Quiz yourself: power industry best practices for fiber deployment

Question page 5 (of 5)

In the questions below, "transmission" refers to installations on lines >100 kV and "distribution" refers to installation on lines < 100 kV. NESC refers to the National Electrical Safety Code which governs all electric utility installations in the U.S. (and any other jurisdictions that adopt it).

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#41. (Transmission) Is your ADSS cable at or above the elevation of any conductors at any point on any span? If so did you do blowout checks at your local worst case windstorm and worst case ice storm to ensure the ADSS would not collide with the conductors (and possibly wrap around them)? Did you do these checks at intermediate wind speeds and ice loads? Did you do ice-storm blowout checks with both ice on and ice-off conditions for your conductors? (Note, these questions don't apply to OPGW in the normal high position; they do apply if you underbuilt with OPGW or a similar metallic cable) (Shortcut to answer page 5)

#42. (Transmission) If you built with OPGW above your conductors, did you do OPGW to conductor clash studies for both ice on and ice off the conductors? (Shortcut to answer page 5)

#43. (Transmission - ADSS only) Did you perform an electric field analysis on all ADSS installations over 100 kV to ensure you won't have dry band arcing problems? If so, did you use isovolt plots or jacket current models or both? Did you correct the isovolt plots for tower line angle and insulator swing angles? Did you use the correct phasing in your model? If it was on a double circuit transmission line, did you run studies with one side de-energized? If another transmission runs parallel to this one in the same corridor, did you check to see if it had an effect on your transmission line? (You're done -- go to answer page 5!)

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