May be is the rough in for future solar enegry panel on the roof, that's why it is near the electrical panel. I have similar one in my basement and indicated as solar rough in on my blue print.
the latest update, just confirmed with builder (i didn't expect their reply though):1 I4 O. V) }" S& k: n6 T6 s0 m
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a conduit to the attic. can be run wire for a satellite dish or solar panels. # Q% B# i% C; x \" d# n/ G 3 D# Y9 t; G" |. c! w$ |9 B9 m1 s) H/ X8 ]