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Replacing a UPS - question on plug types

I need to replace an APC Symmetra LX UPS.  The model has NEMA L5-20R outputs that PDU's are plugged into.  The PDU's are feeding the rack equipment which uses NEMA 5-15 outputs.

In looking at replacements all the models have NEMA L6-20 or NEMA L6-30 outputs.  So I'll need new PDUs to connect to the new UPS.  The PDU's also have different outputs C19 and C13 which is IEC not NEMA.  So I'll need new power cabled for the rack equipment  to plug into the PDUs.

Is the fact that the old UPS has the L5 connections just because its older technology? Or is the L6 conneciton needed to handle additional load?  Or is it something else.

Will my servers work with the C19 and C13 connections.  I'll need different power cables for the servers and other equipment but I'm assuming it will still work.
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8/22/2022 - Mon

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The PDU's have  IEC 320 C13 / C19 outputs.  What the server plugs into on the PDU, isn't that an output?

Yes... a single PDU has outputs, but typically only a single input. Since you were talking plural PDUs, it wasn't clear to me which you were talking about.

There are many different types of cords available to convert between IEC types.
e.g. http://www.amatteroffax.com/itempagey_invid_1285877_d_tripp-lite-7ft-pwr-cord-iec-c13-to-320-c20.html
NEMA locking plugs to IEC
e.g. http://www.lockingpowercords.com/category/6-locking-to-iec-power-cords.aspx?pageindex=3
et cetera.
It's usually more expensive to make your own conversion cords, but sometimes necessary if you just can't find the particular one you need.

Bottom line if I buy this UPS:


Can I use this PDU with an adapter from L5-20 to L6-20R or L6-30R or do I need another PDU with L6 type plug?
Your help has saved me hundreds of hours of internet surfing.

> Can I use this PDU with an adapter
Can you use *what* PDU?

It sounds like you might need one of the cables from
to convert the 250V 4-wire split-phase (typically 1 black 'hot' + 1 red 'hot' - each of 125V - 1 white 'neutral', and 1 bare or green equipment ground) into two 125V sources for your PDU[s].


How many of those PDUs do you want to plug into the UPS?

It would be fairly simple to make a couple 4'' boxes fed by a L6-20P plug, split into 2 circuits on two L5-20R receptacles (in each box), sharing the same neutral (since it's split-phase, the two L5 outlets would be using the neutral on alternate cycles).
That would be able to feed 4 of those PDUs using just the two L6-20R outlets.

Do you have an in-house electrician to make those for you?
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no but I am having a electrician come out tomorrow to quote the hardwire so I'll inquire.  I'll probably just end up buying new PDUs.

That TrippLite UPS lists 5-15/20R ("R" means receptacle).  Why can't you just adapt your L5-20P ("L" means locking plug) to an 5-20P?  You can use a short plug adapter, or have your electrician cut off and replace the twist-lock plug.  If you have wiring experience, and are willing to take on the responsibility, you can do it yourself.  The part is cheap at Grainger or McMaster.