Trades Exam Prep

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
- How to calculate balanced three-phase apparent power using square root of three times line volts times line amps
- The mathematical relationship between apparent power in volt-amperes and real power in watts using power factor
- A step-by-step 208V and 10A calculation example producing 3603 VA and 2882 W at 0.8 power factor
- Phase-to-line voltage and current relationships in wye and delta configurations alongside neutral current assumptions
- Common exam traps including omitting the square root of three multiplier or incorrectly multiplying line values by three

Prepare for your exam with our independent prep resources and free practice questions at https://open-exam-prep.com/practice/journeyman-electrician and watch video lessons at https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026
https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
https://www.iccsafe.org/certification-exam-catalog/

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
- How to calculate base single-phase current by dividing volt-amperes by line voltage.
- The distinction between volt-amperes as apparent power and watts as real active power.
- Why fixed electric space heating is calculated as a continuous load requiring a 125 percent multiplier.
- Why a 25-ampere overcurrent device under Article 240.6(A) and 10 AWG copper wire satisfy the continuous load requirement.
- How terminal temperature limits under Article 110.14(C) and bundling adjustments differ from physical conduit fill.

This independent study resource offers free practice tools at https://open-exam-prep.com/practice/journeyman-electrician and supplementary video guides at https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026
- https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
- https://www.iccsafe.org/certification-exam-catalog/

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
* Distinguishing separately derived from non-separately derived generator systems based on neutral switching under the 2023 NEC.
* Identifying listing requirements and safety functions of transfer equipment to prevent unintended backfeed.
* Understanding NEC Article 690 for solar photovoltaic arrays, Article 705 for interconnections, and Article 706 for energy storage systems.
* Avoiding common grounding traps related to neutral-to-frame bonds in solid-neutral generator installations.
* Practical decision rules and exam strategies for Journeyman Electrician certification testing.

This independent study resource supplements codebook study and supervised field experience. Practice Journeyman Electrician questions are available at https://open-exam-prep.com/practice/journeyman-electrician and video tutorials can be found at https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026
* https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
* https://www.iccsafe.org/certification-exam-catalog/

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
- How Chapters 5, 6, and 7 of the 2023 NEC modify or supplement general rules where applicable.
- The distinction between Class and Division hazardous location concepts and the Zone system.
- How Article 680 distinguishes equipotential bonding from standard equipment grounding.
- Why specified pool bonding elements require a minimum 8 AWG solid copper conductor.
- A clear decision rule to separate voltage gradient reduction from overcurrent fault clearing.

This podcast provides independent educational study support for journeyman electrician exam prep and is not affiliated with or endorsed by any licensing body. For additional practice questions and study tools, visit https://open-exam-prep.com/practice/journeyman-electrician and https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026
https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
https://www.tdlr.texas.gov/electricians/elecexam.htm

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
- How voltage and current share an inverse relationship in ideal step-down transformers at constant volt-amperes.
- Why a 240V to 120V step-down transformer doubles secondary current at the same volt-ampere rating.
- How to avoid the common trap of sizing secondary conductors based on primary current.
- Standard grounding rules governing system bonding jumpers in separately derived systems under the 2023 NEC.
- Important distinctions between grounded neutral conductors and equipment grounding conductors.

Prepare for your Journeyman Electrician certification with our independent study tools at https://open-exam-prep.com/practice/journeyman-electrician and subscribe to our channel at https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026:
- https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
- https://www.iccsafe.org/certification-exam-catalog/

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
• Why motor overload protection and short-circuit protection require separate calculations under NEC Article 430.
• How starting inrush current differs from continuous running current and sustained mechanical overloads.
• When standard 125% or 115% overload initial sizing rules apply based on motor service factor and temperature rise.
• Why high short-circuit breaker settings never permit undersized branch-circuit conductors.
• How to correctly distinguish NEC Table FLC from nameplate FLA in journeyman electrician exam questions.

Prepare independently for your journeyman electrician licensing exam with free study tools at https://open-exam-prep.com/practice/journeyman-electrician and video tutorials at https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026
- https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
- https://www.iccsafe.org/certification-exam-catalog/

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
- When to use NEC Article 430 full-load current tables versus motor nameplate ratings under the 2023 NEC.
- How section 430.6(A)(1) uses table values to size branch-circuit conductors and short-circuit protection for standard AC motors.
- Why section 430.6(A)(2) requires using motor nameplate full-load current to determine overload protection.
- Specific exceptions where nameplate current governs conductor sizing, such as low-speed or multispeed motors.
- Step-by-step sizing calculation for a 10 HP continuous-duty motor to avoid common exam traps.

