How to Tell if Your DMM is Hi-Z or Lo-Z (and Why It Matters in the Field) Most digital multimeters used by electricians are high impedance (Hi-Z). That’s great for accuracy, but it can display phantom/induced voltage on floating conductors …
Phantom, Backfed & Induced Voltage — Field Testing for NFPA 70E Compliance When verifying absence of voltage to establish an electrically safe work condition, electricians often encounter unexpected voltage readings on conductors believed to be deenergized. This guide explains phantom …