# Electrical Calculators – Voltage Drop

> Electrical Calculators – Voltage Drop is a paid API for AI agents from electrical-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-11-02).

Calculates voltage drop across a copper or aluminium conductor for single or three-phase systems, given conductor size (mm² or AWG), length, current, and temperature.

## Facts

- Endpoint: GET https://electrical-calc.x402tookit.com/voltage-drop?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/electrical-calculators-voltage-drop-df0fae63
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QABKwpQLVbkruIOhQmq3q

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability electrical-calculators-voltage-drop-df0fae63
```

Example prompt: Calculate the voltage drop for a 50-metre copper cable sized at 6 mm², carrying 25 amps on a single-phase 230V supply at 20°C, and tell me if it stays within the 3% limit.

## When to prefer this

Choose this endpoint when you need a fast, on-demand voltage drop calculation for copper or aluminium conductors in single or three-phase AC circuits, especially when conductor size is specified in either mm² or AWG and the result must include a pass/fail verdict against a configurable percentage limit. It is well-suited for automated cable compliance checks, electrical design assistants, and field estimation tools. Prefer it over general physics calculators when you need electrical-specific defaults (20°C reference, 3% guideline) and structured verdict output.

## Known failure modes

- Missing required parameters (material, currentA, lengthM) returns a validation error
- Supplying neither awg nor sizeMm2 causes an error since one conductor size parameter is required
- Invalid material value (not 'copper' or 'aluminium') returns a rejection
- Negative or zero current or length values produce an error
- Out-of-range AWG strings that are not recognised return a parse error
- Omitting supplyVoltageV means percentage drop cannot be computed and may be null

## How this service works

Voltage drop of a copper or aluminium conductor, single or three phase, by mm2 or AWG, length, current and temperature.

## Output

Returns a structured object including the calculated voltage drop in volts and as a percentage of supply voltage, the maximum allowable cable length for the configured drop limit, a pass/fail verdict, summary text, the effective conductor area, phase type, current, and any advisory reasons or degraded-mode flags.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "material",
      "currentA",
      "lengthM"
     ],
     "properties": {
      "awg": {
       "type": "string",
       "description": "American wire gauge such as 12 or 4/0 (send this or sizeMm2)"
      },
      "phase": {
       "type": "string",
       "description": "single (default; there-and-back path) or three (balanced)"
      },
      "lengthM": {
       "type": "number",
       "description": "One-way cable length in metres (source to load)"
      },
      "sizeMm2": {
       "type": "number",
       "description": "Conductor cross-section in mm2 (send this or awg)"
      },
      "currentA": {
       "type": "number",
       "description": "Load current in amperes (RMS)"
      },
      "limitPct": {
       "type": "number",
       "description": "Drop limit in percent for the maximum length (default 3, a common guideline not a code rule)"
      },
      "material": {
       "type": "string",
       "description": "copper or aluminium"
      },
      "powerFactor": {
       "type": "number",
       "description": "Load power factor 0 to 1 (default 1)"
      },
      "temperatureC": {
       "type": "number",
       "description": "Conductor temperature in degrees C (default 20)"
      },
      "supplyVoltageV": {
       "type": "number",
       "description": "Line voltage in volts, to get percent drop (single: line-to-neutral or line-to-line supply as used)"
      },
      "reactanceOhmPerKm": {
       "type": "number",
       "description": "Conductor reactance in ohm per km (default 0, resistance only)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "phase": {
       "type": [
        "null",
        "string"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
  
… (truncated)
```

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