mstrlucky74
Senior Member
- Location
- NJ
How would you go about sizing these...is there info in the NEC?
Sizing 13.2kv feeders
- Thread starter mstrlucky74
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fmtjfw
Senior Member
- Location
- Fairmont, WV, USA
310.60, 399 are a couple of places (indoor, outdoor overhead)
Julius Right
Senior Member
- Occupation
- Electrical Engineer Power Station Physical Design Retired
I think for cable runs in cable tray art.392.17(B) and 392.22(C) could be interesting.
pjholguin
Senior Member
http://okonite.com/Product_Catalog/section2/index.html
Click on #8 for 15 kv cable
Table listing for conductor size and ampacity
http://okonite.com/Product_Catalog/section2/section2-pdfs/2-8.pdf
Taken from table:
.Okoguard cables meet or exceed all
recognized industry standards (UL, CSA,
AEIC, NEMA/ICEA, IEEE).
105?C continuous operating temperature
Most of the time when using 600 volt cable, we use cable with 90C ratings but are required to limit ampacity
to the 75C ratings due to termination limits. With 15 kv equipment the termination are rated at a higher temp
allowing the 90C cable rating to be used. You must check terminations to verify temp ratings.
Click on #8 for 15 kv cable
Table listing for conductor size and ampacity
http://okonite.com/Product_Catalog/section2/section2-pdfs/2-8.pdf
Taken from table:
.Okoguard cables meet or exceed all
recognized industry standards (UL, CSA,
AEIC, NEMA/ICEA, IEEE).
105?C continuous operating temperature
Most of the time when using 600 volt cable, we use cable with 90C ratings but are required to limit ampacity
to the 75C ratings due to termination limits. With 15 kv equipment the termination are rated at a higher temp
allowing the 90C cable rating to be used. You must check terminations to verify temp ratings.
Last edited:
kingpb
Senior Member
- Location
- SE USA as far as you can go
- Occupation
- Engineer, Registered
you won't find cable rated lower than 90deg C, i.e. MV-90. But most manufacturers are only making MV-105. MV terminations are good for at least 90 deg C, so even if you use MV-105, it has to be limited to current to keep temp at or below 90 deg C.
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