Voltbox: Electrician Toolbox

2.3

TapForge Studios

0.00

0 reviews

1+
Downloads

Free

Wire, breaker & conduit calculators plus a full multimeter guide. Offline.

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1+ downloads

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About Voltbox: Electrician Toolbox

Voltbox: Electrician Toolbox is a productivity app developed by TapForge Studios.

Download Statistics

Voltbox: Electrician Toolbox has been downloaded 2 times. In the last 30 days, the app was downloaded 2 times.

User Ratings

The app has no ratings yet.

App Information

Voltbox: Electrician Toolbox is FREE to download. The APK download size is 4.43 MB. The latest version available is 2.3. The last update was on August 13, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on Google Play July 2026.

Description

Voltbox is the field toolbox for electricians, apprentices, and serious DIYers — a
fast, offline set of calculators and references built by someone who's actually run
pipe and pulled wire. No sign-in, no clutter, no ads on your calculations. Just the
numbers you need, on the job, in your pocket.

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WHAT'S INSIDE
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⚡ WIRE & BREAKER SIZING (new)
Enter a load in amps — or watts and voltage — and Voltbox returns the minimum
conductor, the standard breaker (NEC 240.6), the largest breaker that conductor may
legally carry, and the equipment ground from Table 250.122. A breaker-to-conductor
quick chart for 60 °C and 75 °C terminations and a common-circuits reference come
built in.

🔌 MULTIMETER GUIDE (new)
Learn to use your meter the right way, written around the Fluke meters most techs
actually carry — the 115, 116, 117 and 87V, plus the clamps. Safety and CAT ratings,
the live–dead–live check, input jacks, symbol legend, voltage, continuity and
resistance, ghost voltage and low-Z, and the mistakes that cost fuses. Advanced
sections cover current measurement, capacitance, diode, frequency, temperature,
microamp flame-rod testing, and a full field-procedure playbook.

📐 CONDUIT BENDING
90° stub, back-to-back, offset, three-bend saddle, four-bend saddle, and rolling
offset. Enter your numbers and get exactly where to mark and how far to bend — marks
shown as tape-measure fractions with the decimal underneath.

🧮 OHM'S LAW
Enter any two of volts, amps, ohms, or watts and Voltbox solves the other two, with
the formulas shown so you can check the work.

🧵 CONDUIT FILL
Add your conductors by type, size, and quantity, pick the conduit, and get the
smallest trade size that stays within NEC Chapter 9 fill percentages.

🎨 RESISTOR COLOR CODE
A 4, 5, or 6-band picker with a live-drawn resistor and computed value, tolerance,
and temperature coefficient.

📊 WIRE AMPACITY
NEC 310.16 copper and aluminum ampacities at 60/75/90 °C with the small-conductor
rules built in.

📉 VOLTAGE DROP
Single- and three-phase voltage drop in volts and percent, with a 3% pass/fail check.

📦 BOX FILL
NEC 314.16 box-fill volume from conductors, devices, clamps, and grounds.

🔋 POWER & MOTOR
kVA to volts to amps (single and three-phase), plus a horsepower–kilowatt converter.

🌎 GROUNDING
Equipment grounding conductor (250.122) and grounding electrode conductor (250.66)
sizing.

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WHY VOLTBOX
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• Works 100% offline — in the panel, the attic, the crawlspace, no signal needed.
• No account and no personal data collection. Your calculations never leave the phone.
• Clean, readable, one-handed layout that works with gloves on.
• Light and dark themes that follow your system setting.
• Built and maintained by a working-trade developer, not a content mill.

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FREE & PRO
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Most of Voltbox is free, including Ohm's law, resistor codes, conduit fill, ampacity,
grounding, the everyday conduit bends, the Wire & Breaker sizer at standard
conditions, and the core of the Multimeter Guide.

Voltbox Pro is a one-time purchase — no subscription. It unlocks the advanced conduit
bends, Voltage Drop, Box Fill, Power & Motor, the Wire & Breaker derating engine
(ambient temperature, raceway bundling, termination ratings), and the advanced half
of the Multimeter Guide — and it removes the single banner ad.

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Voltbox is an estimating and reference aid. Always verify against the edition of the
National Electrical Code (NFPA 70) adopted in your jurisdiction, and follow your
employer's safe-work practices and NFPA 70E. Work de-energized whenever possible.

NEC® and NFPA 70® are registered trademarks of the National Fire Protection
Association. Fluke® is a registered trademark of Fluke Corporation. TapForge Studios
is not affiliated with, sponsored by, or endorsed by the NFPA or Fluke.

Questions or a feature request? contact@tapforgeapps.com

Recent changes:
TapForge Studios Cross-Promotion:
Optimized for Android 15: Full support and compatibility for devices running the latest Android versions (Target SDK 37).
Startup Improvements: Refined application initialization flow to improve reliability and cold-start performance on high-end devices.
Bug Fixes: Resolved a rare crash related to background service initialization during startup.

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More data about Voltbox: Electrician Toolbox

Price	Free to download
Total downloads	2
Recent downloads	2
Rating	No ratings
Ranking	Not ranked
Version	2.3
APK size	4.43 MB
Number of libraries	?
Suitable for	Everyone
Ads	Contains ads

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Voltbox: Electrician Toolbox compared with similar apps

Common keywords of similar apps

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Keywords missing from this app

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Downloads over time

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Voltbox: Electrician Toolbox has been downloaded 2 times. Over the past 30 days, it has been downloaded 2 times.

Changelog of Voltbox: Electrician Toolbox

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Developer information for TapForge Studios

TapForge Studios

contact@tapforgeapps.com

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Technologies used by Voltbox: Electrician Toolbox

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