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I have a computer power supply (PSU), input voltage is 120-240V, I assume I can safely plug it into a 240V outlet. I have one those outlets in my garage, problem is that it is 6-20R type receptable and the PSU plug is 5-15P and does not fit. What should I do while being code-compliant? Change the 6-20R receptacle to a 5-15R and label it with 220V? Or, is there something like a 6-20R to 5-15R adapter that could be used? Please advise.

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  • Make sure your computer power supply is auto switching (120/240V) if not there should be a slider switch on it for the input voltage change (no slider switch with those input voltage specs means it is auto-switching) . Most new units are auto switching - but just in case .. you should verify it.
    – Ken
    Mar 31, 2018 at 7:24
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    Understood. I have 4, 2 are auto-switching, 2 are manual. Thanks Apr 1, 2018 at 13:47
  • Hey! On the same topic. It is easy to find surge protectors strips for connecting multiple appliances on 120V. I have struggled to find the same for 240V. Am I losing surge protection if I connect directly to the 240V without one? Are 240V surge protectors available, where? Apr 1, 2018 at 13:49

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Assuming that your computer power supply accepts its power through a C13 socket, you could use a pigtail to make the connection.

Example: 6-20P to C13 Power Cords

Cables like this are commonly used in data centers to get 240V tolerant equipment attached to the rack PDU.

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