I don't recall ever seeing an expected 415 voltage reading on my tester in my 30+ years ... 480 sure ..I’m surprised to see so many not familiar with this color code. With the amount of Data Center popping up nationwide, most are using this voltage.
Is this an industry practice.I’m surprised to see so many not familiar with this color code. With the amount of Data Center popping up nationwide, most are using this voltage.
Also shocked to see nothing written as a standard practice.
A=PURPLE
B=TAN
C=PINK
N=GREY
Is this an industry practice.
If so I will add this to my chart for the application.
As I do not do a lot of that work would you share more details on application from trans, feeder to branch.
This way. Prepared when I run across it. Maybe even through some side articals related.
Thank you
In large data centers, the racks and racks full of computers, called “blade servers” (last I was directly involved) each have a power supply and they use 240V input fir the power supplies in order to keep current down. So they design the local in house distribution system as 415Y240V so that they get 240V L-N for each individual power supply, coming from a 3 phase feeder to each rack into a distribution block feeding single pole branch breskers. This way they deliver the lowest current per rack and lowest cost distribution, even though it means a (comparatively) oddball voltage here (it is fairly standard elsewhere in the world).I don't recall ever seeing an expected 415 voltage reading on my tester in my 30+ years ... 480 sure ..
It's a big Industry, one can't know and do it all I suppose ..
how is that 240/415 range derived, similar to 120/208 I suppose.
Sounds a bit British!In large data centers, the racks and racks full of computers, called “blade servers” (last I was directly involved) each have a power supply and they use 240V input fir the power supplies in order to keep current down. So they design the local in house distribution system as 415Y240V so that they get 240V L-N for each individual power supply, coming from a 3 phase feeder to each rack into a distribution block feeding single pole branch breskers. This way they deliver the lowest current per rack and lowest cost distribution, even though it means a (comparatively) oddball voltage here (it is fairly standard elsewhere in the world).
Yes, except here it will 60Hz. But the power supplies don’t care.Sounds a bit British!
Lol, I used to say “at least green is always ground”, but a few weeks ago I saw a 3phase machine from China come in with green as a phase color… that’s not going to age well here I don’t think.After 50 years, one of the few absolutes I've found (at least in the US), there are no consistent standards when it comes to colors - wires, lights, pushbuttons, etc). Never trust a color code. Even when a facility had a color code for phasing and/or voltage, it was never consistently followed.
Yes I know. And now it is 400V/230V here.Yes, except here it will 60Hz. But the power supplies don’t care.
Lol, I used to say “at least green is always ground”, but a few weeks ago I saw a 3phase machine from China come in with green as a phase color… that’s not going to age well here I don’t think.
Should be the same as 208Y/120 no?
-Hal
Kinda ask a bad question.Thank you for the link.
Thanks are for adding information.
I do have a question.
For these would the netural be counted as a CCC impacting feeder conductor sizing.
For UK the residential conductors are brown, blue, and yellow/green. And just 230V and neutral.
It used to red, black, and yellow/green which was much more sensible but the EU screwed that up..................