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Junction Box Straight and Angle Pull Sizing Calculator — result sheet
Estimate a planning envelope for horizontal and vertical straight-pull and angle-pull raceway rows using the entered 8× and 6× rules plus other-entry sums.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Straight-pull basis = 8 × largest raceway; angle-pull basis = 6 × largest raceway + sum of other raceways in the same row; choose the larger horizontal and vertical bases for the planning envelope.
The page isolates the common straight-pull and angle-pull arithmetic so a designer can see which row controls width and height. It does not pretend to perform a complete electrical-code design for every box, conductor, splice, cable, or jurisdiction.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Largest horizontal straight-pull raceway — trade-size units; minimum 0; maximum 10000
- Largest vertical straight-pull raceway — trade-size units; minimum 0; maximum 10000
- Largest horizontal angle-pull raceway in the row — trade-size units; minimum 0; maximum 10000
- Sum of other horizontal angle-pull raceways in that row — trade-size units; minimum 0; maximum 10000
- Largest vertical angle-pull raceway in the row — trade-size units; minimum 0; maximum 10000
- Sum of other vertical angle-pull raceways in that row — trade-size units; minimum 0; maximum 10000
Worked example
| Input | Value |
|---|---|
| Largest horizontal straight-pull raceway | 1.5 |
| Largest vertical straight-pull raceway | 1.5 |
| Largest horizontal angle-pull raceway in the row | 1.5 |
| Sum of other horizontal angle-pull raceways in that row | 1.5 |
| Largest vertical angle-pull raceway in the row | 1.5 |
| Sum of other vertical angle-pull raceways in that row | 1.5 |
Each straight-pull basis is 12; each angle-pull basis is 10.5, so the minimum planning width and height are 12 trade-size units.
Assumptions and limits
- The entered values represent the applicable raceway metric designator or trade-size convention for the adopted code edition.
- The horizontal and vertical rows are entered separately and the other-entry fields are sums, not another largest raceway.
- A zero row means that pull type is not included in this focused scenario.
- Angle-pull other entries are not accepted without a largest raceway for the same row.
- The result is a minimum arithmetic basis in trade-size units, not a selected manufactured box dimension.
- Conductor fill, bending space, splices, grounding, cable entries, handholes, wireways, and exceptions are outside this page.
- Verify the code edition adopted by the authority having jurisdiction and have the complete installation checked by a qualified electrical professional.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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