[Journeyman] 17. Box Fill: Counting Conductors, Devices and Grounds

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/