This independent study resource is designed for journeyman electrician exam preparation. Practice questions and additional study material are available at https://open-exam-prep.com/practice/journeyman-electrician and video tutorials at https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026
https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
https://www.tdlr.texas.gov/electricians/elecexam.htm

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
• The technical distinction between complete luminaires and individual lampholders under the 2023 NEC.
• Requirements for installing luminaires in wet locations versus damp locations.
• How to calculate general lighting loads using required unit loads rather than actual connected wattage.
• Common calculation traps involving high-efficiency LED lighting in commercial occupancies.
• A practical decision rule for separating feeder load calculations from branch circuit rules.

This independent study resource is designed to help you prepare for journeyman electrician examinations. For additional practice questions and tools, visit https://open-exam-prep.com/practice/journeyman-electrician and subscribe on YouTube at https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026
• National Fire Protection Association (NFPA 70 - 2023 NEC): https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
• ICC National Contractor Certification Catalog: https://www.iccsafe.org/certification-exam-catalog/

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
• How 2023 NEC Section 110.3(B) mandates compliance with equipment listing and labeling instructions.
• General requirements for grounding-type receptacles and device rating rules under Article 406.
• Permitted code options for replacing non-grounding two-prong receptacles on ungrounded branch circuits.
• Why installing a GFCI receptacle on a two-wire circuit provides personnel protection but does not create an equipment grounding path.
• Mandatory marking requirements and additional AFCI or tamper-resistant provisions for replacement receptacles under 2023 NEC 406.4(D).

This episode offers independent educational study support for journeyman electrician exam candidates. Practice questions and video explanations are available at https://open-exam-prep.com/practice/journeyman-electrician and https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026:
• https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
• https://www.iccsafe.org/certification-exam-catalog/
• https://www.tdlr.texas.gov/electricians/elecexam.htm

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
• How National Electrical Code Chapter 9 Table 1 limits raceway fill percentages based on conductor count.
• Why wire insulation types affect total conductor cross-sectional area in Chapter 9 Table 5.
• The distinction between geometric conduit fill limits and electrical ampacity adjustment factors.
• How to apply Note 4 sixty percent fill rules for conduit nipples twenty-four inches or less.
• A step-by-step calculation method for sizing raceways with original practice values.

For additional independent study resources, practice question sets, and video tutorials, visit https://open-exam-prep.com/practice/journeyman-electrician and https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026:
- https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
- https://www.tdlr.texas.gov/electricians/elecexam.htm

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
• Volume allowance values per conductor size according to 2023 NEC Table 314.16(B)
• How to count internal cable clamps and single or multi-gang device yokes
• The 2020 and 2023 NEC equipment grounding conductor volume rule for up to four grounds and additional grounds
• Step-by-step calculation for an exact 32.0625 cubic inch required box volume and why rounding down is prohibited
• Common calculation traps and an easy decision rule for journeyman exam questions

This independent preparation material supplements codebook study and hands-on training. Explore practice tools at https://open-exam-prep.com/practice/journeyman-electrician and https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026
• https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
• https://www.iccsafe.org/certification-exam-catalog/

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
- The distinction between dry, damp, and wet locations under the 2023 NEC
- Why Section 300.5(B) classifies the interior of all underground raceways as wet locations
- How to separate raceway physical protection from conductor insulation moisture ratings
- Why Type NM-B cable is prohibited inside underground conduit and which wet-rated alternatives to select
- Key listing requirements and physical damage considerations when choosing wiring methods

This independent study resource helps learners prepare for journeyman electrician examinations based on the 2023 National Electrical Code. Practice online at https://open-exam-prep.com/practice/journeyman-electrician and follow video tutorials at https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026
- NFPA 70: National Electrical Code (2023 edition), Article 100, Article 300, and Article 310: https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
- Texas Department of Licensing and Regulation (TDLR) Electrician Examinations: https://www.tdlr.texas.gov/electricians/elecexam.htm

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
• Minimum required dwelling unit branch circuits including small-appliance, laundry, and bathroom circuits under the 2023 NEC
• How small-appliance circuit rules prohibit general outlets while allowing specific code exceptions
• The single-bathroom branch circuit exception permitting additional equipment on that individual circuit
• General wall-space receptacle spacing rules, including continuous measurement around corners and floor-line wall breaks
• Receptacle placement calculations along unbroken walls to maintain compliance with the 6-foot floor-line rule

For independent study prep and practice tools, visit https://open-exam-prep.com/practice/journeyman-electrician and https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026
• NFPA 70: National Electrical Code (2023 edition): https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
• ICC Certification Exam Catalog: https://www.iccsafe.org/certification-exam-catalog/

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
* The distinct safety hazards addressed by GFCI personnel shock protection versus AFCI arcing-fire protection.
* Why Class A GFCI devices sense conductor current imbalance across 4 to 6 mA thresholds without needing an equipment grounding conductor.
* How AFCI protection identifies hazardous arcing waveforms without replacing standard overcurrent and overload protection.
* Why code edition and occupancy type must be verified before determining required device locations under the 2023 NEC.
* How to analyze exam scenarios involving dwelling unit requirements, dual-function devices, and common trap choices.

