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Extra resources for Black & Decker Wiring Basics
Diagnostic tools for home wiring use include: Touchless circuit tester (A) to safely check wires for current and confirm that circuits are dead; Plug-in tester (B) to check receptacles for correct polarity, grounding and circuit protection; Multimeter (C) to measure AC/DC voltage, AC/DC current, resistance, capacitance, frequency and duty cycle (model shown is an auto-ranging digital multimeter with clamp-on jaws that measure through sheathing and wire insulation). Wiring Safety Safety should be the primary concern of anyone working with electricity.
Electricity is made available through receptacles, switches, and fixtures. Water finally leaves the home through a drain system, which is not pressurized. Similarly, electrical current flows back through neutral wires. The current in neutral wires is not pressurized and is said to be at zero voltage. Water and electricity both flow. The main difference is that you can see water (and touching water isn’t likely to kill you). Like electricity, water enters a fixture under high pressure and exits under low pressure.
Circuit breaker: A safety device that interrupts an electrical circuit in the event of an overload or short circuit. Conductor: Any material that allows electrical current to flow through it. Copper wire is an especially good conductor. Conduit: A metal or plastic pipe used to protect wires. Continuity: An uninterrupted electrical pathway through a circuit or electrical fixture. Current: The movement of electrons along a conductor. Duplex receptacle: A receptacle that provides connections for two plugs.