Edge clearance for wires in studs and joists

Electrical · Knob-and-Tube Wiring · printed page 101 (PDF page 102)

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Book index entries

Clearance – from Edge of Studs and Joists Electric Wire – in Studs and Joists – Clearance from Edges

Text in the illustration

protective metal plate is required if wire is within 1-1/4" of stud face
1-1/4" of clearance required
stud

Generated explanation

The illustration shows two electrical cables passing through drilled holes in a wood stud. At the upper penetration, a protective metal plate covers the narrow stud face adjacent to the cable. The annotation requires this plate when the wire is within 1-1/4 inches of the stud face. The lower penetration illustrates the required 1-1/4-inch edge clearance without a protective plate.

Components

wood stud electrical cables drilled cable holes protective metal plate

Materials

wood metal cable insulation