Section 26.27.26 covers wiring devices and the related installation, integration, and testing work needed to put receptacles, switches, sensors, wall plates, and associated device assemblies into reliable service.
The checklist is built around the three-phase QAQC control flow: Preparatory, Initial, and Follow-Up, so you can verify readiness before trim-out, confirm the first acceptable installation, and then keep production within limits as areas progress.
Because wiring devices sit at the point where users interact with the electrical system, the quality risks are not just visual, they directly affect safety, labeling accuracy, troubleshooting, and final turnover.
The FTQ360 version includes required photos, numeric measurements, and sign-offs so each tested outlet, labeled plate, and corrected deficiency is documented in an auditable field record.
What the Checklist Covers
Wiring Devices starts with the basics you need to control before trim-out begins: approved product data, device schedules, wall-plate legends, box-fill review, and branch-circuit coordination for shared neutrals, split circuits, isolated grounds, GFCI/AFCI protection, hospital-grade devices, SPD receptacles, and sensor-controlled locations.
From there, the checklist follows the work through first installation, where you verify the correct device type, NEMA configuration, torque, polarity, grounding, height, orientation, and weather-resistant cover details before the area becomes the benchmark for production.
As work continues, it tracks box cleanliness, conductor preparation, ongoing testing, labeling, replacement of temporary-use devices, and final acceptance records so you can tie every installed device back to a documented QAQC path from preconstruction through turnover.
Checklist Preview
This spec section has recurring field issues. The section has a history of commonly encountered issues around polarity, grounding, trim-out discipline, wet-location protection, and device identification because small installation errors at the device level often stay hidden until testing or owner use exposes them.
Reversed polarity or open grounds usually trace back to incorrect terminations or omitted bonding and can create shock hazards, nuisance equipment behavior, and failed inspections. Untorqued terminals from rushed trim-out can lead to overheating, arcing, and premature device failure.
Contaminated or undersized boxes make terminations difficult, damage insulation, and create code problems that should have been caught before device installation.
Exterior or damp-location devices often fail when the wrong while-in-use cover is installed or the cover does not close over the cord. Split-circuit and multiwire branch-circuit errors can introduce shared-neutral hazards if tabs, ties, and breaker coordination are not verified.
Incomplete plate labeling and mixed device types or colors also create avoidable confusion at turnover.
These priorities drive the QAQC details that follow.
This phase takes place in the weeks before work begins.
Prepare for success by verifying that personnel, materials, equipment, and documentation are ready for work to begin.
Before trim-out starts, confirm that approved product data, the device schedule, premarked wall-plate legends, and manufacturer installation instructions are on site and aligned with the approved design. Use a device matrix to verify each location has the correct type, voltage, amperage, NEMA configuration, special function, and color before materials are released to the field.
Review box fill, especially where conductor counts approach the higher-fill conditions flagged in the checkpoint library, and cross-check branch-circuit requirements for shared neutrals, split circuits, isolated-ground devices, hospital-grade devices, GFCI/AFCI protection, SPD receptacles, and occupancy sensors.
You also need a wall-finish coordination plan to keep outlet boxes free of plaster, mortar, joint compound, paint, and other contamination.
Finally, establish the testing plan, including a digital wiring analyzer, polarity tester, torque screwdriver, GFCI tester, ground-impedance tester, and retention-force gauge where healthcare devices apply, and set stop-work triggers for missing schedules, unverified box fill, incorrect protection, or unapproved substitutions.
This phase confirms that work starts correctly.
Your first accepted installation becomes the benchmark for the rest of the trim-out work, so this phase focuses on proving that the approved approach works in the field before production accelerates. Verify that the first receptacle or device sample matches the approved type, NEMA configuration, color, and system designation and that it is installed only after wall preparation and painting are complete.
Confirm that the first terminations use pigtails not less than 6 inches long, correct polarity, and manufacturer-recommended torque applied with a calibrated screwdriver. Check the first metal-box installation for proper bonding, removal of fiber washers where metal-to-metal contact is required, and verified grounding continuity.
Test the first required GFCI or AFCI device with both integral and external testers, confirm weather-resistant devices have the proper listed cover arrangement, verify wall-plate identification, and measure device height and orientation before releasing additional areas for production.
Follow-Up Phase
This phase aims to keep work proceeding correctly.
Once production is underway, use recurring inspections to keep trim-out consistent and catch deviations before cover plates go on and deficiencies spread across multiple rooms. Verify that devices stay protected until connection time and that temporary-use devices installed before finishes are replaced with new ones before acceptance.
Check that insulation is stripped only immediately before termination, boxes remain clean and undamaged, side wiring is used where available, unused terminal screws are tightened, and No. 12 AWG pigtails are used when larger conductors serve 15- or 20-amp devices.
Continue cross-checking multiwire branch circuits, split-circuit receptacles, and approved device types in sampled areas. In-process testing should keep receptacle voltage within 105 to 132 V, ground impedance at not more than 2 ohms, and voltage drop under a 15-amp load below 6 percent.
Stop work in any area with reversed polarity, failed GFCI testing, missing bonds, incorrect device types, or contaminated boxes.
Completion — Final Acceptance & Closeout
All of the work culminates with a final result; this phase ensures the completed installation meets project requirements.
At closeout, the focus shifts from installation control to documented proof that the finished devices are safe, correctly identified, and ready for turnover.
Final testing confirms that receptacle line voltage remains within 105 to 132 V at tested outlets and that voltage drop under a 15-amp load is less than 6 percent. Ground impedance at tested receptacles must not exceed 2 ohms, and grounding continuity from the device yoke back to the grounding system needs to be verified end to end.
You also need confirmation that hot, neutral, and equipment-ground conductors are landed on the correct terminals and that polarity testing shows proper wiring at each tested sample. Required GFCI devices must trip and reset properly, with failed units replaced and retested.
Where healthcare devices apply, hospital-grade receptacles in patient-care areas must meet the required grounding blade retention force.
Finish the closeout by verifying flush wall plates, complete machine-printed panel and circuit labels, final field-quality reports, torque logs, O&M data, test records, and any specified extra materials before energization or turnover is released.
References and Other Specification Systems
NFPA 99 (current adopted edition where healthcare devices apply)
Other Specification Systems
UFGS 26 24 16 Panelboards; VA 26 24 16 Panelboards; NMS 26 24 16 equivalent to be verified; RIB SpecLink 26 24 16 equivalent to be verified; related inherited controls from 26.05.26, 26.05.29, 26.05.33, and 26.05.73 where panelboards interface with grounding, supports, raceways, and power system studies.
FTQ360 runs on tablets and phones (online or offline), so inspectors capture photos and measurements anywhere and sync later.
Required fields and conditional logic prevent skips and enforce holds. Time/user stamps and lot/location links keep the record auditable.
Dashboards surface patterns early, so you can correct wiring-device issues before they repeat across additional rooms, circuits, or phases of trim-out.
Prefer the FTQ360 in-app setup?
Open Checklist Setup → Library, search for the code and tap to clone the checklist. Then tailor checkpoint template to your requirements.
If your team still needs paper in select areas, you can print the PDF from the FTQ360 app, mark it up in the field, then transcribe results and attach photos later—just note that paper won’t enforce required fields, conditional logic, or holds like the app does.
For implementation help, visit support.ftq360.com.
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