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Holes through Wood Studs
Ref. NEC Section 300.4(A)
(Illustration 3-1)
3
1
/2"
1
1
/4"
Less than 1
1
/4"
ENT
ENT
...or...
Edge of bored hole
not less than 1
1
/4"
from nearest edge
of stud
If hole is less than
1
1
/
4" from nearest
edge, a steel plate
1
/
16" thick must be
used to protect ENT
against driven nails
or screws.
Notches in Wood Stud
Section 300.4(A). Clearance for ENT through wood studs.
Ref. NEC Section 300.4(A)(2)
(Illustration 3-2)
3
1
/2"
1
1
/4"
ENT
Edge of notched
hole not less than
1
1
/4" from nearest
edge of stud
1
/16" steel plate