What is the ICC E2 Commercial Electrical Inspector exam?

The ICC E2 exam tests your knowledge of the National Electrical Code (NEC) as it applies to commercial electrical installations. Topics include wiring methods, overcurrent protection, grounding, service equipment, special occupancy requirements, and many more topics in this robust 55-hour online course.

What code book do I need for the ICC E2 exam?

The exam references the National Electrical Code (NEC/NFPA 70). It is an open-book exam, so you can bring your code book after learning how to use it. SI Certs training teaches you where critical answers are located so you can navigate the NEC efficiently under time pressure.

How long should I study for the ICC E2 exam?

Most students spend 6–10 weeks preparing with 1–2 hours of study per day. Those with a strong electrical background may need less time. SI Certs is fully self-paced so you can move at your own speed.

What's included in the SI Certs Commercial Electrical course?

Your enrollment includes 55 hours of online instruction including visual/graphical teaching elements, audio playback throughout, targeted practice questions, expert 1-1 coaching available through the site, and a pass-support guarantee on the testable NEC topics at $449.

Can I bundle this with the other commercial inspector courses?

Yes — the ICC C5 Combination package includes Building, Mechanical, Electrical, and Plumbing courses at $1,499. You save compared to buying all four courses individually.

ICC Commercial Electrical Inspector
Online Training Course

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✓ 90%+ Pass Rate✓ Pass-Support Guarantee✓ 1-to-1 Expert Coaching✓ 10,000+ Inspectors Certified

Certification
E2 Commercial Electrical Inspector through ICC (International Code Council)
Prerequisites
None
Requirements
None
Course Length
55 Hours Online Training
Required References
View Required References
Relevant Industries
All Commercial Construction
Public/Private Projects
County/City Building Departments
Code Inspection

Preferred

Education

Provider

Commercial Electrical

55 Hours

5.5 CEUs/PDHs

Personal Coaching

Aleksandar Rankovic, PE, MSEE

Commercial Electrical Course Developer

I designed this commercial electrical course to make the NEC accessible to inspectors at every level. Complex electrical concepts are broken down with clear visuals and practical examples.
My engineering background helps me explain the 'why' behind each code requirement — so you're not just memorizing, you're understanding.
I coach students personally through the tough spots. Take a look at some real conversations to see how I help students work through the material.

Real Coaching Conversations

Here's what 1-to-1 coaching looks like with our students

Overcurrent devices

I have a question on NEC module 6 regarding overcurrent devices. Under the title Protection of conductors the module states Overcurrent device rating should not be more than the rating of the conductor(20Amp); but later in Standard rating under Illustration 6Y example 1 tells to use a overcurrent device i.e. circuit breaker of 400Amp, but again reverts back to previous statement in example 2. What is the logic behind this?

As stated in the paragraph below the title Protection of Conductors:

“The NEC recognizes several situations where the conductor overcurrent protection can be sized differently. Those are listed in Section 240.4(A)-(G). We will mention just two of these – overcurrent devices rated at 800A or less, and overcurrent devices rated over 800A.”

Section 240.4(B) is used In Example 1 below Illustration 6Y to explain how 240.4(B) is applied.

The 20A rated conductor cannot be protected with a 30A OCPD as 20A is already the standard rating. However, 380A rated conductor is permitted to be protected by a 400A OCPD as 400A is the next standard OCPD rating (see Table 240.6(A)). If we had, let’s say, an 18A rated conductor, the NEC would let us protect it with a 20A rated OCPD.

Conductors that are not permitted to be installed in parallel

I need help with this question.

The question is: "Which of the following conductors are not permitted to be installed in parallel?"

Answer 1: 4 AWG THHN copper conductors Answer 2: 4/0 AWG XHHW-2 copper conductors Answer 3: 1/0 AWG THHN aluminum conductors Answer 4: 200 kcmil THWN-2 aluminum conductors

The correct answer is: Answer 1.

My answer was: Answer 2.

the problem I seem to have with sizes is remembering which direction the sizes go is there any recommendations to either put into my book or help that information sink in. Thanks Teresa

Teresa,

The best way, in my opinion, is to look at Table 310.15(B)(16) where the wires are listed from smallest (18 AWG copper, 12 AWG aluminum) to largest (2000 KCM for copper and aluminum).

Ampacities adjustment

Hi I have a question in Electrical course module 8 here, ampacities adjustment

By using 310.15(B)(16) and 310.15(B)(2)(a) to determine the allowable ampacities, I basically know how to use these 2 tables together.

The only confusion I have is when I should use the 90 degree temperature rating of conductor to search the allowable amacities? When I should use the 75 degree or 60 degree? It looks to me everytime I do the ambient temerature correction I should use the 90 degree, but I still doubt that, so I want to confirm. Thank you!

You are right - when you apply any of the correction factors (due to the ambient temperature, number of current carrying conductors in the same raceway, or due to the voltage drop), you can use the 90°C temperature column as per 110.14(C) “...Conductors with temperature ratings higher than specified for terminations shall be permitted to be used for ampacity adjustment, correction, or both.“

Thank you so much Aleksandar!

