Ballpark / stadium design

[lammmb]

Hi, junior engineer here i have some questions and im checking a ball park to see if it is NEC compliant.

how do i calculate general lighting? its not on table 220.12

how do i calculate outlet loading? im using 220.14 but not sure

How do i calculate the sport stadium lighting? i looked everywhere but coudnt find anything on the field lights.

I thank you in advance for any help you can provide, if i find an answer i will be posting here as well.

 

[Dennis Alwon]

If you know the load of the lights then you need to use those numbers in your calculations. Receptacles would be at 180va per outlet

 

[lammmb]

If you know the load of the lights then you need to use those numbers in your calculations. Receptacles would be at 180va per outlet

thanks for answering

I dont know the load of the lights, i was going to take the area of the building and get the load of the lights from table 220.12 but there is no stadium there so i cant verify. I only have experience on residential design.

 

[kwired]

thanks for answering

I dont know the load of the lights, i was going to take the area of the building and get the load of the lights from table 220.12 but there is no stadium there so i cant verify. I only have experience on residential design.

Any indoor areas involved may be able to find a similar area in the table (220.12) This would probably be something like a major college or professional sports staduim that has indoor area below spectator seating areas. Otherwise outdoors is pretty hard to get a general lighting load because the needs vary so much from area to area.

Are lumimaires to be used selected yet? Best bet is to select them as needed if you haven't and use the actual load.

 

[Dennis Alwon]

thanks for answering

I dont know the load of the lights, i was going to take the area of the building and get the load of the lights from table 220.12 but there is no stadium there so i cant verify. I only have experience on residential design.

Stadium lighting will probably be much higher than a sq. ft rating. You need to know what the load is of those fixtures. I imagine they will be some of the larger loads unless there is some new led lights that perform as well as the others

 

[kwired]

I have seen high school football fields with just 24 to maybe 32 1000 watt metal halide luminaires to light the playing field. That is 57,600 square feet of field, plus quite a bit of light spills over to adjacent areas and no additional lighting is needed in those areas, but that may be anywhere from 0.5 to 2 VA per square foot just considering the area of the playing field alone. Then if you go to major college or professional football stadiums there is typically many more lights then that for general illumination of the playing field, and a lot of spill over that lights up the open spectator seating.

 

[Ultrafault]

Do you have a blueprint with a schedule? At some point prior to construction and permits you will need one. Calculate off of those. I don't see how you could say it is or is not code compliant if no plans or installs exist.

 

[ggunn]

Stadium lighting will probably be much higher than a sq. ft rating. You need to know what the load is of those fixtures. I imagine they will be some of the larger loads unless there is some new led lights that perform as well as the others

Minute Maid Park (home of the Houston Astros) replaced all their stadium lighting with LED fixtures last off-season. I have been to a few games there this season; they are way bright, noticeably brighter than what they replaced.