Electronics > Beginners

How to wire up a 240VAC receptacle

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Gregg:
I have been following this thread since I posted and there is a lot of confusion that would be a lot clearer if you just posted exactly what it is that you are trying to power. If you don’t have it yet, post some links. 
I believe that all of the IEC 60309 plugs can be easily taken apart and removed from the power cord and reinstalled if necessary without anyone being the wiser.
It is good that you bought the 40 amp two pole breaker and are going to wire it with 8ga wire.  Most 120/240 volt breakers are only rated for continuous loads of 80% of their advertised rating.
If the device has sub breakers that are single pole, perhaps they can be changed to two pole.  Or post some pictures here with details and we may be able to help make it compliant in intent if not with actual approved breakers and wiring techniques. 
Is this going to be in some location that needs to be UL listed?  If so you are in for a rough and expensive time; I’ve been there.

Bratster:
He has already given the model of the device twice, it's a rack mount power distribution unit.

HPE P9S16A PDU

I think that is the elephant in the room that's not being talked about, will this device still be safe if it is fed two Lines as opposed to a line and a neutral.

With the OP so concerned about changing the plug voiding the warranty, I think he is missing the bigger issue, will feeding this pdu two lines void the warranty?

And besides that will it even be safe?


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Gregg:
Sorry I missed the actual device.  The problem is the single pole 16 amp breakers
I think I would have gone with two of the P9S13A PDUs and saved a lot of trouble

vk6zgo:

--- Quote from: Bratster on May 15, 2018, 04:48:45 am ---He has already given the model of the device twice, it's a rack mount power distribution unit.

HPE P9S16A PDU

I think that is the elephant in the room that's not being talked about, will this device still be safe if it is fed two Lines as opposed to a line and a neutral.

With the OP so concerned about changing the plug voiding the warranty, I think he is missing the bigger issue, will feeding this pdu two lines void the warranty?

--- End quote ---
I see no reason whatsoever for it to void the warranty.
The internal circuitry has no way of knowing whether it is being run off 240v between Active & Neutral, or 240v across the secondary of a pole transformer, & will operate in the same manner in both cases.


--- Quote ---
And besides that will it even be safe?
Sent from my Moto x4 using Tapatalk

--- End quote ---

The insulation between "hot" & ground will be under less stress (120v instead of 240v), so that will not cause any safety issues.

The only possible safety problem would be if the device only uses an SPST Mains switch, so that one leg of the supply will still present 120v w.r.t ground inside the device.

Bratster:

--- Quote from: vk6zgo on May 15, 2018, 07:55:55 am ---
--- Quote from: Bratster on May 15, 2018, 04:48:45 am ---He has already given the model of the device twice, it's a rack mount power distribution unit.

HPE P9S16A PDU

I think that is the elephant in the room that's not being talked about, will this device still be safe if it is fed two Lines as opposed to a line and a neutral.

With the OP so concerned about changing the plug voiding the warranty, I think he is missing the bigger issue, will feeding this pdu two lines void the warranty?

--- End quote ---
I see no reason whatsoever for it to void the warranty.
The internal circuitry has no way of knowing whether it is being run off 240v between Active & Neutral, or 240v across the secondary of a pole transformer, & will operate in the same manner in both cases.


--- Quote ---
And besides that will it even be safe?
Sent from my Moto x4 using Tapatalk

--- End quote ---

The insulation between "hot" & ground will be under less stress (120v instead of 240v), so that will not cause any safety issues.

The only possible safety problem would be if the device only uses an SPST Mains switch, so that one leg of the supply will still present 120v w.r.t ground inside the device.

--- End quote ---
Except this is not just one device, it is a power distribution unit, so it is supplying power to multiple devices.

If it is expecting only one hot line, and it only provides circuit protection on that one line, then you have 120v on the neutral wire of each outlet with the full 32-40amps available.



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