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Full Course Includes

Training Hours

55 Hours

CEU / PDH

5.5 Units

120 Day Course Access

Visual Online Curriculum

Flashcard Review System

Personal Coaching Passing Guarantee

Targeted Quizzes & Practice Tests

Insightful Audio Instruction

Photos, Graphics, & Illustrations

Study anywhere — works on all your devices

User Reviews

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Pleasant experience

Hi Gabe, I want to inform you that I passed the Commercial Electrical exam yesterday. Attached is my certificate. I want to thank you for the course and the guidance. It has been really a pleasant experience for me.

Thanks again.

S. Khan

Riyadh, Saudi Arabia

“

Passed

I completed my Commercial Electrical Inspector course. I also passed the ICC Test.

Randy D.

San Diego, CA

“

Extremely helpful tool

I found the SI Certs Program an extremely helpful tool in obtaining my ICC B2 Commercial Building Inspector Certification. Completing the coursework and practice exams gave me the confidence I needed to pass this difficult exam.

Chris E.

Upland, CA

“

E2 is DONE

Hey guys, I passed my E2 last week. On to B2 now!!

Aram B.

Glendale, CA

“

Their customer support is unbelievable!

This app is perfect and their customer support is unbelievable! All I had to do was follow the class, step by step, and I passed all 3 tests (first try) to become a reinforced concrete inspector. I was extremely nervous about the plans-reading test, but I passed that as well.

I was especially impressed with how helpful these guys are when I had questions. They always respond within a day or two and answer all my questions, even after my paid class had ended. I am now taking their masonry class and so far it is equally impressive. I highly recommend these classes.

David W.

Saint George, UT

“

Seriously, the best customer service I have EVER experienced

Take the courses!

If you're someone who can study on their own but would like some structure, any SI Certs course is for you. I have purchased all 3 CWI courses and the reinforced concrete course from SI Certs and have passed both the CWI and reinforced concrete exams the first time around. I plan to take another course with SI Certs (PT or masonry) because of the success rate.

P.S. Shout out to Gabe and the SI Certs team. Seriously, the best customer service I have EVER experienced.

Alonzo M.

San Jose, CA

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Pricing Options

COMMERCIAL ELECTRICAL

120-Day Access

55 Hours

$449

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Best Value

ICC COMMERCIAL COMBINATION INSPECTOR

Commercial Building
Commercial Mechanical
Commercial Electrical
Commercial Plumbing

1+ Year Access · 185 Hours

$1,499

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*Our course does not include the required books. You can purchase the books directly from ICC, or from Amazon or eBay.

Secure CheckoutFlexible PaymentsPass-Support Guarantee90%+ Pass Rate

Required Reference

You'll need the following reference for your exam. The test is open-book — purchase your reference early so you can study with it.

NEC 2020 & Tab Combo

NFPA 70: National Electrical Code (NEC) & Tab Combo

Purchase Reference →

References are not included with the course. Purchase from the links above, Amazon, or eBay.

Course Breakdown

Commercial Electrical Inspection Code Test

55 hours of training | 120 days access

Course Features

NEC Scope & Navigation
Conductors
Service
Branch Circuits
Feeder Requirements
Wiring Methods
Distribution Systems
Raceways
General Use Equipment
Motors and Controllers
Special Occupancies
Special Equipment
Special Systems
Low Voltage Systems
Test-Taking Preparation
Simulated Timed Tests

Topics

Electrical Terminology
Use, Insulations, Markings
Grounding & Bonding
Calculations, Ratings
Equipment Grounding & Bonding
Boxes, Enclosures, Conduit
Panelboards & Switchboards
Cables & Bus Ducts
Switches, Receptacles & Light Fixtures
Transformers & Generators
Health Care & Other Facilities
Swimming Pools, Fountains
Emergency Systems
Fire Alarm, Signaling & Communications
PRONTO Testing
Testing Strategies

Study Tip

The test is a single, multiple-choice test. The ICC exam code is E2 and the test covers the NFPA 70: National Electrical Code. You will have 210 minutes to complete 80 code questions. The test is open-book.

Course Credits - Complete Flexibility on Purchases

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Frequently Asked Questions

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ICC Commercial Electrical

✓ 90%+ Pass Rate✓ Pass-Support Guarantee

Start Learning Today$449

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ICC Commercial Electrical Inspector Online Training Course

Personal Coaching

Real Coaching Conversations

Full Course Includes

User Reviews

Pricing Options

COMMERCIAL ELECTRICAL

ICC COMMERCIAL COMBINATION INSPECTOR

Required Reference

Course Breakdown

Commercial Electrical Inspection Code Test

Course Features

Topics

Course Credits - Complete Flexibility on Purchases

Single Course

2 Credits

3 Credits

4 Credits

5 Credits

Frequently Asked Questions

Ready to Start Your Certification?

ICC Commercial Electrical Inspector
Online Training Course