Electrical Rough-In: Complete Guide
Overview
Many owner-builders successfully wire their homes, saving $4,000-$8,000 in labor. It requires careful planning, code knowledge, and attention to detail, but the work itself is straightforward.
- Typical Duration: 1-2 weeks
- DIY Difficulty: ⭐⭐⭐⭐☆ (4/5)
- Typical Cost: $8,000-$18,000 (2,000 sq ft house)
- When to Hire: Many owner-builders DIY with code study
- Required Inspection: Yes - critical safety inspection
Electrical rough-in installs all wiring, boxes, and panels before walls close. This is highly code-regulated for safety reasons. Electrical fires cause billions in damage annually - proper installation prevents tragedy.
When This Phase Happens
Electrical rough-in happens after house is weathertight.
Must be complete first:
- Roof complete and weathertight
- Windows and doors installed
- Framing complete and inspected
Can happen in parallel:
- Plumbing rough-in
- HVAC rough-in
What comes after:
- Rough-in inspection (all trades)
- Insulation
- Drywall
Should You DIY This Phase?
DIY If:
- Comfortable learning NEC and IRC requirements
- Can plan circuits and loads properly
- Have time to study code (IRC E3900 series)
- Willing to work methodically and safely
- Local code allows owner-builder electrical work
- Can handle physical work (drilling, pulling wire)
Hire Out If:
- Uncomfortable with electrical concepts
- Complex smart home or automation
- Can't dedicate time to learning code
- Want licensed electrician liability protection
- Local code requires licensed electrician
Electrical rough-in is very DIY-able with proper planning. The code seems complex but follows logical safety patterns. Buy a code book, watch training videos, and work methodically. Most owner-builders who fail electrical inspection do so from carelessness, not lack of ability.
Materials Needed
Service and Panels (200-amp service)
| Item | Quantity | Typical Cost | Notes |
|---|---|---|---|
| 200-amp main panel | 1 | $200-$400 | 40-circuit minimum |
| Subpanel (if needed) | 1 | $150-$300 | Garage, workshop |
| Main breaker | 1 | Included | 200-amp |
| Circuit breakers | 30-40 | $300-$600 | 15A, 20A, GFCI, AFCI |
| Meter base | 1 | Included in service | Power company installs |
Wiring (2,000 sq ft home)
| Item | Quantity | Typical Cost | Notes |
|---|---|---|---|
| 14/2 Romex (NM-B) | 1,000 ft | $200-$350 | 15-amp lighting circuits |
| 12/2 Romex (NM-B) | 2,500 ft | $750-$1,250 | 20-amp receptacle circuits |
| 12/3 Romex (NM-B) | 200 ft | $150-$250 | 3-way switches, range |
| 10/3 Romex (NM-B) | 50 ft | $100-$175 | Electric dryer (30A) |
| 6/3 Romex (NM-B) | 50 ft | $150-$250 | Electric range (50A) |
Boxes and Devices
| Item | Quantity | Typical Cost | Notes |
|---|---|---|---|
| Plastic work boxes (single) | 60-80 | $120-$200 | Switches, receptacles |
| Plastic work boxes (double) | 15-20 | $60-$100 | Multi-gang |
| Ceiling boxes | 20-30 | $80-$150 | Lights, fans |
| Junction boxes | 10-15 | $40-$75 | Wire joins |
| Receptacles (standard) | 50-60 | $150-$240 | 15 or 20-amp |
| GFCI receptacles | 6-8 | $120-$200 | Required locations |
| Switches (single) | 25-30 | $75-$150 | Standard |
| 3-way switches | 8-12 | $40-$90 | Stairs, hallways |
| Dimmer switches | 6-10 | $120-$250 | Dining, bedrooms |
Tools Required
Essential:
- Wire strippers
- Lineman's pliers
- Screwdrivers (flat and Phillips)
- Voltage tester (non-contact)
- Tape measure
- Drill with hole saw bits (3/4", 1", 1-1/4")
- Cable stapler or hammer
- Utility knife
- Flashlight/headlamp
Nice to have:
- Wire pulling fish tape
- Cable ripper
- Reciprocating saw
- Stud finder
- Label maker
Code-required for testing:
- Multimeter
- GFCI tester
- Circuit tracer
Step-by-Step Process
Days 1-2: Planning and Load Calculation
Load calculation (determines panel size):
- Calculate total square footage (VA = sq ft × 3)
- Add appliance loads (range, dryer, HVAC, water heater)
- Add required circuits (kitchen, laundry, bathroom)
- Size panel: 2,000 sq ft home typically needs 150-200 amp service
Circuit planning:
| Circuit | Amperage | How many / sizing | Notes |
|---|---|---|---|
| General lighting | 15A | Maximum 8-12 fixtures each | — |
| Receptacles | 20A | One per room minimum (bedrooms), two in kitchen | — |
| Kitchen countertop | 20A | Two circuits | GFCI required |
| Bathroom | 20A | One circuit per bathroom | GFCI required |
| Laundry | 20A | One circuit | GFCI required under the 2020+ NEC; verify your adopted edition and local rules |
| Garage | 20A | One circuit minimum | GFCI required |
| Dedicated circuits | Range 40-50A, dryer 30A | Range, dryer, HVAC, water heater, dishwasher, disposal | Sized per appliance |
Always install more circuits than minimum code requires. Adding circuits during rough-in costs $30. Adding them later costs $500-$1,000.
