![]() ![]() In most cases, the hole size should be at least 1/2″ larger than the diameter of the wiring. For example, if the wiring is 1/2″ in diameter, the hole should be at least 5/8″ in diameter. When drilling holes in masonry or concrete, the hole size should always be larger than the diameter of the electrical wiring. Once the hole is drilled, it is important to wear safety glasses to avoid any debris flying into the eyes. This will help to avoid drilling into any other structural components. It is also important to use a stud finder to locate the studs in the wall before drilling. When drilling a hole in a stud for wiring, it is important to take measurements to ensure that the hole is the correct size.
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