Mike Holt Enterprises Electrical News Source

Download for Free - Mike Holt's Electrical Calculator App


April 22, 2022
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Have you downloaded the app yet? It's amazing, and you'll love having the power at your fingertips! I listened to your needs and worked hard for a long time on something that I felt would be of value to you all. It's a practical and useful app for anyone in the field - electrician, inspector, instructor, contractor and engineer, and I'm proud to be able to make it available to you for free.

In addition to the six calculators, the app gives you instant access to the following MikeHolt.com resources:

Continuing Education | Exam Preparation | Free Stuff | Graphic of the Day | Instructor Resources | Mike Holt Products | Newsletters | Question of the Day | Technical Question Forum | Videos

Here's a highlight of the calculator features:

  • Circuit Calculator. Size a branch circuit or feeder circuit for residential and commercial, single- and three-phase loads. Input the system voltage and the load and it will let you know the protection size, conductor size, equipment grounding conductor size, raceway size, maximum load, and maximum circuit length.
  • Air-Conditioning Circuit Calculator. Size a branch circuit for residential and commercial, single- and three-phase a/c loads. Input the system voltage and a/c load and it will let you know the protection size, conductor size, equipment grounding conductor size, raceway size, and maximum circuit length.
  • Electrical Heating Circuit Calculator. Size a branch circuit for residential and commercial, single- and three-phase heating load loads. Input the system voltage and heat load and it will let you know the protection size, conductor size, equipment grounding conductor size, raceway size, and maximum circuit length.
  • Motor Circuit Calculator. Size a branch circuit for residential and commercial, single- and three-phase motor loads. Input the system voltage and motor load and it will let you know the protection size, conductor size, equipment grounding conductor size, raceway size, and maximum circuit length.
  • Residential Service Calculator. Size the service for a dwelling unit. Input the system voltage and loads and it will let you know the protection size, conductor size, equipment grounding conductor size, and raceway size.
  • Transformer Calculator. Size a primary and secondary conductors and protection for single- and three-phase loads. Input the system voltage and load and it will let you know the protection size, conductor size, equipment grounding conductor size, and raceway size.

To download the iPhone or iPad app click here.

To download the Android app click here.

We'd love to hear from you about this feature and the ways you're using it. Send us your comments and feedback by clicking on "Post a Comment" below. Don't forget to also take advantage of all the other Free Stuff available on our website.

Comments
  • Just down loaded the app; it came in handy right away. Needed to run a long (300ft) 120v circuit; the app worked great.

    Thanks Mike!

    Tim  April 25 2022, 3:39 pm EDT
    Reply to this comment

  • In using the transformer sizing tool, could you add an option for sizing the primary protection at 250% when using both primary and secondary protection? I understand that in some applications, there could be nuisance tripping if sizing the primary too small.

    Travis Arnzen  April 23 2022, 3:55 pm EDT
    Reply to this comment


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