Electronics > Beginners
How to wire up a 240VAC receptacle
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IanB:

--- Quote from: Spork Schivago on May 18, 2018, 04:51:48 am ---I got hurt in the Marine Corps.   It caused some brain damage.   My brain doesn't work the same way as other people, so it's hard to word things properly or talk properly sometimes and I cannot get the right words out, no matter how much I try.   This makes it frustrating and people always think I'm being an ass, but I'm not trying to be, I'm just trying to explain it the best I can.
--- End quote ---

Don't worry about it. There's nothing wrong with what you've been saying, it's just that what you are doing is so far outside normal expectations that people are having trouble understanding. People don't normally try to set up a commercial data center in their basement.
oPossum:

--- Quote from: IanB on May 18, 2018, 04:38:29 am ---HP expects commercial power to be available in North America in two flavors of single phase: either 120 V AC ("low-line") or 208 V AC ("high-line"). The 208 V power would be derived from one leg of a three phase transformer and would be true 208-0 V single phase line to neutral.

--- End quote ---

240 and 480 phase to phase is also common commercial power.

208 is phase to phase, not phase to neutral. Phase to neutral is 120.

That is why there are two pole breakers on those PDU.

240 phase to phase would not be a problem.
IanB:

--- Quote from: IanB on May 18, 2018, 04:51:11 am ---
--- Quote from: Monkeh on May 18, 2018, 03:52:21 am ---Change your PDUs for the type with double pole breakers and use your existing supply, or have an electrician (yes. really. please don't do it yourself.) install the transformer. Either will work.
--- End quote ---

It's not clear that there are any HPE PDUs with double pole breakers. The HPE literature divides the product range into two categories: NA/Japan which expects 200-208 V AC single phase, or INTL which expects 220-240 V AC single phase. In either case it is clear that this voltage is measured line to neutral, as is typically found in commercial premises.

--- End quote ---

OK, I stand corrected. The P9S13A does have a double pole breaker, as listed here: https://h20195.www2.hpe.com/v2/GetDocument.aspx?docname=a00002909enw

So it does appear that 240 V line to line or phase to phase should be acceptable for this particular PDU.

IanB:

--- Quote from: oPossum on May 18, 2018, 05:17:44 am ---208 is phase to phase, not phase to neutral. Phase to neutral is 120.

That is why there are two pole breakers on those PDU.
--- End quote ---

I see. Makes sense.
Bratster:
@Spork

What are you not clear on understanding of how to wire up the Transformer?

The drawing I sketched out gave you the basics of what is going on with it.

Let's stop beating this dead horse.

Whether we like it or not you need a 240-volt line to neutral power service.

The only way you're going to get that from your existing house supply is with a Transformer.

So focusing on that point, what are you having trouble understanding so that everybody can help you out in that aspect?


PS. This post was not meant to come off as offensive or anything like that, I'm sleepy and it looks like this thread is starting to go in circles again.

Night all

Sent from my Moto x4 using Tapatalk

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