Solid and Stranded Wire

used for household wiring. Number 4 wire is often used for car battery “boosts cables. the AWe sizes for common types of wiring.

SAFETY WARNING

In the following testing procedures, we’re assuming that you will be tes: for continuity of wires used in telephone lines, speakers, audio cables, televis ” cables, outdoor low-voltage lighting, control wires for sprinkler valves, ~ security systems -low-voltage wiring. In this chapter we are not discussing tes: ” continuity for high-voltage household wiring.                Whenever testing any wires for continuity, make certain that the device -
with the wires is unplugged from household wiring so that no electrical vo ” exists on the wires. Also, be very carefu I in testing wires that are strung throug a house or outside of a house. The wires should not come in contact high-voltage household or exterior wiring. High-voltage electricity can KilL.

Continuity of Wires
Wires break when they are twisted around nails, subjected to cc bending, or just have normal use over a long period of time. Norrnal!x wire has a resistance of 1 to 100 ohms per 1000 feet, depending L = diameter and type of wire. This is virtually a “dead short”. When wire’ continuous, or “open”, their resistance is the resistance of air.