Paralleled Conductors
- Thread starter drickert
- Start date
- Status
- Location
- Massachusetts
Re: Paralleled Conductors
Do you plan on keeping them in separate raceways?
For a full 1,200 amps 3 sets of 600 kcmil copper or 4 sets of 500 kcmil aluminum in separate raceways will do it.
[ December 06, 2005, 07:59 PM: Message edited by: iwire ]
How many sets do you want to run?
Do you plan on keeping them in separate raceways?
For a full 1,200 amps 3 sets of 600 kcmil copper or 4 sets of 500 kcmil aluminum in separate raceways will do it.
[ December 06, 2005, 07:59 PM: Message edited by: iwire ]
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Re: Paralleled Conductors
Are there any significant distances involved, such that voltage drop becomes a possible issue?
Are there any significant distances involved, such that voltage drop becomes a possible issue?
- Location
- Massachusetts
Re: Paralleled Conductors
I got a PM from drickert explaining his situation more.
He really wanted to find a way to 'fit' 1,200 amps of aluminum conductor in two 4" raceways.
My response was that it was not possible and offered a suggestion of doubling the voltage to get the equivalent KW through the raceways.
If anyone has some more suggestions please add them, maybe I am missing something.
Bob
I got a PM from drickert explaining his situation more.
He really wanted to find a way to 'fit' 1,200 amps of aluminum conductor in two 4" raceways.
My response was that it was not possible and offered a suggestion of doubling the voltage to get the equivalent KW through the raceways.
If anyone has some more suggestions please add them, maybe I am missing something.
Bob
- Location
- Illinois
- Occupation
- retired electrician
Re: Paralleled Conductors
Bob,
I think it can be done using compact strand conductors. Twelve compact strand 250kcmil will fit in 4" rigid. That would let you have 4 sets of 3 conductors in each raceway. The grounded conductor is not current carrying so we have 8 current carrying conductors and a derating of 70%. 250kcmil aluminum is 230 amps at 90C leaving 161 amps after derating. That would give you 644 amps per raceway. Note that if the raceway in not metallic, this solution won't work as EGCs would be required and they won't fit.
Don
Bob,
I think it can be done using compact strand conductors. Twelve compact strand 250kcmil will fit in 4" rigid. That would let you have 4 sets of 3 conductors in each raceway. The grounded conductor is not current carrying so we have 8 current carrying conductors and a derating of 70%. 250kcmil aluminum is 230 amps at 90C leaving 161 amps after derating. That would give you 644 amps per raceway. Note that if the raceway in not metallic, this solution won't work as EGCs would be required and they won't fit.
Don
- Location
- Massachusetts
Re: Paralleled Conductors
Pretty neat Don.
I do not know the raceway type (or length).
I believe he was talking service entrance conductors so the EGC may unneeded.
Pretty neat Don.
I do not know the raceway type (or length).
I believe he was talking service entrance conductors so the EGC may unneeded.
- Status