I recently bought a UPS with a 30R plug on it, and sat and tried for about 20 minutes to plug it into what I thought was a 30 socket. It was, in fact, a 20. They're similar enough that if you're looking at the ends you might be convinced that someone has bent a one of the ends of the plug funny, but no amount of trying will make them fit. Malcolm -----Original Message----- From: Jay Ashworth [mailto:jra@baylink.com] Sent: Tuesday, March 18, 2014 4:12 PM To: NANOG Subject: Re: L6-20P -> L6-30R ----- Original Message -----
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. Cheers, -- jra -- Jay R. Ashworth Baylink jra@baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://www.bcp38.info 2000 Land Rover DII St Petersburg FL USA BCP38: Ask For It By Name! +1 727 647 1274