Section 26.05.33 covers the raceway and box systems that make electrical distribution physically workable in the field: conduits and fittings, wireways, surface raceways, boxes, enclosures, cabinets, and exterior underground handholes.
The quality challenge is not just whether each component is listed and labeled, but whether the complete routing system is installed for the actual environment, supported correctly, coordinated with finishes and penetrations, and left accessible and ready for conductor installation.
The FTQ360 checklist follows the same three-phase control flow used across disciplined QAQC programs, Preparatory, Initial, and Follow-Up, so the team can confirm the right raceway type before rough-in, approve first-article installations before concealment or backfill, and keep routing, box fill, bonding, and penetration work within limits until closeout.
What the Checklist Covers
This checklist tracks the work from preinstallation planning through final acceptance. It starts with approved submittals for conduit types, fittings, wireways, floor boxes, cabinets, enclosures, handholes, and custom assemblies, then moves into practical field controls such as raceway application by area, box sizing, conduit-fill calculations, penetration planning, support strategy, and underground work sequencing.
During installation, the checklist follows first-article conduit runs, box terminations, wet-location enclosures, floor boxes, and underground segments so the contractor proves the approach before the work disappears behind walls, ceilings, slabs, or backfill.
As the job progresses, the checklist keeps attention on support spacing, bond continuity, reamed terminations, firestop and sleeve-seal hold points, burial depth, handhole elevation, weatherproof integrity, accessibility, and final closeout verification.
The result is not just a punch list of components, but a documented field record showing that raceways and boxes were selected, installed, protected, and accepted for the conditions they actually serve.
Checklist Preview
This section tends to fail in ways that look small during rough-in but become expensive after walls close and conductors are pulled. The first recurring problem is the wrong raceway or fitting showing up in the wrong environment.
That can mean EMT drifting into areas that need heavier protection, mismatched fittings in wet locations, or substituted materials that undermine corrosion resistance, grounding continuity, or physical protection. The preventive control is simple but discipline-heavy: review the raceway application matrix by area before release, then verify the first installed segments against the specified environment and exposure condition.
Another common failure is routing that exceeds bend limits or relies on undersized pull boxes after field changes. The installation may look acceptable until conductors are pulled and insulation damage or pulling difficulty exposes the problem.
Box overfill is just as common, especially when additional conductors, devices, or fittings are added in the field without recalculating volume. The checklist addresses both issues by requiring representative box-fill and pull-box sizing calculations early, then revisiting those calculations whenever routing changes.
Moisture and life-safety failures also show up repeatedly. Unsealed underground entries allow moisture migration into interior raceways. Improper sleeve, firestop, or listed-system selection at rated penetrations turns a routine rough-in detail into a failed inspection and rework event.
Metallic raceways can also lose their effectiveness as a fault path when locknuts are loose, bushings are omitted, or bonding details are skipped at the locations that need them most.
Those are exactly the kinds of defects that are easiest to catch before concealment and most disruptive to repair afterward, which is why this checklist ties them to explicit hold points and stop-work triggers.
This phase takes place before rough-in begins and focuses on making sure the field team is working from an approved, coordinated plan rather than solving raceway problems in place.
Start by verifying that approved submittals for conduit types, fittings, wireways, floor boxes, cabinets, handholes, and enclosures are on site, together with manufacturer installation instructions and the material details needed for the actual areas of use.
From there, the critical planning activity is the area-by-area raceway application review. Exposed, concealed, damp, wet, underground, and severe-physical-damage locations should already be mapped to the specified raceway type and enclosure rating before material is released to the field.
This is also the point where the box sizing and conduit-fill strategy needs to be documented, not guessed. Representative box-volume calculations under NEC 314.16 and pull-box sizing checks under NEC 314.28 should be completed before the crew starts rough-in.
The same is true for support layouts, penetration planning, and underground work sequencing. Rated wall and floor crossings need sleeve and firestop hold points assigned in advance. Handhole and direct-bury work need a defined plan for bedding, burial-depth checks, warning tape or warning planks, compaction sequence, and stub-up protection.
Surface raceways and floor boxes should already be coordinated with ceiling layouts, wall finishes, equipment locations, and slab conditions so the field team is not trying to retrofit alignment later.
Support planning should also confirm that raceways will be supported per project requirements and kept within the required distance of enclosures and changes in direction where applicable.
The Initial Phase confirms that the first installations prove the method before the work is concealed or extended across the project.
The first conduit runs should demonstrate the specified material and trade size for the actual environment, with no unapproved substitutions. They should also demonstrate compliant routing: bend counts within allowable limits, bend radii that protect conductors during pull, and support locations that reflect the project requirements.
The first box installations should verify more than appearance. They need to confirm box volume, conduit entry method, reamed terminations, bushings, flush finish condition, and the practical buildability of the selected arrangement.
