30 x 89 26 7 amps we have a different take on the temperatures to use.
How do you raise conduit 10 off a t p o roof.
Try cranking down the roof again.
8 above a roof in a conduit has a temperature adder of 30 which results in 121.
Although looking at it now the 2008 uses shaded sections for new or modified wording so the thin line might just be for new.
Self cutting or self drilling roof fasten ers can readily penetrate metals of these thicknesses.
For example tpo is typically available in 10 x 100 ft.
And in this one sentence lie the benefits and the detriments we face in the roof curb business everyday.
The roof penetration is one of the worst i ever inspected.
If it is not a major effort i would recommend re routing the conduit by attaching it to structural steel other than roof deck.
The addition of the roof might turn the pergola into a porch and therefore you could owe more property taxes to the city or county.
The primary function of the curb is to keep weather out while supporting flashing the equipment on it.
By way of comparison the wall thick ness of 1 2 inch thick metallic conduit is comparable to the metal thickness of a 20 gauge steel roof deck.
Lic conduit embedded within or directly underneath roof assemblies.
This article will discuss the pros and cons of each approach to help you make the best decision for your project.
Sounds like you are only replacing the roof membrane and not the roof deck.
The conduit should have been attached to strucutural members that support the roof deck and not the roof deck itself.
Crank the roof up and level the camper better.
Push on the lifter arm as close to the roof as you can reach without losing your leverage away from the direction the roof is leaning.
Silicone doesn t stick to roofs and an asphalt or butyl based product should have been used.
A big labor saving advantage of single ply is the large roll sizes.
This will take the pressure off the lifter arm.
To fix the conduit appearance the conduit should have been hidden under the solar array before the solar modules were installed.
That results in 143 with a conduit 8 above a roof and the multiplier.
Ideally a flashed connection would be the best practice.
Fiberglass panels will break in hail storms.
The multiplier for 90 wire at 121 is 89.
Conduit exposed to direct sunlight has been determined to be 113.
Also cutting and roof system removal.
Mounting conduit on existing flat roof any time you see a thin black line to the left of a paragraph in the nec it means that it s new or the wording has changed.
Let s start with the simplest system.
