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Electrician’s Helper will take the hassle out of looking up electrical codes and doing complex calculations for installations.

With Electrician’s Helper you can...

● Calculate voltage, current and power in 3 phase delta and wye circuits.

● Find the ampacity of a conductor as per the NEC and CEC tables.

● Calculate the voltage drop in a line based on length, size, current and temperature.

● Find the total box fill by entering the size and number of conductors, straps and clamps.

● Find the maximum number of conductors allowed in a particular size raceway based on NEC and CEC rules.

● Determine what size raceway is needed for a bundle of conductors.

● Find the maximum bend radius of a conduit.

● Find the maximum capacitor kvar for a motor and the current reduction obtained.

● Find the motor current, heater current, breaker required, wire size, starter and conduit size for a particular 3 phase motor.

● Find the full load current of an induction, squirrel cage, and synchronous motor.

● Find the locked rotor current of a single or 3 phase motor.

● Estimate the Maximum Pull Tension.

● Calculate voltage, current and kVA of single and three phase transformers.

● Do basic ohm’s law calculations.

● Find decimal equivalents of fractions.

● Convert temperature scales.

● Look up connector configurations.

● Look up NEC tables 311.60(C)(67-84)

Tested with iOS 9.0 thru iOS 13.5

Please note that this is a calculator for codes used in the NEC and CEC. It is not a replacement for the code books.

What’s New

Version 2.1.1

Updated to NEC 2020. Improved some fucntions.

Ratings and Reviews

4.6 out of 5
10 Ratings

10 Ratings

Joey8896784 ,


I have this app it’s totally helpful, I use it all the time.

ASH11281 ,

Conduit calculator not working!

I love this app but recent changes/upgrades has left my what conduit size calculator not working. Please help, it’s the most used tool I have in the app!!

Jeffrey919 ,

I like it

If you know what your doing this app is great. It can use a few minor improvements that I'm sure will come. It helps me do some quick calculations easy, and that's what technology's all about. I have about 10 electricians that work for me, and I will recommend it to all of them with I phone's. Quicker calculating and less mistakes. means more $ in my pocket, in return More $ in the journeymans pocket. ;) worth every penny. Ps. This is the 2nd app I ever wrote a review on. I phone user since the beginning. Thanks for your hard work on the app!!

Florida electrical contractor


Sam Virgillo
42.7 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, French

Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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