Wire Size Temporary Installation
- Thread starter elevate
- Start date
- Status
Pierre C Belarge
Senior Member
- Location
- Westchester County, New York
elevate said:
Yes, from 14AWG - 2000 kcmil :wink:
mdshunk
Senior Member
- Location
- Right here.
Yeah, you really gotta be careful and keep your eyes peeled. So many guys are trying to sneak in the use of that 2001 kcmil for their temp installs.Pierre C Belarge said:
peter d
Senior Member
- Location
- New England
mdshunk said:
Yeah...copper no less.
- Location
- Massachusetts
elevate said:
It happens the company I work for does this all the time for a power company.
We generally use 4/0 portable power cable run in parallel sets. Keep in mind that the ampacity chart for that cable is not 310.16 but 400.5(B). For example the 4/0 cable we use is rated 360 amps @ 75C.
Here is an example
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
Some guys get to have all the fun!iwire said:
- Location
- Massachusetts
LarryFine said:Some guys get to have all the fun!
It is an interesting diversion.
One minute I am home sleeping, the next thing I know I am driving two hours to connect 2MW genset to a rock crusher at 1AM in a dark gravel pit.
We work for the generator rental company, they call and give us an address when we get there the equipment is usually sitting waiting for us to connect.
brother
Senior Member
I always thought these temporary installs had to us more tuffer type of cable when ran like this. Is this just the same type of 4/0 cable you would use if you were putting in perminant installs in conduit??
mdshunk
Senior Member
- Location
- Right here.
Sounds a lot like some alien abduction stories.iwire said:
- Location
- Massachusetts
brother said:
It is portable power cable, it's like welding cable with a 600V rating. :smile:
I would hate to have to pull it in conduit as the insulation is rubber and does not slide well. A 50' section weighs just under 60 Lbs.
- Location
- Massachusetts
mdshunk said:Sounds a lot like some alien abduction stories.
:grin: :grin:
.......................
- Location
- Illinois
- Occupation
- retired electrician
Bob,
Per Table 400.5(B) I would not accept 360 as the ampacity of those cable where installed as shown in the photos. I am not sure what the ampacity would be as the table does not directly cover your installation.
Per Table 400.5(B) I would not accept 360 as the ampacity of those cable where installed as shown in the photos. I am not sure what the ampacity would be as the table does not directly cover your installation.
jeremysterling
Senior Member
- Location
- Austin, TX
I worked with a ex college football lineman who rolled this stuff up like it was a 14/3 extension cord. All I had to do was untwist the camlocks.
Thank you all for the help. I have not seen paralled 4/0 for a temp install
running above the ceiling and strapped with tie wraps. My self I would run conduit in open ceiling just becuse I am weird. AS of now we don't know how much time the utility needs to set their new transformer. The pics are great.
running above the ceiling and strapped with tie wraps. My self I would run conduit in open ceiling just becuse I am weird. AS of now we don't know how much time the utility needs to set their new transformer. The pics are great.
quogueelectric
Senior Member
- Location
- new york
What is the address again????iwire said:It is portable power cable, it's like welding cable with a 600V rating. :smile:
I would hate to have to pull it in conduit as the insulation is rubber and does not slide well. A 50' section weighs just under 60 Lbs.
- Location
- Massachusetts
don_resqcapt19 said:
Why do you say that?
- Location
- Illinois
- Occupation
- retired electrician
Bob,
Because of note 1 that applies the column D ampacities.
Because of note 1 that applies the column D ampacities.
It appears to me that the individual conductors are in contact with each other for more than 24" in many places in the picture. I don't see any column ampacities that apply directly to the installations in your photos.
- Location
- Massachusetts
don_resqcapt19 said:
That was the only issue I could think of. :smile:
Truth be told we add them up as 400 amps. If the service is 2000 amps we would run 5 sets of these cables. Then when when we fire up the service we check the actual load which will normally be at it's max as the buildings HVAC load will be struggling to return the building to proper temps.
But..... IMO the NEC does not apply to the work we do, we are indirectly contracted by the utility and as you can see our work is on the utility side of the service point.
Many may not agree with that but I have yet to run into an inspector that had any interest in how we do it.
- Status