flamedRRider
Member
I have searched my 05 NEC and can't come up with anything. Can anybody point me to the section that states the way for determining ampacities of busbars.
Busbar Ampacity
- Thread starter flamedRRider
- Start date
- Status
flamedRRider
Member
Re: Busbar Ampacity
Thats exactly what I needed. I don't know if I would have ever found it because they are not refered to as "busbars". Thanks.
Thats exactly what I needed. I don't know if I would have ever found it because they are not refered to as "busbars". Thanks.
charlie
Senior Member
- Location
- Indianapolis
Re: Busbar Ampacity
Try 366.23(A)
Try 366.23(A)
hardworkingstiff
Senior Member
- Location
- Wilmington, NC
Re: Busbar Ampacity
Wow dillon, how did you find that, or is it something you ran across before? Great work!
Wow dillon, how did you find that, or is it something you ran across before? Great work!
charlie
Senior Member
- Location
- Indianapolis
Re: Busbar Ampacity
It doesn't pay to get distracted for a period of time and come back without refreshing the screen.
It doesn't pay to get distracted for a period of time and come back without refreshing the screen.
hardworkingstiff
Senior Member
- Location
- Wilmington, NC
Re: Busbar Ampacity
Wow Charlie, you too.
Wow Charlie, you too.
charlie
Senior Member
- Location
- Indianapolis
Re: Busbar Ampacity
Yep, look at the times and the number of responses within 15 minutes!
Yep, look at the times and the number of responses within 15 minutes!
Re: Busbar Ampacity
Have a look here
http://www.copper.org/applications/busbar/ampacity/bus_table1.html
Have a look here
http://www.copper.org/applications/busbar/ampacity/bus_table1.html
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
Re: Busbar Ampacity
Please be aware that the 366.23(A) value is a maximum current density for field installed auxilliary gutters. Do not use these numbers to evaluate all bus bar installations.
Most manufacturers do not use current density to size their equipmnet, instead they rely on heat rise (and air flow) testing done by NRTL like UL. Note table 3 in the link provided by jimmac49. Also, multiple bars per phase ratings are dependent on the orientation and spacing of the bars.
Please be aware that the 366.23(A) value is a maximum current density for field installed auxilliary gutters. Do not use these numbers to evaluate all bus bar installations.
Most manufacturers do not use current density to size their equipmnet, instead they rely on heat rise (and air flow) testing done by NRTL like UL. Note table 3 in the link provided by jimmac49. Also, multiple bars per phase ratings are dependent on the orientation and spacing of the bars.
- Status