Introduction

Whether you're prepping for a rough-in or a final inspection, the key to success is preparation, precision, and a thorough understanding of the code. Inspectors are looking for safety, code compliance, and professional workmanship. By adopting a "play-the-inspector" mindset before the actual visit, you can catch the common violations that lead to costly red tags and delays.

Here is a consolidated guide, pulled from industry best practices, to help you ensure you pass when an inspector comes to see your electrical work.

Pre-Inspection Preparation: The Pro Walk through

Before the Inspector or Authority Having Jurisdiction (AHJ) arrives, you and your crew should conduct a detailed internal inspection.

  1. Know Your AHJ: Try to establish communication with your local inspector beforehand. While the National Electrical Code (NEC) is the baseline, local jurisdictions often have unique amendments or interpretations. A quick chat can clarify any specific regional requirements and prevent avoidable failures.

  2. Clean and Clear the Space: A tidy, professional job site reflects quality workmanship. Clear away debris and ensure the inspector has easy, safe access to all electrical components, from the service panel to the farthest outlet box.

  3. Documentation is King: Have a copy of the current, approved electrical plans and the National Electrical Code (NEC) on site. This shows professionalism and allows for quick, on-the-spot resolution of any code disputes.

  4. Confirm the Basics: Verify that your permit and inspection card are clearly visible on the job site.

Rough-In Checklist: Before the Walls Close Up

The rough-in is arguably the most critical inspection, as the wiring must be unconcealed and fully visible.

Common Rough-In Requirement

How to Pass

NEC/Safety Focus

Wiring Protection

All cables must be secured with staples at the required intervals and within a certain distance of every box. Use protection plates (nail plates) where cables pass through framing members closer than 1.25 inches from the edge.
  • Prevents damage from drywall screws and nails.

Box and Wire Length

Ensure you have 6 to 8 inches of usable wire coming out of every box, and the cable sheathing extends at least 0.25 inches past the cable clamp (per box requirements).
  • Allows for safe device installation and prevents conductor insulation damage.

Splicing/Termination

Tie all grounding wires together and pigtail them out for bonding to the box and device. All exposed conductors (hot and neutral) must be covered with wire nuts—even if they won't have a device attached yet. Do not install any switches, outlets, or devices during the rough-in.
  • Protects against accidental contact and ensures proper grounding continuity.

Fire Blocking

All holes or penetrations passing from one floor to another, or into concealed spaces, must be sealed using approved fire-rated caulk or fire block foam.
  • Prevents fire and smoke spread (chimney effect).

Dedicated Circuits

Verify that dedicated circuits for appliances (dishwasher, disposal, laundry, etc.) are correctly routed and sized according to code.
  • Prevents overloaded circuits, a leading cause of electrical fires.

Final Inspection Checklist: Ready for Power

The final inspection verifies that all devices, fixtures, and panels are correctly and safely installed.

Final Inspection Requirement

How to Pass

NEC/Safety Focus

GFCI and AFCI Protection

Test all GFCI receptacles (bathrooms, kitchens, garages, outdoors) and AFCI breakers (bedrooms, living areas) to ensure they trip correctly.
  • Essential shock and fire prevention devices. Faulty or missing protection is a guaranteed fail.

Service Panel Integrity

Ensure the main panel is neat, clearly labeled, and not overcrowded. Fill all unused openings in the panel and all electrical boxes with blank metal inserts or proper covers.
  • Prevents foreign objects from entering the panel and contains electrical faults.

Device Installation

Ensure all switches and outlets are securely fastened and flush with the finished wall surface. Check that tamper-resistant (TR) outlets are used where required.
  • Ensures devices are safe, won't pull out of the wall, and meet modern child-safety standards.

Lighting Fixtures

Confirm that recessed lights are IC-rated if they will be in direct contact with insulation. Ensure all ceiling fans and heavy light fixtures are mounted to approved boxes (not just secured to framing).
  • Prevents overheating and fire hazards in insulated ceilings.

Grounding and Bonding

Verify that the electrical system's grounding electrode system (grounding rods, water pipe connections) is fully intact and correctly bonded at the service equipment.
  • Critical for safely dispersing fault current and protecting against surge damage.

Final Details

Ensure all junction boxes and wire splices are covered with proper cover plates. Mislabeled breakers can also cause a failure, so double-check the accuracy of your panel schedule.
  • Reflects professionalism and prevents dangerous exposed wiring.

Remember, if your work fails, the inspector is trying to keep you, your client, and the property safe. Don't argue; be prepared to make quick adjustments if minor issues are noted. Having a designated crew member (or your copy of the NEC) ready to address corrections can often turn a "red tag" into a "pass" on the spot. Pass your next inspection by setting the bar high from the very start!


*Disclaimer* This article is developed to help with basic guidelines on passing your electrical inspection for more in depth information on how to pass your scheduled inspection please refer to the NFPA website (NEC) : National Electrical Code®