Page 212 - Electromechanical Devices and Components Illustrated Sourcebook

174 Electromechanical Devices & Components Illustrated Sourcebook

Wire Braid Welding cable requires high flexibility and high current-
carrying capacity. These cables are generally made with hun-
dreds of fine wires in a central bundle. The bundle is jacketed
with a silicone liner, which is covered with an oil resistant
rubber jacket. This method of construction produces a cable
Foil Tape that is quite flexible while providing a rugged assembly that
will stand up well to tough environments. Figure 10-14 shows
a typical welding cable.

Ground Wire
Foil Wrap
Oil Resistant
Rubber Jacket
Silicone Liner
Ground Wire High Count
Fine Wire
Figure 10-11 Shield Types
Conductor

Coaxial cable is a type of conductor that is specifically
Figure 10-14 Welding Cable
designed for RF signals. These signals are particularly sus-
ceptible to noise and must be shielded at all times. A coaxial
cable has a single center conductor surrounded by a thick
insulator. The insulator is jacketed with a braided wire shield.
Figure 10-12 shows a typical coaxial cable. Extension Cords

Most of us have had experiences with extension cords. We use
them throughout our houses, offices, and shops. Life with our
Braided Wire Shield
Insulator various appliances would be very difficult without extension
cords.
Conductor Figure 10-15 shows a few of the more common extension
cords for AC service. These types of cords are readily available
Outer Jacket
in a variety of lengths, gauges, and voltages. Two conductor
Figure 10-12 Coaxial Cable cords used for 120-VAC service are normally used for lamps,
small appliances, and double insulated equipment. The
grounded 120-VAC is the most common and is universally

High-voltage wire is generally constructed in a coaxial
configuration, as shown in Figure 10-13. A piece of test lead
is embedded into a thick silicone insulating core. The silicone
insulator is jacketed with a fine braid shield and the braid is
covered with a soft rubber jacket. The shield is grounded to
provide protection in the event that the silicone insulation
fails. The silicon insulation, fine shield braid, and soft rubber
jacket are selected to maximize flexibility of the finished
cable.
Twist-Lock

120 VAC
Soft Rubber Jacket
Fine Braid Wire Shield 240 VAC
Silicone Insulation
Test Lead

Conductor
120 VAC W/O Ground
Figure 10-13 High Flexibility High Voltage Wire Figure 10-15 AC Extension Cords