Chapter 5 Wiring Methods 59
Copyright Goodheart-Willcox Co., Inc.
Figure 5-2. Conductors running through framing members must be protected. A—Holes bored through framing members must be
at least 1 1/4″ from the edge of the member. B—Notches must be covered by a metal plate to protect conductors from nails and
screws. C—Guard strips must be at least as high as the cable they protect.
Figure 5-3. Condensed version of Table 300.5 from the Code.
Minimum Burial Depths (1000V or less)
Cables or IMC or Rigid Rigid Nonmetallic
Conductors Metal Conduit Conduit
Below streets, alleys, and parking lots 24″ 24″ 24″
Below building slab or foundation (in raceway) 0″ 0″ 0″
In trench below 2″ thick concrete or equivalent 18″ 6″ 12″
Under one- or two-family dwelling driveway 18″ 18″ 18″
Location of Wiring Method or Circuit
1 1/4″ minimum
A
Metal plate
1/16″ thick
B
Guard strips
C