480V feeder through 12KV manhole
480V feeder through 12KV manhole
(OP)
Is it possible to have a 480V feeder run through a 12KV vault if you use 12KV cable?
DJR
DJR
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
Download nowINTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
480V feeder through 12KV manhole
|
RE: 480V feeder through 12KV manhole
RE: 480V feeder through 12KV manhole
I guess back to my original question, can you run 480V with 15KV conductors through a vault with a 12.47KV switch and conductors? As long as the insulation rating on the conductors are the same, aren't they allowed to be in the same enclosure/raceway?
DJR
RE: 480V feeder through 12KV manhole
"In motors, switchgear and control assemblies, and
similar equipment, conductors of different voltage ratings
shall be permitted."
If the 15 KV cable and low voltage cable are connected to the same motor or same switchgear cell shall be permitted
"In manholes, if the conductors of each system are
permanently and effectively separated from the conductors
of the other systems and securely fastened to racks, insulators,
or other approved supports, conductors of different
voltage ratings shall be permitted.
Conductors having nonshielded insulation and operating
at different voltage levels shall not occupy the same
enclosure, cable, or raceway."
If the "vault" is a manhole in the above conditions it is permitted.
RE: 480V feeder through 12KV manhole
I have been trying to see if there is another section that would prohibit the 480V feeders from entering the manhole if the feeders are for standby and emergency. The 480V feeders are from a generator located outside the building. Do you happen to know if there is any other regulations that would prohibit this?
Thanks for the help.
DJR
RE: 480V feeder through 12KV manhole
DJR
RE: 480V feeder through 12KV manhole
DJR
RE: 480V feeder through 12KV manhole
RE: 480V feeder through 12KV manhole
Seems like this would meet your needs:
http://www.houwire.com/products/products.asp?catid...