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8
votes
3answers
431 views

Power Cables Required to Switch from 120v to 240v for Dell Poweredge Servers

We have a cabinet of servers and other hardware (switches, firewalls, etc) that all are currently running on 120v. I've confirmed that the power supply for all of our devices support both 120v and ...
-3
votes
2answers
97 views

How Do I Reset a Tripp Lite PDU [closed]

I am working on reselling a tripp lite PDU for my company, and I need to know how to reset it to default factory settings. In other threads it says to push the reset pin, however there is no pinhole ...
1
vote
1answer
111 views

desperately need 110v from a 208v pdu [closed]

I'm in a bit of a pickle... We're moving a client's infrastructure to a colocation facility. We have redundant 208v/30amp PDUs. While installing today, we realized that the client had a small ...
3
votes
1answer
58 views

Order of connections between UPSs and PDUs

Half of the equipment on my server cabinet (data servers, networking) are critical and need to be backed up by UPS's, while the other half of it is non-critical (high-load simulations that only take ...
9
votes
4answers
342 views

Maxing out both PDUs in a rack with redundant power

If I have a rack full of servers using redundant power supplies, and I'm keeping the amps at 80% (16A of 20A), isn't this still asking for trouble in the event of a power loss on one of the circuits? ...
-2
votes
1answer
120 views

Difference between a power strip, a power distribution unit (PDU) and a remote power switch? [duplicate]

I would like to know what is the main differences between a power strip, a power distribution unit (PDU) and a remote power switch. Thank you.
0
votes
2answers
252 views

It is possible to visualize the load of an APC switched PDU for a specified period of time?

There are some APC PDUs AP7953 and now we think about a solution for check the load over a period. We don't need a 100% correct Value only a trend on which hours we have more load to localize peeks in ...
41
votes
5answers
2k views

PDU wiring - is this normal (or even safe)?

I removed the side panel of our server rack so I can clean up some of the wiring. Inside I found the PDU was wired like in the picture. Instead of an incoming power cable, there's just 3 uninsulated ...
0
votes
1answer
207 views

Is there some software available to centrally manage APC IP enabled PDUs? [closed]

I am not looking for a recommendation of which one to use, just an answer as the whether anything to do this exists. We have a few dozen AP7921 & similar units that until now we have managed on ...
3
votes
1answer
349 views

PDU management interface has low availability - product flaw or isolated issue

Our colocation provider has supplied us with APC AP7932 switched 0U PDUs as part of several cabinets they provide us. We have had a lot of trouble with the network management aspect of these PDUs, ...
7
votes
3answers
542 views

Source of PDU De-Rating?

In researching PDU's I have noticed most cite a derated current at the 80% level. For example, 30A is derated to 24A: Tripp Lite: Raritan: Does anyone have anything that shows what agency this ...
2
votes
1answer
117 views

Correct UPS and PDU sequence

I'm pretty inexperienced when it comes to setting up power for a network rack. I have a location that has a dedicated 20 amp circuit with a LP-20P socket. I have a APC UPS 3000XL rackmount UPS and a ...
0
votes
1answer
98 views

Metered-By-Outlet-Monitoring PDU [closed]

I see APC offers Metered-By-Outlet PDUs, however they only offer 30A - 32A 208V PDUs. (URL: http://www.apc.com/products/family/?id=478) We are looking for a 16A 120V PDU that offers power usage ...
5
votes
1answer
212 views

Using Y split cables to connect two servers to a single PDU receptacle

We have bought a few 30amp 208v PDUs that only have 9 receptacles. The servers we are connecting to those PDUs will not use the full 30amps (at 80%, or actually 40% since we use redundant power) so we ...
10
votes
2answers
2k views

What is the difference between a PDU and a power strip (both 120V, 15A)?

I just chatted with an APC rep about upgrading the UPSes at our office. She recommended a single higher-capacity 6-outlet Smart-UPS to replace the four Back-UPS units we currently have. When I asked ...
0
votes
1answer
297 views

APC switched PDU rack, lost state after reboot or power loss

I have the following: We have a few APC 7920 PDU's Using POWER IQ to control the PDS's via SNMP 1/2 Using also Mobile Power IQ to control the PDU if need via iPad/iPhone I am in the process of ...
2
votes
1answer
166 views

Liebert MPH SNMP Poweroff

Super specific question, but here it goes. We have several Liebert MPH rack PDU units with the necessary Liebert 'RPC' cards intalled to allow for SNMP polling. Does anyone have experience with ...
3
votes
5answers
775 views

A plan to mitigate PDU failures?

