Source: https://guthlabs.ai/docs/instruments/ground-loop-common-impedance-voltage-estimator/implementation/

instrument implementation / implementation-contract

# Ground Loop / Common-Impedance Voltage Estimator implementation

A source-bound implementation contract for Ground Loop / Common-Impedance Voltage Estimator; deployment and executable qualification remain separate.

Status: **VERIFIED_CLEAN**Lifecycle: **implementation-contract**

## Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

**Record owner**: Guth Instruments

**Lifecycle**: verified-clean

**Evidence ID**: t5-071

**Effect**: Computation or source lookup only

## Input and validation requirements

The extreme-magnitude vector produces 1e616 V mathematically, which overflows standard JavaScript Number arithmetic to Infinity. The instrument should reject or explicitly flag overflow rather than return Infinity without warning.

## Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

## Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

````
{
  "inputs": {
    "return_current_A_rms": 4,
    "ground_resistance_ohm": 0.25,
    "ground_inductance_H": 0.002387324,
    "frequency_Hz": 50
  },
  "expected_outputs": {
    "noise_voltage_magnitude_V_rms": 3.1623
  },
  "working": "ω=2πf=2×3.14159265×50=314.159265 rad/s. X_L=ωL=314.159265×0.002387324≈0.750000 Ω. |Z|=sqrt(R²+X_L²)=sqrt(0.25²+0.75²)=sqrt(0.0625+0.5625)=sqrt(0.625)=0.790569 Ω. Vnoise=I|Z|=4×0.790569=3.162277 V≈3.1623 V RMS."
}
````

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/ground-loop-common-impedance-voltage-estimator/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/ground-loop-common-impedance-voltage-estimator/mechanism/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/ground-loop-common-impedance-voltage-estimator/qualification/>)

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json`

- `evidence-tranche5/tranche5-results.json`