Tommy Mac Discussions › Forums › Fix-it Forum: Home Improvement & Do It Yourself Repair Forum › Running sheathed electrical cable in unfinished basement/attic through joists › Holes
April 11, 1999 at 4:24 pm
#81467
drhomeGuest
No. You can drill as many as you need without doing any structural damage. Keep them @ 2&1/2″ from all ends, minimum. A 9/16″ hole makes a nice smooth pull for single cable.