gadfly56
Senior Member
- Location
- New Jersey
- Occupation
- Professional Engineer, Fire & Life Safety
For the wireway fill, there is also an exception for stage lighting and circuits - no derating no matter how many wires you put in a wireway as long as 20% fill isn't exceeded.
Granted, stage lighting usually has so many branch circuits that they probably won't ever all be used at full load at once, but it seems like another arbitrary rule.
I have one project with over 150 20A branch circuits going up to above. Those could all be in a single wireway.
Heh. You should have seen some of the light plots I designed in my community theater days. Fortunately, unless you're doing A Long Days Journey Into Night, you are never likely to have a show run long enough for the 3-hour rule to kick in.