Electrical Inspection
From Open Source Ecology
Rough
Practical Notes
- All cable runs must be visible, so this must be done in a manner than any insulation/housewrap/sheathing does not obscure wire runs [2]. [3].
Guidelines
- No devices are installed, just wires and boxes
- Plug holes between floors with insulation of fire block foam to prevent fire spread [4]
- All wires have wire nuts on them at rough-in
- Wires cable-stapled to studs
- Wires 1.25" below surface, or need protective metal plates. [5]
- Check appropriate conductor fill of boxes. [6]
- Rough-in electrical has wires run and boxes attached, wires sticking out 8" and attached to box, with at least 1/4" of insulation after the attachment to box. Use large boxes so you always have enough room for the necessary wires.
- Cable anchors 8" from box and no more than 4' spacing thereafter [7]
- The horizontal runs should be at least 20 to 24 inches above the floor - [8]
- Wire labeling: Although not required by code, some electricians and savvy homeowners label the wires the electrical boxes to indicate the circuit number and the amperage of the circuit. An inspector is greatly reassured when he or she sees this kind of detail in a wiring installation.
- Isolated ground receptacles are not needed with plastic electrical boxes. [9]
- Wall switches are at 48" to bottom of the outlet box. [10]
- Standard height of wall outlet boxes is 12 to the bottom. [11]. For the Seed Eco-Home 2, we should make it 2" above the edge of the interior wall panel - so 12+1.5+2=15.5" above floor.
- Height of wires - no set height - [12]
- Receptacle location - any wall of 2' or more in length must have one. A receptacle must be within 4' of any opening (such as door) then 12' after - [13]. For a wall less than 12' between opening - one receptacle within 6' of each opening will do.
Final
- Example walk-through - [14]
