electricaltesting.net

What it is

TestGuy (electricaltesting.net) is a niche knowledge base platform focused on testing, maintenance, and troubleshooting for power distribution systems. Built for field electrical testing technicians, it offers learning resources, practical tools, and a professional community centered on industry standards including NETA (InterNational Electrical Testing Association), NFPA, NEC, and IEEE/IEC, helping technicians master the skills needed to test, evaluate, and verify electrical equipment.

Core Features

The platform's functions are organized into several main sections:

• Toolbox: Covers a large collection of digital test forms (for insulation resistance, transformers, circuit breakers, switchgear, cable VLF/TD testing, and more) and calculators (for Ohm's law, voltage drop, wire sizing, power triangle, MVA, motor parameters, and more). Many of these are marked as Premium features.
• Certification Exam Prep: Over 4,000 practice questions covering electrical safety, maintenance, performance testing, and industry standards, aligned with certifications including ETT, QEMW, CET, and NICET.
• Simulation Tools: A circuit breaker testing simulator and three-phase power system simulation, complete with dynamic phasor diagrams and an oscilloscope, letting users practice high-current testing in a risk-free environment.
• Glossary & Quick Reference: ANSI device numbers, electrical symbols, and terminology dictionaries for transformers, circuit breakers, and relays.
• Community, Webinars & Job Board: A technical discussion forum, free webinars (eligible for CTD continuing education credits), and an industry job board.
• AI Chatbot: An electrical testing-specific GPT assistant exclusively for Pro subscribers.

Pricing

Some articles and basic tools are free (marked as Launch), while advanced modules require a TestGuy Pro subscription. Pricing is very affordable: $11.99/month for monthly billing, $9.99/month billed quarterly, and $8.88/month billed annually, with lifetime updates included as advertised.

Pros & Cons

Pros: Highly niche and specialized content, tools tailored for real on-site work, content aligned with authoritative standards, low cost, and works directly on mobile browsers. Cons: The About page still has placeholder Lorem Ipsum text, which indicates the site is not fully polished; core advanced features are locked behind a paywall; the entire interface is English-only with no Chinese localization; and it is heavily oriented around the North American standards system, so it has limited applicability for regions that use standards outside IEC-based frameworks.

Who It's For

It is an excellent fit for electrical testing technicians and power maintenance engineers based in North America and other English-speaking regions, as well as anyone studying for NETA/CET certification. For power industry practitioners in China, it works well as a reference for English learning and international standards, but users should be mindful of the differences in standards systems.

Access from China

This is a standard technical website, and our test confirmed it can be accessed directly without a proxy.