A client just experienced a complete failure of an APC AP7911A switched/metered rack power distribution unit (PDU). This obviously took all of the connected equipment down with it. The equipment is ...
2
votes
1answer
146 views

PDU With Configurable AMP Limit

I have a 20 AMP/120V circuit. The only device plugged into this circuit is a 1000 Watt Dell UPS. Right now several devices plug directly into the 1000 Watt UPS. I wanted to order a PDU to help ...
1
vote
3answers
1k views

Is it possible to use mixed 110V / 208V power on a single server with dual power supplies?

Is it possible to run a dual power supply server with one PS plugged into 110V, and the other power supply plugged into 208V? We've asked the vendors and they say they've never tested it or some other ...
1
vote
3answers
2k views

Will a NEMA L5-20P plug work in a NEMA L5-30R receptacle?

I need to purchase a UPS & PDU and want to know if they will be compatible. Will the plug of the PDU be able to plug into this UPS? The UPS: APC Smart-UPS X 3000VA Rack/Tower LCD 100-127V with ...
0
votes
1answer
574 views

Running IBM servers at both 110v and 220v at the same time for a few seconds for power migration?

In our data center we are going to be moving all of our dual power supplied IBM servers (auto sensing 110/220) from an outdated 110 system of dumb power strips to an updated in rack 0u 220 monitored ...
10
votes
4answers
863 views

Proper Sizing for PDU's/Power in Rack

I've struggled with sizing my power sources and associated PDU's in my server racks. Somehow I feel like I'm way oversizing things based on nameplate requirements on power supplies. My simplistic ...
23
votes
6answers
5k views

Best practices for power cabling racks in DC

With network cables it is easy. I use velcro-ties, coloured cables, 0U vertical cable organizers from APC on side of the rack -- easy and neat. However with power cables it was always giving me ...
0
votes
3answers
2k views

Switching from 120v to 208v power

We are going to switch from 20 amp 120 volt to 20 amp 208 volt circuits in our colocation facility. I am new to dealing with anything other than standard 120v power, so I am unsure of some intricacies ...
1
vote
3answers
428 views

Are there any “Zero-U” PDU's that allow for power management/remote power control

I can't seem to find any PDU's (in general) that fit a 24U server rack that don't require at least 1U of rack space. (I'd prefer Zero-U) that allows for remote 'reset' of the power ports as well as ...
2
votes
2answers
766 views

APC switched rack PDU: Startup outlet state

I have an APC Switched Rack PDU powering a number of servers in a remote datacentre. After a recent power outage, I noticed that the outlets did not automatically default to the On status once power ...
2
votes
5answers
636 views

Power strategy for first server rack

We are about to install our first server and networking rack at my office. I'm more of a programmer than a sysadmin, so I'm learning as I go. Let me start by saying that it's just a router, patch ...
7
votes
2answers
4k views

How to step down voltage from 208V to 110V

I have some racks that will be fed by 208V/20A circuits. These circuits will be conditioned and battery-backed by the facility in which these racks will live. 99% of the devices in the rack will be ...
0
votes
2answers
89 views

Lowering power circuit at data-center, please help clarify what PDU I need

I have the following question: We have a rack at a datacenter with a 208V/60 amp circuit coming into a 208V/60 AMP PDU and I was wondering if we lower the circuit to let say 208V/30 amp or 120/30 amp ...
4
votes
1answer
1k views

PDU says to ground to rack with “thread making screw”.. this is impossible?

I'm trying to use the 'thread making screw' to ground my Dell PDU to the Rack, however the metal on the rack is impossibly hard. Is this even required? The included screws don't even seem "thread ...
6
votes
6answers
291 views

Things to consider when buying PDUs

I am thinking about getting new PDUs for my racks. I would like ones that are: Metered (Maybe remote monitored) Vertical Meet my power requirements (Voltage and amperage) Right number of outlets ...
1
vote
3answers
589 views

Cold Booting a Server over IP KVM - Which Type of PDU is Required?

If I get an IP KVM, what type of Power Distribution Unit (PDU) would I need in order to perform cold boots of a server? Would I need a switched type of PDU or will any PDU be okay? I am looking for a ...
1
vote
1answer
1k views

APC - PDU web-interface demo

Where can i find a demo of the web-interface for Managed PDU's from APC (i'm interested in geting a glimpse at the features) ? Mike.
0
votes
2answers
727 views

How does the Belkin OmniView Remote IP Manager (IP KVM) do Hard Reboots?

I am looking to get an IP KVM for a single server. The features tab on http://catalog.belkin.com/IWCatProductPage.process?Product_Id=291011 shows that the OmniView Remote IP Manager can do hard ...