load/unit describe the design load; length_m is the positive one-way route length.
voltage is line-to-line for 3phase and phase-to-neutral for 1phase. DC is unsupported.
ambient_temp_c is air temperature above ground and soil temperature underground;
None uses the configured dataset's reference temperature. num_circuits and depth_m
must fall within the configured data. The model uses V90 at 75 C or X90 at 90 C.

mcb_rating_amps enables the approximate AC loop check; supply_loop_impedance_ohm
is the non-negative external source-loop magnitude (default zero is an assumption).
Supplying a nonzero source-loop magnitude requires mcb_rating_amps.
Check the actual protective device and measured supply impedance independently.
check_fault enables active AND earth adiabatic checking using fault_current_ka and
fault_time_s. The earth conditions default to those active conditions; override them
with earth_fault_current_ka and/or earth_fault_time_s for the actual earth fault.
Earth fault overrides require check_fault=True.
Omitted fault checks are reported as not requested. The earth material is independent
of the active material. An experimental selection is not an installation approval.
cable_construction="flat_2c_earth" selects a dedicated two-loaded-conductor profile
and requires phase="1phase". For in_thermal_insulation, explicitly choose
partially_surrounded or completely_surrounded; unenclosed_in_air uses none.
Unsupported construction/condition combinations are rejected without generic fallback.
The generic default preserves the existing dataset column and does not identify a
physical cable construction or insulation exposure.

length_m is the one-way route length, size_mm2 must exist in the configured dataset,
and voltage is line-to-line for 3phase or phase-to-neutral for 1phase. worst_case_pf
uses the impedance magnitude instead of the specified power factor. Threshold flags
apply only to this voltage-drop model and do not establish standards compliance.

ambient_temp_c denotes soil temperature for underground installations and air
temperature otherwise. None uses the dataset's reference value. Unsupported
ranges are rejected; factors between rows use conservative lookup. Installation
labels do not describe every cable construction, grouping layout or soil condition.

nominal_phase_voltage is phase-to-earth voltage. The external source-loop magnitude
defaults to zero and must be supplied for a realistic check. length_m enables the
route-length pass/fail comparison; without it no route check is performed. Material
is specified separately for active and earth conductors. Generic B/C/D trip
multipliers do not verify a specific device's clearing time or guarantee disconnection.

Supply the applicable fault current in kA and actual protective-device clearing
time in seconds (0 < time <= 5). The default 0.1 s is an assumption, not a device
rating. k comes from configured data and assumes the model's initial/final conductor
temperatures. This check alone does not approve an active or earth conductor.

Parameters and assumptions match size_cable. The report identifies optional checks
as passed, failed or not requested; it does not certify standards compliance.