iPhone Screenshots


Circuit Wizard is designed to help electricians and enthusiasts determine wire sizing for a given installation based upon specific parameters using ABYC and Blue Sea Systems specifications.

Once a wire size is known you can then use that information to search for products offered by Blue Sea Systems in order to protect your circuit.

Based upon the popular web application located at http://cw.bluesea.com/, this version is designed to be run completely offline which should be useful in situations where an internet connected computer is not available.

What’s New

Version 1.3

• Ancor wire recommendations added
• Various bug fixes

Ratings and Reviews

4.0 out of 5
4 Ratings

4 Ratings

BNG333 ,

Great app!

This is a great app! It lets you enter your specs and then lets you know what size wire to use safely. I have searched for other wire size tables on the net, but none are as good as this one in my opinion.

mkodama ,

Great for Automotive Wiring Too!

Very quick and easy way to select appropriate wire size based on voltage drop or wire ampacity.

I really wish the app had an option for 150°C wire insulation, as what's pretty commonly used in motorsports and aircraft; there is a large jump from 125°C to 200°C. In general, just allowing for a custom value for more of the settings would be an improvement. Also, for the duration field, you can just type off the screen as there is no character limit.

Boat-bum10 ,

Valuable for all marine electrical professionals

I have not yet compared this to the abyc tables but so far it sounds right and the additional options for wire bundling etc is a great reminder to keep thermal considerations in mind. A great app and another example of Blue Seas commitment to building a safe reliable and enjoyable boating and yachting experience


Blue Sea Systems, Inc.
4.4 MB

Requires iOS 7.1 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© 2012 Blue Sea Systems


  • Family Sharing

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

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