Create circuit schedule:
- List every circuit with description
- Note wire size and breaker amperage
- Identify GFCI and AFCI requirements
- Mark which circuits go to which rooms
Days 3-5: Box Installation
Box placement heights:
For general receptacles the code rarely dictates an exact height — pick consistent heights and check local amendments. For accessibility (ADA), receptacles generally must be at least 15" above the floor and switches no higher than 48" — verify your adopted NEC edition and local rules.
| Device | Typical height above floor | Notes |
|---|---|---|
| Wall receptacles | 12-18" (often 16") | Common convention |
| Kitchen counter | 44" (about 4" above counter) | Code limits counter receptacles to no more than 20" above the countertop (NEC 210.52(C)) |
| Bathroom | 44" | Typical |
| Switches | 48" | Common convention |
Required receptacle locations (NEC 210.52(A)—verify your adopted edition and local rules):
- Every wall space 2 feet or wider gets a receptacle
- The controlling "6-foot rule": no point along a wall floor line may be more than 6 feet from a receptacle (so receptacles end up no more than 12 feet apart on an unbroken wall)
- Within 6 feet of doorways
- Both sides of fireplaces
- All countertop spaces over 12" wide
Box installation:
- Mark all box locations on studs
- Install boxes at consistent heights (use laser level)
- Boxes must be flush with finish drywall (account for drywall thickness)
- Secure boxes firmly to studs (nails or screws)
- Leave 6-8" of wire extending from box
Ceiling box installation:
- Install between joists with adjustable bar
- Mark fan-rated boxes (required for ceiling fans)
- Install at correct drop for finish ceiling
- Consider heavy fixture bracing
Days 6-10: Running Wire
General wiring practices:
- Run wire before installing insulation
- Drill holes in center of studs (minimum 1-1/4" from edge)
- Use nail plates where wire is within 1-1/4" of edge
- Support wire every 4-1/2 feet and within 12" of boxes
- Don't kink or damage wire jacket
- Leave 6-8" extra wire at each box
Running technique:
- Start at panel, run to first box
- Continue to next box on same circuit
- Staple within 12" of boxes and every 4-1/2 feet
- Label wires at panel (circuit number or location)
- Use cable clamps at all box entries
Specific circuit wiring (match wire gauge to breaker):
| Circuit | Wire | Breaker | Notes |
|---|---|---|---|
| Lighting circuits | 14/2 (14/3 for 3-way switches) | 15A | Wire lights and switches on same circuit; maximum 8-12 lights per circuit |
| Receptacle circuits | 12/2 | 20A | Separate circuit per room (bedrooms); wire receptacles in sequence (don't home-run each one) |
| Kitchen small appliance | 12/2 | 20A | Kitchen requires two small appliance circuits |
| Bathroom | 12/2 | 20A | Dedicated circuit required |
| Electric range (240V) | 6/3 or 8/3 | 40-50A | — |
| Electric dryer (240V) | 10/3 | 30A | — |
| HVAC (240V) | Size per unit specifications | Per unit | — |
| Water heater (240V) | 10/2 | 30A | Typical |
All splices must be in accessible junction boxes. This is a critical code requirement and safety issue.
Days 11-12: Special Circuits
GFCI requirements (ground fault protection):
- All kitchen countertop receptacles
- All bathroom receptacles
- All garage receptacles
- All outdoor receptacles
- All crawl space receptacles
- All unfinished basement receptacles
- Laundry areas (required under the 2020+ NEC)
AFCI requirements (arc fault protection):
- All bedroom receptacles and lights
- Family rooms, dining rooms (varies by code year)
- Living rooms (varies by code year)
- Kitchens and laundry areas (added under the 2020+ NEC)
- Check NEC 210.12 / IRC E3902.16 for your code year
AFCI requirements have expanded over recent code cycles. Check your specific code year and adopted NEC edition. Many jurisdictions now require AFCI on nearly all 120V 15- and 20-amp circuits except bathrooms, garages, and unfinished basements. Note that kitchens and laundry areas now require AFCI under the 2020+ NEC (NEC 210.12)—verify your adopted edition and local rules.
