All,
I've been charged with getting a getting an old HP 6268B operational for my lab. It's wired for 208V (although it can be wired for 230/120 if so desired, as long as the plug is rated for it. However it would require a 24A 120V socket, so I can't easily switch it to 120 or else I would.)
However, I wanted to make SURE that it was wired correctly for 208, instead of the 230 it ships with (according to the manual). So I took it apart and made sure that all the taps were connected correctly etc. (They were.)
However, I've run into a problem. The 208V plug in our lab is a Nema 6-30. The plug that was on the power supply was a nema L6-30. (Essentially the locking version of the normal 6-30.) The 6268B calls for a ground, neutral, and hot. However, Nema (L)6-30 plugs are wired with 2 hots and one ground.
Anyway, I'm hesitant to just plug in the plug with the two hots because the manual says "make sure not to switch ac and acc" (hot and neutral). I mean, technically there is 208V between the two contacts of the plug regardless of whether you have two hots or one hot and a neutral. (Assuming it's wired correctly.) So, a voltage potential is a potential, regardless of how it gets "made"...
I can't rewire the outlet in the lab unless I want to pay facilities management a few thousand dollars to do it (yes, it's a rip off, I know, don't get me started.)
Anyway, would it be OK to just plug it in with the Nema 6-30 (and therefore, two hots)? I'm assuming the warning is in the manual so that you don't hook it up backwards. Is there anything I should be careful of?