Book updated May 2026. The focus of low voltage exam is on power limited systems such as fiber optic, voice, data, cable TV and satellite...etc. In Alaska, Article 7 states that a license is required for those who need to install low-voltage controls of max 48 volts. We create these self-practice test questions referencing NEC established technical standards (as well as a little bit of state specific licensing /OSHA requirements) currently valid in the trade. Each question comes with an answer and a short explanation which aids you in seeking further low voltage related technical information.This product focuses on the technical aspect of low voltage works, and you should use this product together with other study resources for the best possible exam prep coverage.