110v-240v AC/DC Power Supply to USA 240v Socket?


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Old 10-11-17, 07:35 AM
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110v-240v AC/DC Power Supply to USA 240v Socket?

I have a 240v socket near my band saw, as well as AC/DC power supplies rated 110-240v. Assuming I get an adapter (adapter, not transformer), is this compatible?

From what I can tell, yes. But, results online are geared for the UK, so I'd rather be safe than sorry.
 
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Old 10-11-17, 09:13 AM
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You can run that power supply on your 240v receptacle but adapters are not available for all 240v receptacles. An adapter that converted 240v to 120v could be a dangerous thing to leave plugged in.

For most of the inline power adapters you would purchase a 240v power cord.
 
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Old 10-11-17, 09:19 AM
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I agree that an adapter is a dangerous way to go. An adapter would have a 120 volt socket that anything could plug into. All it would take is forgetting once and plugging in something that isn't 240 volt compatible and it would be fried.
 
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Old 10-11-17, 09:24 AM
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That answers my question. I have had the same concerns about an adapter being dangerous, so I had plans of adding bright orange warning labels all over it. But, your note about using a dedicated power cord with the right plug makes a lot of sense.

Thanks for the advice.
 
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Old 10-14-17, 08:52 AM
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That is a struggle I know, and have solved by using an adapter and glued that adapter to the multi voltage unit.
That happens when we here in Norway (230V 50 Hz) buys equipment made in fa east, it sometimes comes with US plug but are rated for 100-240V. If the unit has a cord with flat pin plug, I cut it off and put on a local plug.

Example of the glue solution on my picture, these adapters are not for more than a few watts, pretty simple low quality.

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Old 10-14-17, 11:34 AM
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Example of the glue solution on my picture, these adapters are not for more than a few watts, pretty simple low quality.
The only issue is there are no simple adapter available for US 240V, which usually are NEMA 6-15 or NEMA 6-20.

It is possible to make one and this basically is making a cord with right plug and outlet. I guess you could glue this cord to an adapter and be safe.

If you choose to supply 240V to 120V outlet for some reason, make sure to mark it very clearly. I have burnt my equipment once because someone did this and there were no warning sign anywhere.
It was in a server room and someone thought it is a good idea to connect 120V power strip to 208V UPS and use that power strip to power network equipment with 120V plugs on the power adapter. I did not realize that until it was too late. At least it wasn't very expensive equipment.
 
 

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