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SparkQuote NEC calculators

ai.sparkquote/nec-calculators · v1.0.1

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

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Last check

Reachable, 10 tools, protocol 2025-06-18 · checked 2026-10-17

Test & rating

B 76/100

What it does: 10 tools · 10 read, 0 write (incl. delete/pay)

Test call ohms_law: failed — tool error: Fill in exactly two positive values; the other two are calculated. Source: SparkQuote, NEC 2023 (NFPA 70): https://spar (1,059 ms)

How the rating is made
  • Answers without login: +30
  • Speed of first answer: +6
  • Lists tools: +10
  • Tool descriptions: +15
  • Parameter descriptions: +10
  • Read/write annotations: +5
  • Safe test call: 0
  • More than 80 tools: 0

Tested 2026-10-17. Fixed rules, no AI model. Grade A needs a successful real call.

Install

Remote URL
https://sparkquote.ai/mcp

Tools

10 tools listed at last check
  • 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 conductor
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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)).
  • 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.

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