The Kopperfield Inspector Program is free for qualified inspectors. Apply for access

The Kopperfield Inspector Program

The Kopperfield Inspector Program gives verified inspectors free, unlimited access to Kopperfield. Create and verify load calculations in seconds, review submissions from any device, and help contractors deliver better quality load calcs.

Apply for free access→

✓ No billing information required. Verified & approved within 1 business day.

Electrical inspector reviewing permit paperwork at his desk

Get Verified by Kopperfield

How this works

Get free access to Kopperfield tools

Sign up, submit your inspector ID, and we'll verify your account, usually within one business day. The program is free for full-time professional inspectors and AHJs approved by Kopperfield. Every participant is listed in our inspector directory, helping contractors identify the jurisdictions where Kopperfield tools are recognized.

Get verified in 3 steps

Create your account

Submit your inspector ID

Upload a photo of your inspector credential.

Get verified within 1 business day

No credit card or trial. Full access from day one.

Apply for free access→

What you get with free access

Unlimited load calculations & diagrams

Give anyone free 7-day access to create & verify load calcs

Document sharing

Review past load calculations from any device

Turn a panel photo into a load calc with AI

Access on mobile, desktop or tablet

Trusted by electrical professionals in all 50 states

Join a growing community of thousands of inspectors connected to Kopperfield with new jurisdictions adopting every week. Save time and get better submissions from contractors with Kopperfield tools in your pocket.

Create load calcs

Snap a photo of the panel and Kopperfield runs the NEC load calc. Confirm a pass or fail without redoing the math by hand.

Review load calcs

Receive load calcs and single line diagrams from contractors and keep every document organized in one place.

Help contractors get it right

Share 7-day trial Kopperfield access with your contractors to help them create faster, more accurate load calculations.

Right from your phone

Turn a panel photo into a load calc

Arguing back and forth with a contractor about load calcs? Snap a photo and Kopperfield starts an NEC-based load calc so you can finish it in seconds. Easily export a PDF to share with the customer or contractor.

Load calculations

Create and check load calcs quickly

Create and verify NEC-compliant load calculations using Standard and Optional Methods from NEC 220.82 and 220.83 (2026). Automatically pull property data, document calculation logic, and generate professional PDF reports.

Share access to Kopperfield

Give unlimited 7-day trials to your contractors

Tired of reviewing the same load calc issues? Provide contractors with free 7-day trials to Kopperfield so they can prepare consistent, permit-ready load calcs before submission, helping reduce review time and minimizing corrections.

Who qualifies for this program

For full-time professional inspectors and AHJs

Electrical inspectors

Active municipal, state, or third-party full-time electrical inspectors holding a current license or certification.

Authorities Having Jurisdiction (AHJs)

AHJs and officials responsible for reviewing and approving electrical permits in an official capacity within their jurisdiction.

“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

Trusted by 2,000+ electrical shops, inspectors, and AHJs in the U.S.

Inspectors and AHJs across the U.S. use Kopperfield to review submissions faster.

2 min

average review

to verify a residential load calc

24 hr

approval window

to get verified for Kopperfield

100%

free access

for verified inspectors

FAQ

Common questions

Got more questions? Ask in the application form and we'll get back to you.

What is the Kopperfield Inspector Program?

It gives electrical inspectors and AHJs free access to the same Kopperfield tools contractors use for NEC load calculations, so reviewing permit submissions is faster. Verified participants get unlimited use at no cost.

Who qualifies for the program?

The program is open to active electrical inspectors and authorities having jurisdiction (AHJs). Every application is credential-checked, so the directory stays limited to verified, full-time professionals.

Is Kopperfield really free for inspectors?

Yes. Verified inspectors get free, unlimited access with no credit card, no trial period, and no usage caps. Full access starts the day you're approved.

What counts as proof of inspector status?

Any of the following works: a state or municipal electrical inspector license, an ICC electrical inspector certification, an AHJ-issued employee ID or badge, or a letter from your jurisdiction confirming active status. A clear photo or scan is all we need.

What is the inspector directory?

Participants are listed in Kopperfield's directory of inspectors familiar with our tools, which helps contractors identify jurisdictions where Kopperfield submissions are accepted and understood. Listings include name and jurisdiction, and you can request removal at any time.

Can I share Kopperfield with contractors I work with?

Yes. You can give the contractors you work with unlimited 7-day trials so they can test the load calc tool in the field and fit it into their workflow.

Are there any obligations in return?

No. You're never required to endorse or recommend Kopperfield, and there's no payment or compensation for referrals. Access is provided free of charge as a professional courtesy to inspectors, with the simple aim of being a genuinely helpful tool in your day-to-day work.