Wet-location and exterior assemblies deserve special attention during first-article review because this is where listing, gasket condition, threaded hubs, and enclosure rating matter most. The first underground segments should confirm measured burial depth, stub-up protection, seals and caps at open ends, and the sequence of inspection before backfill.
The same logic applies to the first handholes and floor boxes. Handholes need to show proper bedding, plumb and level installation, correct conduit-entry provisions, and finished elevation that matches whether the area is paved or unpaved.
Floor boxes need to be level, flush, and coordinated with the finished floor build-up rather than treated as rough slab placeholders. No concealment or backfill should proceed until these first-article approvals are documented.
Follow-Up Phase
Once the work is underway, the Follow-Up Phase keeps the installation consistent across all areas and crews. This is where ongoing inspections verify that raceway type, fitting compatibility, and enclosure rating remain correct as the work moves through different rooms and conditions.
Support inspections should confirm both spacing and method, including the requirement that raceways are supported from the building structure and not by boxes. Routing checks should keep conductor fill within allowable limits, confirm that box fill remains compliant, and catch field changes that would require added pull points or larger boxes.
Termination details matter here as well. Conduit ends should be reamed, locknuts and bushings should be tight, and metallic raceway continuity should be maintained wherever bonding is required.
Penetrations through rated walls and floors should remain hard hold points until sleeves, sleeve seals, and firestop systems are matched to the listed assembly and documented before concealment. Underground inspections should continue to verify burial depth, bedding, warning tape or planks, moisture seals, spare-raceway caps, and backfill sequence.
Handholes and pull boxes should be checked for level, conduit-entry sealing, hardware installation, and cover elevation relative to finished grade.
This phase is also where stop-work discipline pays off. Repeated box-fill overages, unsupported raceways, missing firestop, open underground entries, and inaccessible concealed boxes are not small administrative misses. They are signals that the installation pattern has drifted and needs correction before it spreads.
Completion — Final Acceptance & Closeout
At closeout, the focus shifts from rough-in compliance to usable, maintainable, code-compliant finished work. Accessible boxes must remain accessible, and cover plates should be flush with the finished surface.
Surface-mounted raceways and boxes should be plumb, level, tight to the substrate, and free from visible gaps that indicate poor fit or rushed installation. Metallic raceways and required bonding points should pass continuity checks, with meter readings documented as part of the final record. Final spot checks should also verify that later field changes did not create new box-fill or pull-box sizing violations.
Exterior and wet-location assemblies should not be accepted on appearance alone. Listing labels, gaskets, covers, threaded hubs, tamper-resistant locks where required, and weather seals all need to be documented. Underground closeout should include burial-depth records, warning tape or plank confirmation, stub-up protection, and identification of spare raceways.
Floor boxes should be accepted only after flush trim fit, level condition, and proper device or cover alignment with finished flooring are documented.
Handholes and pull boxes should close with verified elevation, cover finish, cover legend, entry sealing, and any required SCTE 77 certification records.
If raceway continuity, fill compliance, accessibility, enclosure rating, or penetration sealing remains open, conductor pull and energization should stay on hold until those deficiencies are resolved
References and Other Specification Systems
NFPA 70 (current adopted edition, including Articles and Tables 250, 300.5, 300.11, 314.16, 314.28, 344.24, and 358.24 )
and ISO 9000 and ISO 10012 for calibration traceability where specified.
Other Specification Systems
UFGS 26 05 33 Raceways and Boxes for Electrical Systems
VA 26 05 33 Raceways and Boxes for Electrical Systems
NMS 26 05 33 equivalent to be verified
RIB SpecLink 26 05 33 equivalent to be verified
Related sections include 26 05 19 Low-Voltage Electrical Power Conductors and Cables, 26 05 29 Hangers and Supports for Electrical Systems, 26 05 44 Sleeves and Sleeve Seals for Electrical Raceways and Cabling, and 26 05 53 Identification for Electrical Systems.
FTQ360 gives project teams a structured way to manage this scope as a documented quality process instead of a series of isolated rough-in observations.
Inspectors can record field checks by area, attach photos and measurements, document deficiencies, and keep hold points visible through each phase of the work.
That is especially valuable on raceway and box installations because many of the highest-risk defects become hidden once finishes, slabs, or backfill are complete.
A disciplined digital record helps the team catch patterns early, assign corrective action clearly, and preserve the evidence needed for acceptance and future troubleshooting.
Prefer the FTQ360 in-app setup?
Use the template as the starting point for a project-specific checklist, then tailor the checkpoints to your contract documents, designated hold points, and closeout requirements.
Add any owner-specific acceptance criteria, area tags, photo requirements, testing records, and deficiency workflows before field use.
The goal is not to create more paperwork.
It is to make sure the right verifications happen at the right time, especially before concealment, backfill, conductor pull, and energization.
For implementation help, visit support.ftq360.com.
MasterSpec® and MasterFormat® are registered trademarks. This blog references section numbers and titles for clarity only and does not reproduce proprietary content. Copyright FTQ360.