ELECTRICIAN BORED 4" HOLE through top & bottom chords in attic -- how to fix?
For those that say, “It’s no big deal,” THEY DO NOT UNDERSTAND THE PURPOSE of the double top plate...especially at the perimeter of the house. 

If this occurs at the perimeter of your house, you have a problem, especially if you live in 1) high wind area, or 2) seismically active area. 

Everyone has mentioned why it’s not a problem because it’s not a “truss”. True, but that is for VERTICAL loads. A double top plate is used for many purposes. In your case, the double top plate is used to “tie” the perimeter of all the walls together at the top of the wall for LATERAL loads. 

When a wind load or seismic load is placed on your house, the house wants to “bend” to withstand the force. By cutting through  the double top plate, they have eliminated the chord that resists this bending...we call this “the extreme fiber in bending” in a normal beam supporting a vertical load. That is why it’s important to lap the double top plates a minimum of 4’ and nail the crap out of the lap. 

If your House is 1) one story, or 2)is not located in a high wind area, or 3) small and square and not rectangular, you have less to worry about. Otherwise, I’d have the clown return and fix it. Fixing it can be determined, calculated and detailed by a structural engineer (not a civil engineer) or by an architect with a structural background. 

Btw, get a Building Permit.