Source: https://guthlabs.ai/docs/instruments/electrical-safety-shock-current-reference/implementation/

instrument implementation / implementation-contract

# Electrical Safety / Shock Current Reference implementation

A source-bound implementation contract for Electrical Safety / Shock Current Reference; 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**: t7-113

**Effect**: Computation or source lookup only

## Input and validation requirements

A zero body-resistance input produces an undefined division result and must be rejected. The reference profile is also under-specified because the actual IEC 60479-1 table, waveform, frequency, current path, and duration-dependent thresholds are not supplied; the branch classifications above therefore use explicitly labeled illustrative thresholds rather than constituting a safety certification.

## 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": {
    "voltage_V": 120,
    "body_resistance_ohm": 100000,
    "duration_s": 1,
    "waveform": "50/60-Hz sinusoidal AC assumed"
  },
  "expected_outputs": {
    "touch_voltage_V": 120,
    "estimated_current_A": 0.0012,
    "estimated_current_mA": 1.2,
    "hazard_band": "AC-2: above 0.5 mA through 10 mA in the simplified educational convention"
  },
  "reference_data": {
    "perception_boundary_mA": 0.5,
    "let_go_boundary_mA": 10,
    "severe_contraction_boundary_mA": 30,
    "source_convention": "Widely tabulated standard value, simplified 50/60-Hz AC educational shorthand; not a complete normative IEC 60479-1 table",
    "classification_rule": "AC-1 if I≤0.5 mA; AC-2 if 0.5 mA<I≤10 mA; AC-3 if 10 mA<I≤30 mA; AC-4 if I>30 mA"
  },
  "working": "I=V/R=120 V/100000 Ω=0.0012 A. Convert to milliamperes: 0.0012 A×1000=1.2 mA. Since 0.5 mA<1.2 mA≤10 mA, the simplified classification is AC-2. The supplied touch voltage is 120 V."
}
````

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/electrical-safety-shock-current-reference/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/electrical-safety-shock-current-reference/mechanism/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/electrical-safety-shock-current-reference/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-tranche7/tranche7-results.json`