gary
Senior Member
- Location
- California
- Occupation
- Retired electrical contractor / general contractor
Question I have (5) runs of parallel 3" EMT Conduits Each with (2) Sets of 400Kcm Alum & (1) #350 Gr Alum the run is 535 then 90Deg 35' for a total of 570' this run uses Cooper B-line Dura-Blocks for support on the roof at 8' apart 6" off of roof 3 x 3 x 12 on each end, My Inspector is requesting Expansion Couplings, I have never heard of this on a roof and what would be the Calculation for this , the area is Ontario, Ca Max ASHRAE for this area is 98Deg F (2% Wet Bulb Summer , Can not find Winter ? Need Help:angel: