---
id: 2026-03-05T10:26:48-0500
title: 2026-03-05 10:26:48
tags:
  - status/draft
date-created: 2026-03-05T10:26:48-05:00
daily: "[[2026-03-05]]"
---
# 2026-03-05 10:26:48

## Python SQLite Voltage Drop Calculator

Python script to account for voltage drop
based on various factors given in various forms

Python to handle calculation, defaults.
SQLite to store conductor properties
(resistance, reactance)

Allowable voltage drop given by
* percent overall
* percent per n feet
* volts overall
* volts per n feet

```python
import math

"""
current
apparent_power
voltage
phases
wire_size
parallel_runs
wire_material
conduit_material
"""

if (!current) {
    current = apparent_power / voltage
}

if (phases = 3) {
    max_resistance = voltage_drop_volts / math.sqrt(3) * current
}
else {
    max_resistance = voltage_drop_volts * current * 2
}

power_factor_angle = math.acos(power_factor)

effective_z = ac_resistance * math.cos(power_factor_angle)
    + reactance * math.sin(power_factor_angle)
```