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How to wire up a 240VAC receptacle

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Spork Schivago:
Hello,

I have a device that has an IEC 60309 3-prong 32 amp plug.   It expects a 3-prong receptacle that has neutral, ground, and line.   Because I live in the US, how could I safely wire up the correct receptacle that has neutral, ground, and line, while still providing 240VAC and not violating the NEC?

I have single phase 120-0-120 coming into the house to the panel.

Thanks.

GerryBags:
You need a transformer. We use 120V on work sites in the UK, so there are plenty of 240V-120V "site" transformers knocking around. You could use one of those backwards, but not to the rated current draw as the secondary's likely to be lighter guage.

You really want something more like this: https://www.mtixtl.com/actoactransformer800wmaxdualchange220240v-110120vtf-220110-800-2.aspx

Spork Schivago:

--- Quote from: GerryBags on May 14, 2018, 02:15:41 am ---You need a transformer. We use 120V on work sites in the UK, so there are plenty of 240V-120V "site" transformers knocking around. You could use one of those backwards, but not to the rated current draw as the secondary's likely to be lighter guage.

You really want something more like this: https://www.mtixtl.com/actoactransformer800wmaxdualchange220240v-110120vtf-220110-800-2.aspx


--- End quote ---

Yes, I'd need some sort of step-up transformer.   That's where I'm getting stuck.   I need to go from 120VAC to 240VAC, but with the proper plug.   My device draws up to 7.3KVA but has a maximum rating of 10KVA in the tech documents.   I'm having trouble with figuring out what exact step-up transformer I'd need, what size breaker in the panel, etc.

I can send a pic of the actual plug, if it'd help.   It's blue and has three plugs.   I'd rather be able to plug this directly into the step-up transformer, rather than use some sort of adapter.

I am wondering if there's any way to tear the rack mount PDU apart and rewire it to accept the 120VAC L1, 120VAC L2, and neutral / ground?   Probably not, right?   Essentially, it's not as simple as just switching out the power cord, is it?   The only way is with a step-up transformer?

Spork Schivago:
I'm looking at similar plugs on internationalconfig.com and see stuff that says 2P+E.   I read that means 2 pole plus earth, but does that mean 2 hots and one Earth?   If so, I wonder if my three prong plug expects two 120VACs and one Earth, instead of one 240VAC, earth, and ground?  The document on the PDU doesn't say much.   The model of the PDU is HPE P9S16A.

It was listed as Single-Phase international.   It was the only one that fit the requirements we had.   We couldn't get three phase ran here because of the price.  My plug has the 2P + Earth symbol written on it.

Spork Schivago:

--- Quote from: edavid on May 14, 2018, 03:19:45 am ---No, you don't need a transformer.  You just wire the device hot and neutral to the incoming split phase lines.
This is how every 240V device works in the US.

--- End quote ---

But what if the device isn't a US device?   Do you see what I'm saying?   I see the IEC 90603 IP44 32-Amps are a European connector.   In the US, we have 15 amp, 20-amp, 30-amp, etc breakers.   We generally don't have 16-amp or 32-amp breakers.   In Europe, they don't have two 120VAC lines like we do, I don't think, and this is the problem.   I believe the plug expects a ground, a neutral, and a 240VAC hot, not two 120VAC hots

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