Showing 1–20 of 1,000 ranked alternatives.
Alan Cave
Access code sections and requirements
Access NEC code sections for electrical installations. Search by topic or keyword. View diagrams and tables. Save and annotate code excerpts. Share references via email or messaging.
PawEng, LLC
Answer daily questions and track your progress
Test knowledge of codes with daily quiz questions. Answer individual questions or complete as many as possible in one session. Includes 366 basic electrician-written questions for apprentices, journeymen, and masters.
Southwire Company
Calculate and wire size
Calculate for a specific conductor run or determine wire size based on and current carrying capacity. Limits wire size to and NEC ampacity. Supports AWG and KCMIL sizes only.
Informed Publishing
Access code tables and track updates
Access code updates for 2023 NEC and NEMA standards. View table changes, formulas, and conduit bending guides with video tutorials. Calculate ampacity and conduit fill. Include transformer data and wiring configurations.
Thanh Hung
Tests
Exam questions organized by topic and subtopic. Review explanations for correct answers. Track progress over time. Set study goals and receive feedback on performance. Access updated content reflecting current standards.
FastField, Inc.
Create, edit, and submit on the go
Create and manage custom and database apps without technical expertise. Collect data in real-time via smartphones and tablets. Deploy to a workforce and access through a account.
Autodesk
Design 3D models, circuits, and code
Create 3D models using intuitive device-optimized controls. Design circuits, code, and simulate electronic components. Learn through hands-on projects. Access free, ad-free tools suitable for all ages.
Harrison Holzhauer
Track games, systems, and accessories
Track games, systems, accessories, guides, and amiibo across 100+ platforms. Manage collections with a community-driven database. View item values, compare prices, and make trades. Set reminders and organize inventory by category.
Cyberprodigy LLC
Wire diagrams, pinouts, calculate electricity
Access electrical wiring diagrams for switches, fans, and outlets. Calculate grounding conductor sizes. View diagrams for 3-way switches, 4-way switching, GFCI, and more. Includes NEC 2014 to NEC 2023 standards.
Calculated Industries, Inc.
Calculate and document electrical work safely
Perform electrical calculations for contractors, designers, and electricians. Calculate load, voltage drop, conduit fill, and panel sizing. Verify compliance with NEC® codes from 1996 to 2023. Store and retrieve past calculations.
Nilu Rathod
Practice exams and review materials
Prepare for the exam with practice tests covering electrical theory, NEC, and local codes. Answer multiple-choice questions, review explanations, and track progress. Access study materials and simulate exam conditions for effective preparation.
SkillCat Inc
Earn credentials on your phone
Learn EPA 608 and 609 certification courses, OSHA-10 training, and trade school curriculum on mobile. Earn certifications and diplomas through interactive lessons. Track progress and complete exams remotely.
Webrich Software Limited
Study NEC codes and prepare for exams
Study for NEC certification exams with practice tests, code references, and updates on 2023 NEC Code and 2024 changes. Track progress, review key concepts, and prepare for exams including F16, F17, G17, T17, and residential tests.
Copeland LP
Access product specs and details anytime
Access product specifications for air conditioning and refrigeration equipment. Search by model number, view detailed technical data, and download documentation. Login with existing OPI credentials or create a new account.
PawEng, LLC
Access electrical codes and standards
Access electrical codes and standards for residential, commercial, and industrial applications. Search for wiring diagrams, safety protocols, and equipment specifications. View detailed explanations of electrical systems and components.
784767 Alberta Inc.
Look up hazard info instantly
Access hazardous material data including NIOSH, CFR/HMT, NFPA, GHS, and CAMEO information. Search, sort, and filter materials by properties or response guidelines. View emergency response guides and safety regulations for handling and storage.
Leviton Manufacturing Co. Inc.
Search codes, view standards, track updates
Reference provides NEC compliance information. Search by market vertical, product number, or article number. Review from three perspectives. Identify and access data for electrical professionals.
Cyberprodigy LLC
Calculate loads and circuits
Calculate loads, voltage drops, and conductor sizes according to NEC codes. Verify compliance for residential and commercial projects. Access code references for 2002–2023 editions. Perform wire sizing, panel scheduling, and circuit calculations.
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