Electrical Inspection Checklist Calculator

An electrical inspection checklist calculator converts entered inspection observations into a clear status summary: Total items, Passed items, Failed items, Not applicable items, Completion, and Required failures.

The result is useful during internal quality-control walks, pre-inspection punch-list review, commissioning documentation review, and contractor closeout coordination. It helps organize whether checklist items such as panel labeling, grounding and bonding, conductor terminations, raceway support, equipment access, working clearances, branch-circuit identification, or test documentation have been reviewed and whether any required items remain unresolved.

The calculator does not determine conductor ampacity, raceway fill, voltage drop, available fault current, overcurrent protective-device sizing, or code compliance. Those engineering and installation decisions require the applicable design documents, manufacturer instructions, field verification, adopted code requirements, and the authority having jurisdiction (AHJ).

Inspection Rows and Status

Each Inspection row records one checklist item and its current review state.

Field	Electrical use
Item	Identifies the installation feature, document, or verification point being reviewed
Status	Records whether the item is Pass, Fail, or not applicable
Required item	Identifies whether an item is mandatory for the inspection or internal release decision

Typical entries may include:

• “Feeder conductors identified at distribution panel”
• “Equipment grounding conductor terminated”
• “Panelboard directory complete and legible”
• “Branch-circuit conductor insulation free of visible damage”
• “Raceway supports installed”
• “Motor disconnect is accessible”
• “Voltage-drop calculation included in project record”
• “Conduit fill review required for this raceway”

A Pass means the entered item has been reviewed and accepted for the checklist purpose. A Fail means the item requires correction, verification, documentation, or a separate technical determination. A not-applicable entry is used when the checklist item does not apply to the particular equipment, feeder, branch circuit, raceway, or scope of work.

The Required item field separates ordinary observations from conditions that must be resolved before the checklist can show no required failures.

Checklist Completion Formula

The calculator counts rows by their entered status and calculates completion as:

\(\displaystyle \text{Completion percent} = \frac{\text{Passed items} + \text{Not applicable items}} {\text{Total items}} \times 100\)

It also calculates:

\(\displaystyle \text{Passed items} = \text{count of rows with status Pass}\)

\(\displaystyle \text{Failed items} = \text{count of rows with status Fail}\)

\(\displaystyle \text{Required failure count} = \text{count of failed rows marked Required item}\)

The completion percentage treats a not-applicable item as closed for checklist tracking. That does not mean the omitted work is acceptable; it means the listed check does not apply to the installation being reviewed.

A failed row remains outside the completed portion of the worksheet. If a failed row is marked Required item: Yes, it is included in the Required failures result and affects the inspection status.

Worked Inspection Result

Assume an electrical contractor reviews five checklist entries before requesting a rough-in inspection.

Item	Status	Required item
Feeder raceway supported	Pass	Yes
Equipment grounding conductor installed	Pass	Yes
Panelboard circuit directory complete	Fail	Yes
Motor branch circuit present	Not applicable	No
Raceway fill calculation attached	Pass	Yes

The calculator produces:

• Total items: 5 rows
• Passed items: 3 rows
• Failed items: 1 row
• Not applicable items: 1 row
• Required failures: 1 row

\(\displaystyle \text{Completion} = \frac{3 + 1}{5} \times 100 = \text{80\%}\)

The checklist remains incomplete because one item is failed. Since the failed panelboard directory is marked as required, the worksheet also reports one required failure. The practical next step is to correct or document that item, then update the row status after verification.

Electrical Review Uses

The calculator is suited to checklist administration around electrical work where numerous installation and documentation conditions must be tracked consistently.

Branch Circuit and Feeder Review

For branch circuits and feeders, inspection rows can organize checks for conductor identification, overcurrent device labeling, equipment grounding conductors, terminal connections, cable protection, raceway support, panel directories, and required working space.

The worksheet can identify that an item needs follow-up, but it does not calculate AWG or kcmil conductor size, ampacity, adjustment factor, correction factor, terminal rating, insulation temperature rating, or voltage drop. Those values must be calculated and verified separately using actual load, conductor, termination, ambient-temperature, and installation conditions.

Raceway and Conduit Layout

For conduit, tubing, and other raceway systems, the checklist can track whether a raceway-fill calculation exists, bends have been reviewed, pull points are accessible, supports are installed, bushings are present where required, and conductors are protected from physical damage.

A passed checklist entry is not a substitute for calculating raceway fill, determining conductor fill area, verifying pull geometry, or confirming the installed pathway matches the approved layout.

Load and Equipment Verification

The checklist can also organize records associated with service equipment, distribution equipment, motors, transformers, disconnects, and utilization equipment. Common entries may reference load-calculation documentation, breaker identification, motor nameplate review, disconnect accessibility, grounding and bonding verification, and equipment labeling.

The status count does not establish that a load calculation is correct, that a feeder has adequate ampacity, or that a protective device is properly selected. Those conclusions require the underlying electrical calculations and the adopted local requirements.

Inspection Status and Required Failures

The Inspection status is based on failed rows marked as required. When the Required failures result is zero, the worksheet reports:

No required failures entered

That result means no entered row is simultaneously marked Fail and Required item. It does not certify the installation, prove that every applicable checklist item was entered, or replace an inspector’s determination.

A practical internal workflow is:

1. Enter each inspection condition as an Item.
2. Select the current Status for every row.
3. Mark mandatory release, inspection, safety, or documentation items under Required item.
4. Resolve every failed required item.
5. Retain the worksheet with associated photographs, test records, torque records, manufacturer documentation, or calculation sheets when those records are required by the project.

Field Verification Boundary

The Electrical Inspection Checklist Calculator is a checklist-status worksheet. It counts entered Pass, Fail, and not-applicable rows and flags failed rows marked required.

It does not certify an inspection, installation, test result, or code-compliance conclusion. Final acceptance depends on the actual installation, approved plans, applicable electrical requirements, equipment listing and manufacturer instructions, test documentation where applicable, and the AHJ’s inspection process.