UL 
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Calculator Inputs
Switching units converts current conduit ID and cable OD inputs.
Default mode lets users add several different cable types and see them together in the conduit visualization.
Input actual inner diameter. Default is close to 1 in EMT reference ID.
High-power PoE increases heat consideration in dense bundles.
Used to estimate future expansion margin.
If more than 2 bends are selected, target fill is reduced by 5 percentage points.
Used for recommendation notes only.
Optional. This will appear in the exported result table.
Optional installation note for engineer review.
Formula basis: Fill ratio = total cable area ÷ conduit inner area × 100. This calculator uses circular-area estimation from OD / ID. It is a preliminary engineering aid and does not replace local code review, pulling tension calculation, bend-radius review or heat-rise assessment.
Calculation Results
Current Fill Ratio
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Calculated from selected cable OD and quantity.
Practical Target
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Adjusted by PoE level, spare capacity and route bends.
Jam Ratio
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Conduit ID ÷ largest cable OD. Mainly used for three-cable jamming risk.
Cable / Conduit Area
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Total cable area versus conduit inner area.
Enter inputs and calculate to see status.
Jam-risk check will appear after calculation.
Bend-complexity adjustment will appear after calculation.
Recommended Conduit Size
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Recommended ZION Cable Type
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Conduit Fill Visualization
Cable circles are scaled by actual OD versus conduit ID, so their area ratio matches the calculated fill ratio. The placement pattern is still a simplified visual aid and does not simulate pulling tension, cable stiffness, installation sequence or lubrication condition.
PoE note: Select PoE+ or PoE++ to check whether a lower practical fill target should be considered for heat and maintenance margin.
Area formula: Cable area = π × (OD ÷ 2)². Conduit area = π × (ID ÷ 2)². For mixed bundles, each cable type is calculated separately and then summed.
Exportable Result Table
| Item | Input / Result | Engineering Meaning | Action |
|---|---|---|---|
| Calculation Status | Not calculated yet | Fill ratio and recommendation will appear after calculation. | Enter inputs and click Calculate. |
| Prepared by ZION Communication — conduit fill result for preliminary engineering and RFQ review. | |||
Note: CSV export includes the table footer text “Prepared by ZION Communication”. For project submission, attach actual cable datasheets and conduit specifications for final engineering confirmation.
