http://www.dslreports.com/forum/electronics Electronics forum current topics en Copyright 2007, dslreports.com Thu, 20 Nov 2008 03:44:31 EDT Thu, 20 Nov 2008 03:44:31 EDT http://i.dslr.net/bbrdisc1.gif http://www.dslreports.com 19 18 bbr disc http://www.dslreports.com/forum/remark,21453537 http://www.dslreports.com/forum/remark,21453537 2008-11-19 18:29:40 http://www.dslreports.com/forum/remark,21423446 $150), then i am going to junk it. all help is appreciated.]]> http://www.dslreports.com/forum/remark,21423446 2008-11-13 16:50:58 http://www.dslreports.com/forum/remark,21442437 http://www.dslreports.com/forum/remark,21442437 2008-11-17 18:25:59 http://www.dslreports.com/forum/remark,21410556 http://www.dslreports.com/forum/remark,21410556 2008-11-11 12:59:20 http://www.dslreports.com/forum/remark,21419507 http://www.dslreports.com/forum/remark,21419507 2008-11-12 21:23:11 http://www.dslreports.com/forum/remark,21407461 neutral = 120v. Leg to leg = 208/240? We have several large switches which are supplied with 240v...but now that i'm thinking, they could be 208v. I haven't measured it. What is this setup called? Is it possible to have this arrangement and have 120/240, or do I have 120/208? Before any circuits are installed the master electrician has read the hardware nameplates and done the installation. Now, going back to building's panels. 200a - 600a large breakers feed 1+ panels. I don't want to refer to them as 3p, but they have three "legs" inside of them. I've seen the inside of one (vault was completely shut off). At the bottom there were dials to which you could adjust the "trip current" from something like 20% to 140%. So this makes me think that there are 3 hots coming out of this breaker. Jump up to the panel. There are 4 conductors. 3 hots and a neutral. Again - any phase to neutral is 120v. What confuses me about this setup is that there could also be 3 breakers tied together for say an air handler. What would those 3 voltages be? 240 hot/hot or 120 hot/neutral? Where would the transformer be in this setup? 15kv - transfer switch - transformer - breakers - panels? But then again, there are actually devices which DO use 3p 480v in the building. Several blower fans I have seen do. So i'm guessing those just use a 15kv - 480 3p transformer? While I don't expect to be an expert after an explanation, i'm just curious as to what this setup is called. Sorry for the winding post, thanks!]]> http://www.dslreports.com/forum/remark,21407461 2008-11-10 20:33:51 http://www.dslreports.com/forum/remark,21394167 http://www.dslreports.com/forum/remark,21394167 2008-11-07 21:42:07 http://www.dslreports.com/forum/remark,21410624 http://www.dslreports.com/forum/remark,21410624 2008-11-11 13:15:29 http://www.dslreports.com/forum/remark,21342423 http://www.dslreports.com/forum/remark,21342423 2008-10-29 02:36:26 http://www.dslreports.com/forum/remark,21399851 http://www.dslreports.com/forum/remark,21399851 2008-11-09 11:12:58