voltage label

[reyamkram]

Is the label for the voltages in the picture attached here in this post in the right order? Which voltage comes first? The 240 or the 120?
Thanks,

Mark

 

[electrofelon]

See these threads:

http://forums.mikeholt.com/showthread.php?t=136494

http://forums.mikeholt.com/showthread.php?t=190569

 

[Jraef]

So per the official standards, outlined in those other threads, this is correct because it is a 3 PHASE system, so you always list the L-L voltage first, then the L-N voltage.

 

[electrofelon]

So per the official standards, outlined in those other threads, this is correct because it is a 3 PHASE system, so you always list the L-L voltage first, then the L-N voltage.

It certainly doesn't hurt, but isn't some of the info redundant and unnecessary? Seems like "240/120 three phase" is sufficient? When I have panelboard lables made, I will often order "208y/120 3 phase 4w" but I don't see that the "3 phase 4w" is necessary, but it seems like most people do it.

 

[Jraef]

Redundant? Yeah, sure. But does it hurt to over explain? Given the number of confused people I see posting in forums like this and others I dwell in, there is a lot of misinformation out there and more info is not necessarily a bad thing. In other words there SHOULD be no ambiguity in just saying "240/120 three phase", but there IS no ambiguity in saying "240/120 three phase 4 wire".

And yet, sometimes even that isn't enough...