Smoke detector wiring:
- Hardwired with battery backup
- Interconnected (one sounds, all sound)
- One in each bedroom
- One outside each sleeping area
- One per floor minimum
- Use 14/3 wire for interconnection
Outdoor circuits:
- GFCI protected (required)
- Use weatherproof boxes and covers
- Seal all penetrations through walls
- Install in-use covers if receptacles used while covered
Days 13-14: Panel and Final Connections
Panel installation:
- Mount panel at accessible location (code requires 30" clearance in front)
- Run main feed from meter to panel (power company usually does this)
- Install ground rod (two required, 6 feet apart minimum)
- Run ground wire from panel to ground rods (copper #6 minimum)
- Bond ground and neutral bus in main panel only
Circuit connections at panel:
- Leave the cable sheath (outer jacket) extending at least 1/4" inside the enclosure past the clamp—strip the jacket only after it's inside the box, not before (NEC 312.5(C)—verify your adopted edition and local rules)
- Secure cable to panel with proper clamps
- Connect ground to ground bus
- Connect neutral to neutral bus
- Connect hot wire(s) to breaker
- Install breaker in panel
- Label breaker clearly (by room and purpose)
Labeling:
- Label every circuit at panel (specific descriptions: "Master BR Receptacles", not "BR")
- Label inside each box (circuit number)
- Label special circuits (GFCI, AFCI)
- Create panel schedule on inside of panel door
Day 15: Testing and Inspection Prep
Pre-inspection testing:
- Verify all boxes securely mounted
- Verify all cables properly stapled
- Verify nail plates installed where required
- Check for damaged wire insulation
- Verify proper wire sizes for circuits
- Check that all cables labeled at panel
- Verify GFCI and AFCI circuits correct
Testing after power on (typically after inspection):
- Test all circuits with multimeter (correct voltage)
- Test all GFCI outlets (test button)
- Test all AFCI breakers (test button)
- Verify correct hot/neutral/ground at all receptacles
Code Requirements
Key IRC and NEC electrical requirements are below. Code numbers and thresholds change between editions — always verify your adopted NEC/IRC edition and local rules before relying on any of these.
| Code reference | Requirement | Detail |
|---|---|---|
| IRC E3703.1 / NEC 210.52(A) | Receptacle spacing | No point along a wall floor line may be more than 6 feet from a receptacle (the "6-foot rule"), which places receptacles no more than 12 feet apart on an unbroken wall; every wall space 2 feet or wider gets one |
| IRC E3901.6 | GFCI protection | Required in kitchens, bathrooms, garages, outdoors, crawlspaces, unfinished basements, and laundry areas (laundry added under the 2020+ NEC) |
| IRC E3902.16 / NEC 210.12 | AFCI protection | Required in bedrooms and other habitable rooms; kitchens and laundry areas added under the 2020+ NEC — check your code year |
| IRC E3906.12 | Smoke alarms | Hardwired, interconnected, one per bedroom, one per floor, one outside sleeping areas |
| NEC 334.30 | Cable support | Within 12" of boxes, every 4-1/2 feet along run |
| NEC 300.4 | Protection from damage | Nail plates required within 1-1/4" of framing edge |
| NEC 314.17 | Box installation | Boxes must be flush with finished wall surface |
| NEC 210.52 | Receptacle outlets required | Specific spacing and location requirements by room type |
Subcontractor Considerations
If hiring electricians:
Typical pricing:
| Work | Typical cost | Basis |
|---|---|---|
| Complete rough-in | $3,500-$7,000 | For 2,000 sq ft |
| Per outlet/switch | $75-$150 | Installed |
| Per circuit | $150-$300 | From panel to first device |
| Panel upgrade | $1,200-$2,500 | For 200-amp service |
Timeline: 3-7 days for complete rough-in
What to look for:
- Licensed electrician (required in most jurisdictions)
- Experience with residential new construction
- Will handle permit and inspection
- Provides warranty on work
- Carries proper insurance
Common Mistakes
Nearly every mistake below is both a code violation and a safety hazard, and the cost to fix climbs once walls are closed. Catch them during rough-in.
1. Wrong Wire Size for Circuit
Why it's a problem: Fire hazard, code violation, failed inspection. How to avoid: 14-gauge for 15A circuits, 12-gauge for 20A circuits, larger for 240V. Never downsize. Cost if you don't: $2,000-$5,000 to rewire circuits.
