From: "Randy" <amps@djlab.com>
I have a situation where a 208v/20A PDU (L6-20P) is supposedly hooked to a 208v/30A circuit (L6-30R). Before I order the correct PDU's and whip cords...sanity check...are connectors 'similar' enough that this is possible (with force) or am I going to find we've actually got L6-20R's on the provider side? As it happens, the chart at
http://www.stayonline.com/reference-nema-locking.aspx
suggests that the L6-20 and L6-30 are less different than you'd expect.
I *think* those are on different diameters, and a datacenter employee ought to friggin' know better... but I don't think it's 100% impossible that this has happened.
If it did, you're gonna replace the plug anyway...
As long as there's a 20A breaker on the PDU, you're safe, if not within code. From experience with some electricians who couldn't follow simple written instructions, it is physically possible to put an L6-20 plug into an L6-30 receptacle. But it won't lock into place. Beyond all the other reasons it's not recommended, the slightest bump of the cable will
On 3/18/2014 6:11 PM, Jay Ashworth wrote: likely knock it loose causing whatever is on there to drop. (Cue electricans knocking the production 6506E's offline 3 times in 20 minutes while they were replacing the breakers and the supposedly redundant power cords...) If you can unplug it to look, every one I've ever seen has had the voltage and amperage clearly molded into the face of it. Jeremy "TheBrez" Bresley brez@brezworks.com