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Inspectors and instructors get Kopperfield for free

Sign up for access to easy and accurate tools to save time reviewing load calcs and single line diagrams.

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Inspectors and instructors
get Kopperfield free

Sign up for access to easy and accurate tools to save time reviewing load calcs and single line diagrams.

Save time with smarter tools

Review docs in one place

Receive load calcs and single line diagrams from students and contractors. Scan a QR code and store all documents in one place.

Confirm load calculations

Save time with our residential load calculator. Quickly and accurately check calculations from students and contractors.

Verify single line diagrams

Review single line diagrams and site plans for any scenario. Provide faster comments on drawings from students and contractors.

The Kopperfield tool helps with load calculations and avoids common mistakes, such as handling an EV charger in a load calc. I refer Kopperfield’s tool to contractors I work with.
Reina M, City Electrical Inspector
Reina M, City Electrical Inspector

Load calculations

Create and check load calcs quickly

Create and confirm load calculations with logic based on Part IV of the NEC (optional method 220.82 & 220.83). Automatically pull property data and create professional PDF reports.

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Single line diagrams

Review site plans and single line diagrams

Save time reviewing projects with easy drawing tools for single line diagrams. Customize a template from our library, update the drawing, and generate a shareable PDF.

100% free for inspectors and instructors
Unlimited load calcs
Document sharing
Custom default values
Branded templates

Library of all completed calculations

Library of all completed calculations

AI-powered panel photo
processing

AI-powered panel photo processing

Load calculator demo

Hear it from a pro

See how Kevin from Bella Electric San Diego uses Kopperfield design tools to save time and prepare for inspections.

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