zmVault/timestamped/2026-03-05_10-26-48.md

id, title, tags, date-created, daily

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

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)