12470

[ERIC LEDBETTER]

In The Past 12470 I Have Ran In Rigid Now Being Asked To Run In Emt Conseald In A Wall What Do You Think?

 

[George Stolz]

Eric, welcome to the forum. Please do not type in all caps (as it appears you tried to do), it's perceived as shouting. The forum software's automatic attempt to mute the shouting is equally distracting.

What is a 12470? :-?

 

[frizbeedog]

What is a 12470? :-?

...a primary voltage?

 

[ERIC LEDBETTER]

12,470v

12,470v

12,470volt main primary feeder to servic a convention center

 

[crossman]

Yes, 12,470 volts is just another voltage that is fairly common as for large buildings. For example, the huge convention center here in town has a 12,470 volt service with feeders run to distribution centers in many locations in the building. These distribution centers have built-in 12,470 to 480Y/277 xfmrs and 12,470 to 208Y/120 xfmrs. Pretty slick set-up and allows for large amounts of power to be sent throughout the building with fairly small feeders albeit with the fancy-shmancy high voltage shielded cables.

I'm looking to see if there is an issue with the EMT. I think the convention center used rigid for those feeders.

 

[crossman]

300.37 allows EMT to be used for over 600 volts.

 

[Huevos]

I've run miles of 12,470 in duct banks. Never run it inside a building though. Interesting, I know I'd feel better if it were in GRC or at least IMC.

 

[BAHTAH]

12470 In EMT

12470 In EMT

In The Past 12470 I Have Ran In Rigid Now Being Asked To Run In Emt Conseald In A Wall What Do You Think?

Look at 300.37 2008 NEC. Remembering the NEC is the minimum standard. I don't remember ever seeing 12470 run in EMT but that is something left to the specifing Engineer.