[Shop-talk] Determine NEMA outlet type if it’s plugged in?

[jamesf at groupwbench.org]

Yes, twist lock. The devices in question are UPSs, and are 2880va, 120v 
units. And it may be confirmation bias, but 2880va/120v = 24a, which is 
80% of 30a, the standard derating. So I'm inclined to believe they are 
L5-30, especially since one unused one in the rail of 10 outlets is 
(local guy was able to unplug an unused unit). Does that make sense or 
am I thinking wishfully here (I have an order ready to go for mew ones 
with L5-30 plugs, just waitng for the outlet specs).

jim

On 2025-04-09 16:15, DAVID MASSEY wrote:

> Are these the TwistLock variety?  If so many of them look very similar 
> but have subtle differences making them incompatible with other styles. 
>  This is to make a 120V/20 amp different from a 220V20 amp so as to 
> avoid the possibility of plugging a 120V device into a 220V circuit.  
> Or a 120V 30A device into a 20A circuit.
> 
> You might be able to determine what styles you need from the nameplate 
> ratings on the powered device.  In other words is it a 120V or a 220V 
> device?  Of course if it dual voltage device it may be ambiguous.
> 
> Dave
> 
> On Wednesday, April 9, 2025 at 10:03:22 AM CDT, Jim Franklin 
> <jamesf at groupwbench.org> wrote:
> 
> I'm dealing with a bunch of Schroedinger's outlets here. All the 
> outlets are in use so I can't unplug them to look at the NEMA marking, 
> but I need to replace the devices plugged in, which can be ordered with 
> various plug types. Is there a way to tell from the outside what type I 
> have? It's round, which narrows it down to a few...
> 
> Thanks,
> Jim
> _______________________________________________
> 
> Shop-talk at autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation  $12.96
> Archive: http://www.team.net/pipermail/shop-talk 
> http://autox.team.net/archive
> 
> Unsubscribe/Manage: 
> http://autox.team.net/mailman/options/shop-talk/dave1massey@cs.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/shop-talk/attachments/20250409/81ebb456/attachment.htm>