# SparkQuote NEC calculators

> NEC 2023 electrical calculators: wire size, ampacity, voltage drop, conduit fill, box fill, load.

- name: ai.sparkquote/nec-calculators
- version: 1.0.1
- connection class: R0 (autonomous)
- trust: 83/100 flags: no-repository
- quality: 89/100 (new)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/ai.sparkquote%2Fnec-calculators
- tools: https://api.protogrid.dev/v1/servers/ai.sparkquote%2Fnec-calculators/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "nec-calculators": {
      "type": "http",
      "url": "https://sparkquote.ai/mcp"
    }
  }
}
```


## Trust

- hygiene: 80
- liveness: 100
- freshness: 100
- provenance: 55
- drivers: +dns-namespace +website +reachable +uptime-100% +updated-6d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 89/100 (new)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 100 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 10 of 10 tools declare readOnlyHint or destructiveHint
- pass `tools.directory_hints`: every tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
- pass `tools.token_cost`: about 2,875 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: n/a (weight 15)

- n/a `stability.changes`, `stability.rug_pull`: tool history recorded for 6 of the 7 days needed

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 10, about 2,875 tokens to load them all
- tool set hash: dcbccfd2a427dbc38bd134490bea7509
- tools last changed: 2026-10-15T02:24:17.550Z
- badge: [![protogrid quality](https://protogrid.dev/badge/ai.sparkquote/nec-calculators.svg)](https://protogrid.dev/servers/ai.sparkquote/nec-calculators)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-10-15 `wire_size` changed (description)
  - before: Minimum conductor size for a circuit: NEC Table 310.16 ampacity at the termination temperature rating, the 240.4(D) small-conductor limits, voltage drop over the run, and the Table 250.122 equipment grounding conductor.
  - after: Minimum conductor size for a circuit: NEC Table 310.16 ampacity at the termination temperature rating, the 240.4(D) small-conductor limits, voltage drop over the run, and the Table 250.122 equipment grounding conductor, increased in proportion under 250.122(B) when voltage drop upsizes the conductors.

Full history: https://api.protogrid.dev/v1/servers/ai.sparkquote%2Fnec-calculators/changes

## Remotes

- https://sparkquote.ai/mcp (streamable-http, auth none, reachable true, uptime30d 1)

## Packages

_none_

## Tools (10)

- `bid_calculator`: Electrical bid price from materials, markup, labor hours and rate, job costs, overhead and a target net margin (price = break-even / (1 − margin)).
- `box_fill`: Minimum outlet box volume from NEC 314.16(B): conductor, device (2 each), clamp and grounding allowances times the Table 314.16(B) volume for the largest conductor.
- `conduit_fill`: Percent fill and maximum number of THHN/THWN-2 conductors of one size in EMT or PVC Schedule 40, from NEC Chapter 9 Tables 1, 4 and 5.
- `load_calculator`: Dwelling service load by the NEC 220.82 optional method: 3 VA/ft² lighting, small-appliance and laundry circuits, fixed appliances, demand factor, heating or cooling, and the minimum standard service size. Leave an appliance out to count it as 0 VA.
- `nec_ampacity`: Allowable ampacity of one insulated conductor from NEC Table 310.16 (not more than three current-carrying conductors in a raceway or cable, 30°C ambient), before any adjustment or correction factors and before the 240.4(D) small-conductor limits.
- `ohms_law`: Ohm's law and power: give exactly two of voltage, current, resistance and power; the other two are calculated.
- `panel_schedule`: Lays circuits out on a 120/240 V single-phase or 208Y/120 V three-phase panel and totals the load per phase with the imbalance.
- `voltage_drop`: Voltage drop for a given conductor size, current and one-way length, single- or three-phase, from NEC Chapter 9 Table 8 circular mils (VD = 2·K·I·L / CM, or √3 for three-phase).
- `watts_to_amps`: Current drawn by a load in watts at a voltage and power factor, single- or three-phase, plus the 125% continuous-load value.
- `wire_size`: Minimum conductor size for a circuit: NEC Table 310.16 ampacity at the termination temperature rating, the 240.4(D) small-conductor limits, voltage drop over the run, and the Table 250.122 equipment grounding conductor, increased in proportion under 250.122(B) when voltage drop upsizes the conductors.