2. Missing GFCI or AFCI Protection
Why it's a problem: Safety hazard, code violation, fails inspection. How to avoid: Study current code requirements. When in doubt, add protection. Cost if you don't: $200-$500 per location to retrofit.
3. Improper Box Fill
Why it's a problem: Code violation, fire hazard, fails inspection. How to avoid: Follow box fill calculations (NEC 314.16). Generally limit to 6-8 wires per single box. Cost if you don't: Replace with larger boxes, rewire.
4. No Nail Plates
Why it's a problem: Drywall screws puncture wires, causing shorts and fires. How to avoid: Install nail plates wherever wire passes within 1-1/4" of framing edge. Cost if you don't: Potential fire, expensive repairs.
5. Inadequate Support
Why it's a problem: Sagging cables, code violation, fails inspection. How to avoid: Staple within 12" of boxes and every 4-1/2 feet along run. Cost if you don't: Failed inspection, must expose and add staples.
6. Wrong Box Depth
Why it's a problem: Boxes stick out past drywall or sink too deep. Devices don't mount properly. How to avoid: Account for 1/2" or 5/8" drywall thickness when setting boxes. Cost if you don't: $50-$150 per box to reset or add box extenders.
7. Insufficient Circuits
Why it's a problem: Tripped breakers, can't use multiple appliances, safety issues. How to avoid: Install more circuits than minimum. Each bedroom should have dedicated circuit. Cost if you don't: $500-$1,500 per circuit to add later.
8. Poor Panel Organization
Why it's a problem: Difficult troubleshooting, unsafe, code violations. How to avoid: Label everything clearly. Organize circuits logically. Leave room for future circuits. Cost if you don't: Confusion, safety issues during troubleshooting.
9. Splicing in Walls
Why it's a problem: Fire hazard, code violation, failed inspection. How to avoid: All splices must be in accessible junction boxes. Plan wire runs to avoid splices. Cost if you don't: Cut walls to install boxes, repair walls.
10. Missing Smoke Detector Interconnection
Why it's a problem: Code violation, safety issue, fails inspection. How to avoid: Run 14/3 between all smoke detectors. Interconnect per manufacturer instructions. Cost if you don't: $500-$1,500 to fish wires after drywall.
Quality Checkpoints
Before rough-in inspection, verify:
Budget Breakdown
Example for 2,000 sq ft home:
| Item | Cost | Notes |
|---|---|---|
| **Main Service** | ||
| 200-amp panel | $200-$400 | 40-circuit minimum |
| Main breaker | Included | 200-amp |
| Circuit breakers | $300-$600 | Mixed 15A, 20A, GFCI, AFCI |
| Meter base | $150-$250 | If not included in service |
| Ground rods and wire | $80-$150 | Code required |
| **Wire and Cable** | ||
| 14/2 Romex | $200-$350 | Lighting circuits |
| 12/2 Romex | $750-$1,250 | Receptacle circuits |
| 12/3 Romex | $150-$250 | 3-way switches, special |
| 10/2 and 10/3 | $100-$175 | 30A circuits |
| 6/3 or 8/3 | $150-$250 | Range, large appliances |
| **Boxes and Devices** | ||
| Work boxes | $180-$300 | All types |
| Ceiling boxes | $80-$150 | Lights and fans |
| Junction boxes | $40-$75 | Wire splices |
| Receptacles | $270-$440 | Regular and GFCI |
| Switches | $235-$490 | Regular, 3-way, dimmers |
| **Hardware** | ||
| Staples | $30-$60 | Cable support |
| Nail plates | $40-$80 | Wire protection |
| Wire nuts | $20-$40 | Connections |
| Labels | $15-$30 | Panel labeling |
| **Labor (if hiring)** | $3,500-$7,000 | Complete rough-in |
| **Total (DIY)** | **$3,095-$5,490** | Materials only |
| **Total (Hired)** | **$6,095-$11,990** | Materials + labor |
Wiring the home yourself saves $4,000-$8,000 in labor versus the $3,500-$7,000 a hired electrician charges for a complete rough-in. The trade-off is your time to study code and work methodically.
Timeline Tips
Scheduling:
- Can work simultaneously with plumbing and HVAC
- Schedule combined rough-in inspection for all trades
- Allow time for learning if first time
What Comes Next
After electrical rough-in inspection passes:
- Complete all rough-in trades
- Combined rough-in inspection
- Insulation installation
- Drywall installation
Link to: HVAC Installation Phase
Related Resources
Need Electrical Help?
Electrical work requires code knowledge but is very DIY-able. If you're unsure about load calculations or circuit requirements, a consultation ensures safety and code compliance.