---
title: "NEC Tierra Calc - Bewertungen, Einnahmen und Downloads in Mexiko | Apple App Store"
description: "Calculadora NEC Tierra Calc para electricistas profesionales. Funciona 100% sin conexion.  NEC grounding size calculator for electricians, apprentices, and electrical engineers. Three calculators in o"
---

# NEC Tierra Calc — Mexiko
> NEC Art.250 Puesta Tierra

![NEC Tierra Calc App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/09/e9/5e/09e95e55-d52a-ecae-f8c3-5ba7636b532d/AppIcon-0-0-1x_U007emarketing-0-11-0-85-220.png/434x0w.png)

**Developer:** [Rizvan Adzhoian](https://apptail.io/de/developer/rizvan-adzhoian-zsuKac)
**Category:** Utilities
**Rating:** N/A (0 ratings)
**Price:** Free
**Bundle ID:** com.electools.groundingSizeCalculator
**Store:** Apple App Store
**Country:** Mexiko
**Version:** 1.0.8 (released 2026-06-10)
**Original Release:** 2026-04-24
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/mx/app/app/id6763312724)
**AppTail Page:** [https://apptail.io/de/app/nec-tierra-calc-DHDA/mexico](https://apptail.io/de/app/nec-tierra-calc-DHDA/mexico)

## NEC Tierra Calc Description
Calculadora NEC Tierra Calc para electricistas profesionales. Funciona 100% sin conexion.

NEC grounding size calculator for electricians, apprentices, and electrical engineers. Three calculators in one app: Equipment Grounding Conductor (EGC) from Table 250.122, Grounding Electrode Conductor (GEC) from Table 250.66 with sole-connection exceptions, and Bonding Jumper from Table 250.102(C)(1) with the 12.5% rule. Works 100% offline on the job site.

Whether you're sizing an EGC for a 200A circuit, determining the GEC for a 500 kcmil service with a ground rod electrode, or calculating a bonding jumper for parallel service conductors, this calculator gives you accurate NEC-compliant results in seconds.

THREE CALCULATORS IN ONE:

EQUIPMENT GROUNDING CONDUCTOR (EGC):
- Size EGC per NEC Table 250.122 - all 21 table rows from 15A to 6000A
- All 37 standard OCPD ratings per NEC 240.6(A) selectable - including 30A, 40A, 50A, 70A, 125A
- Copper and aluminum conductor support
- Voltage drop adjustment per NEC 250.122(B) - proportionally increase EGC when circuit conductors are upsized
- Original and adjusted wire size selection for accurate proportional calculation
- Automatic rounding up to next standard OCPD rating

GROUNDING ELECTRODE CONDUCTOR (GEC):
- Size GEC per NEC Table 250.66 based on service conductor size
- Support for copper and aluminum service conductors
- Parallel sets calculation (1-6 sets) with automatic equivalent area computation
- Sole-connection exceptions per NEC 250.66(A), (B), and (C):
  - 250.66(A): Rod, pipe, or plate electrode - GEC capped at #6 Cu / #4 Al
  - 250.66(B): Concrete-encased electrode - GEC capped at #4 Cu / #4 Al
  - 250.66(C): Ground ring - GEC capped at #2 Cu / #2 Al
- Five electrode types: Water Pipe, Rod/Pipe/Plate, Concrete-Encased, Ground Ring, Other

BONDING JUMPER:
- Size bonding jumpers per NEC Table 250.102(C)(1)
- Same ranges as Table 250.66 for conductors within table limits
- Automatic 12.5% rule for service conductors exceeding 1100 kcmil Cu or 1750 kcmil Al
- Parallel sets support with combined circular mil area calculation

CALCULATION RESULTS INCLUDE:
- Conductor size in AWG or kcmil with alternative material
- Exception applied with NEC section reference
- NEC article references for every result
- Detailed notes for parallel sets and electrode exceptions

NEC REFERENCES INCLUDED:
- NEC Table 250.122 - Equipment grounding conductor sizing
- NEC 250.122(B) - EGC increase for voltage drop
- NEC Table 250.66 - Grounding electrode conductor sizing
- NEC 250.66(A) - Rod, pipe, or plate electrode exception
- NEC 250.66(B) - Concrete-encased electrode exception
- NEC 250.66(C) - Ground ring exception
- NEC Table 250.102(C)(1) - Bonding jumper sizing
- NEC 250.102(C)(1) - 12.5% rule for large conductors

PRO FEATURES (one-time purchase):
- No ads - clean interface for professionals
- Save grounding calculation history with labels
- Export calculations as PDF reports for permits and records
- Dark theme support

PERFECT FOR:
- Licensed electricians sizing grounding conductors daily
- Electrical apprentices and journeyman exam preparation
- Electrical engineers specifying grounding systems
- Electrical inspectors verifying conductor sizes

OFFLINE & PRIVACY:
- Works 100% offline - no internet needed on the job site
- No account required
- No data collection - your calculations stay on your device

Simplify your grounding and bonding calculations on the job site.

## NEC Tierra Calc Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/c7/d1/d2/c7d1d258-9c8b-2f73-c28b-1d302745ccf8/ipad_01_main_default.png/2064x2752.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/41/a6/74/41a674f5-3812-f269-7334-36a3049f958a/ipad_02_gec_exception.png/2064x2752.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/48/5b/5e/485b5e46-39a7-9dd9-144e-9c9468c76117/ipad_03_history.png/2064x2752.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/af/36/39/af36390e-e591-5261-df4d-a28f466be415/ipad_04_settings.png/2064x2752.png)



## NEC Tierra Calc In-App Purchases
| Item | Price |
|------|-------|
| Pro Unlock | $69.00 |

## NEC Tierra Calc Store Rankings
| Chart | Country | Category | Rank |
|-------|---------|----------|------|
| Top Bezahlt | Mexiko | Utilities | #9 |
| Top Bezahlt | Mexiko | Overall | #49 |




---

## About AppTail

[AppTail](https://apptail.io/de) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends.

- [Search Apps](https://apptail.io/de)
- [Top Charts](https://apptail.io/de/top-iphone-apps)
- [Sign Up for Full Access](https://apptail.io/de/account/signup?utm_campaign=ai-crawl&utm_content=footer)

*Data provided by [AppTail](https://apptail.io/de) - Mobile App Intelligence Platform*