This is a republishing of Electrician Bible application, and the reason is that due to natural disaster I lost my developing computer with all the information on it. For that reason I cannot upload more software update to the existing (Electrician Bible) in Google play store.
We apologize for any inconvenience that this may have caused.

You must be in android version 4.0 Ice Cream Sandwich or greater, and have an internet connection on your device.

A must have utility for electrician's, electrical contractors or those looking to pass an electrical certification. 
Calculations per National Electric Code 2020.
Calculations included:
Voltage Drop
-Circuit’s Conductors voltage drop.
-Minimum Conductor Size.
Pipe Bend
-Offset.
-Three bend saddles.
-Rolling Offset
-Detail Conduit Support.
-Segment bending.
-Double 45 Degree 90.
Raceway calculations.
-Raceway size calculation.
-Raceway calculation
-Maximum number of same size wires
-Conduit Support\n-Conductors Support
-Conduit spacing
-Conductor Applications and Insulations
-Cable Tray Calculation
-Metric Trade Size Designators.
-R90, RW75, TWN75,T90, TW, TW75, TWU, TWU75
Ampacity
-Conductor Ampacity, wire size.
-table 301.15(B)(16).
Box Fill
-Sizing outlet box.
-Sizing Pull box.
Load calculation (Residential)
-Single family.
-Range and dryer’s calculation.
-Service \ Feeder Conductors.
Transformers
-Transformers Size.
-Transformers OCPD calculations.
-Transformers Short Circuit calculations.
-Delta-Wye transformers Calculations.
Motors calculations
-Motor OCPD calculations.
-Motor NEMA Starters calculation.
-Motor Locked Rotor Calculation.
-A/C motor calculation.
Electrical schematics
- Delta-delta transformers.
- Delta-Wye transformers.
- Three way switch.
- Start/stop AC motor.
- 3 phase A.C. Motor Winding and Connections Wye
- 3 phase A.C. Motor Winding and Connections Delta
- Network cable wiring pin-out.
- Wye Start-Delta Run.
- Electrical Symbols
Burial Depth
-600v or less.
-Over 600v.
Grounding
-Equipment Grounding
-Grounding Electrode Conductor.
-Grounded Conductor, Main Bonding Jumper, System Bonding Jumper, and Supply-Side Bonding Jumper for Alternating-Current Systems.
NEMA Device Configurations.
-Plugs.
-Enclosures.
Electrical Calculations.
-Formula Wheel.
-Power Triangle.
-Series/Parallel.
NEC Tables section.
Color Code.
-Resistors color code.
-Phase wire color code.
-Panel color code.
NEC Calculations Examples.
-Bank load calculation.
-Store load calculation.
-Scholl load calculation.
-Multi-family dwelling load calculation.
-Office building load calculation.
-Restaurant load calculation.
-Motor I load calculation.
-Motor II load calculation.
-Ranges load calculation.
2014 NEC Code Changes.
Units Converter.
- Temperature.
- Energy.
- Length.
- AWG to millimeter.
- Watts to Lumens.
- Torque.
- Fraction calculator.
NFPA 70E Table 130.7 (C) (16).
Arc Flash Calculation.
- NFPA 70E Table 130.7 (C) (15)(a).
Torque Specs for lugs and bolts.
- Squared D.
- GE.
-Search capability.
-Favorites.
-more coming soon.

release version history:
(1.3.0.4) December 08 2018
(1.3.0.3) November 01 2018
(1.3.0.1) October 05 2018 
(1.3) August 19 2018
(1.2.6.4) May 28 2018
(1.2.6.3) Dec 30, 2017
(1.2.6.21) Jan 27, 2017
(1.2.6.20) Jan 17, 2017
(1.2.6.17) Nov 26, 2016
(1.2.6.16) July 16, 2016
(1.2.6.15) Dec 09, 2015
(1.2.6.14) Feb 28, 2015
(1.2.6.13) Jan 12, 2015
(1.2.6.12) Dec 20, 2014
(1.2.6.11) Nov 5, 2014
(1.2.6.10) Sep 22, 2014
(1.2.6.9) Aug 15, 2014 
(1.2.6.8) August 06, 2014
(1.2.6.7) June 15, 2014
(1.2.6.6.1) May 20, 2014
(1.2.6.6) May 10, 2014
(1.2.6.5) May 03, 2014
(1.2.6.4) April 20, 2014
(1.2.6.3) February 7, 2014
(1.2.6.1) January 18, 2014
(1.2.6.0.2) Dec 10, 2013
(1.2.6.0.1) Dec 4, 2013
(1.2.6) Dec 1, 2013
(1.2.5.2) Oct 8, 2013
(1.2.5.1) Aug 20, 2013
National Electrical Code and "NEC" are registered trademarks of the NFPA
If you like to report bugs or suggestions, please send them to electricianbible@gmail.com

Best Tool for the professionals
Electrician, Electrical contractors, etc.