major server and maybe separate breakers to each of the power supplies in those that have dual power supplies.  There is a lot of scalability and some redundancy in such a system and it costs a lot less in the long run.  You can then put very inexpensive power strips in the equipment racks and easily change everything as your service grows.  I would also wire in a wrap around bypass panel ahead of the panel to later install a UPS without interrupting any of the servers.

--- End quote ---

Exactly. All you need is two or three dedicated 30 amp circuits feeding L6-30R receptacles, and then a power strip like one of these for each receptacle to feed your devices with dedicated C13/C14 power cords. You don't need an expensive PDU with features you are not using.

http://www.apc.com/shop/us/en/products/SADE-89TKZQ/P-AP7541

In each server you can put redundant power supplies fed from different circuits.

--- End quote ---

That PDU would not work at all for us.   We ARE using features of the advanced PDU that we have, hence the reason we purchased it.   But it'd be real nice if we could find an equivalent to the P9S13As that was still a G2 but supported the Switched AND Metered, like we originally wanted, but HPE said no way without three-phase (for horizontal).   We have a 36-unit rack, and actually prefer the horizontal units.    We will buy double of what we need for the load, just to daisy chain them and have the redundancy.   But there's still a lot more expensive stuff we need to work on as well.

We need the UPS, we need the whole home generator, we need the dedicated panel, the dedicated meter, the auto-loading / rotating rack mountable tape backup unit, tapes, still need to finish wiring up the house, still haven't received the proper ends for the shielded ethernet (I don't want to go in on why we need shielded, so please don't ask!), we still have to finish the contract (almost done), finished the other one which gave us the rest of the money, so we're good for a bit on cash, but it's not going to pay for everything, still need to setup the VMs, reenable the VDA license, etc, etc, etc.    Time and money is always something I'm aware of.

There are features these PDUs, like the one we have, we need.   Features that don't come with normal power strips or power distribution units.

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