This independent study resource supplements official codebook reference and supervised practical training. For practice tools, visit https://open-exam-prep.com/practice/journeyman-electrician and watch video guides at https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026: https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70 and https://www.iccsafe.org/certification-exam-catalog/

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
* Explain how overloads, short circuits, and ground faults relate to overcurrent under the 2023 NEC.
* Identify standard fuse and circuit-breaker ampere ratings listed in NEC Section 240.6(A).
* Apply the three conditions required to use the next-size-up overcurrent rule in NEC 240.4(B).
* Distinguish feeder conductors from multioutlet branch circuit conductors when applying rounding rules.
* Implement a decision rule to avoid common exam traps when sizing overcurrent protective devices.

This independent study tool helps you prepare for journeyman electrician examinations. For additional resources, visit https://open-exam-prep.com/practice/journeyman-electrician and subscribe to our YouTube channel at https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026
https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
https://www.tdlr.texas.gov/electricians/elecexam.htm

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
• How ambient temperature correction factors adjust allowable conductor ampacity relative to standard table baselines under the 2023 NEC.
• When bundling multiple conductors triggers current-carrying adjustment factors in a raceway.
• Which conductors count toward raceway adjustment totals and why equipment grounds are excluded.
• How neutral conductor qualification rules apply under Section 310.15(E) for linear, non-linear, and multiwire circuits.
• How to avoid common exam traps when calculating adjusted ampacity for non-linear electronic loads.

This independent study guide supports journeyman electrician candidate preparation alongside official codebooks and supervised practical training. Test your skills at https://open-exam-prep.com/practice/journeyman-electrician and subscribe for video walk-throughs at https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026:
- https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
- https://www.tdlr.texas.gov/electricians/elecexam.htm

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
• The distinction between conductor insulation ratings and equipment termination temperature limits under 2023 NEC 110.14(C).
• Default terminal temperature rating rules for circuits rated 100 amperes or less versus circuits over 100 amperes.
• Why 90°C conductor insulation does not automatically permit using 90°C column ampacity for final equipment terminations.
• How to use 90°C insulation ratings as the baseline for ampacity derating when insulation and environment permit.
• A step-by-step scenario solving terminal ampacity for Number 1 AWG THHN copper on a 75°C rated breaker.

This independent educational resource is designed to help learners prepare for journeyman electrician examinations. Practice online at https://open-exam-prep.com/practice/journeyman-electrician and subscribe on YouTube at https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026:
- https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
- https://www.tdlr.texas.gov/electricians/elecexam.htm

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
* How the 2023 NEC Article 100 defines a continuous load based on three hours or more of maximum current operation.
* The basic continuous load calculation formula requiring 125 percent of continuous loads plus 100 percent of noncontinuous loads.
* When listed 100-percent-rated overcurrent assemblies permit sizing conductors at 100 percent of total continuous and noncontinuous loads.
* Why load calculation minimum ampacity must be evaluated separately from physical temperature and bundling adjustment factors.
* How to solve a continuous load scenario and avoid common exam traps involving misapplied multipliers.

For additional independent study resources and practice questions, visit https://open-exam-prep.com/practice/journeyman-electrician and subscribe on YouTube at https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026: https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70 and https://www.iccsafe.org/certification-exam-catalog/ .

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
- How Article 100 of the 2023 NEC defines the operational boundary between feeders and branch circuits.
- The critical role of the final overcurrent protective device in identifying circuit classifications.
- Why physical conductor properties like THHN or wire gauge do not determine circuit role.
- How to analyze a panel-to-subpanel system scenario to correctly classify upstream and downstream conductors.
- A simple decision rule for distinguishing feeders from branch circuits on licensing exams.

For independent journeyman electrician prep resources, visit https://open-exam-prep.com/practice/journeyman-electrician and watch video guides on https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026
https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
https://www.iccsafe.org/certification-exam-catalog/

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:
- Role and location rules for service disconnecting means versus service overcurrent protection
- Qualifying grounding electrodes required to be bonded into a grounding electrode system under 2023 NEC
- Supplemental electrode rules and the twenty-five ohm resistance testing exception
- Key differences between grounding electrode conductors and equipment grounding conductors
- Ground-fault clearing paths versus system earth grounding decision rules

An independent prep resource for electrician candidates. Practice questions are available at https://open-exam-prep.com/practice/journeyman-electrician and video tutorials at https://www.youtube.com/@Open-exam-prep .

Sources checked: September 28, 2026
https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
https://www.iccsafe.org/certification-exam-catalog/