Page 220 - Electromechanical Devices and Components Illustrated Sourcebook

182 Electromechanical Devices & Components Illustrated Sourcebook

Cable Clamps and Strain Reliefs
Wire Terminals
Fixing a cable to a cabinet is critical to the long-term opera-
tion of any circuit. The movement of a loose cable can fray
the conductors or damage the components to which it is
connected.
Figure 10-44 shows typical collet style cable clamp. A
Potting Compound cable is placed through the center of the clamp and a threaded
cap is tightened down. As the cap is tightened a collet is com-
pressed around the outside diameter (OD) of the cable, clamp-
Case ing it firmly. These units are available in a wide variety of
styles and materials that are suitable for almost any situation.

Components
Threaded Cap
Figure 10-42 Lead Wire Construction
Load Washer

Collet
Point-to-Point Construction

Body
Industrial controls, in particular, are generally constructed
using the point-to-point method. In this case major compo-
nents are mounted to a base or chassis and interconnected
Seal Washer
with wire to secondary components. Almost any industrial
control cabinet is assembled using this method and can easily
Mount Nut
be inspected by simply opening the front panel. Figure 10-43
shows a small control panel using point-to-point wiring. Figure 10-44 Typical Cable Clamp

2.5
2.0 1.5 3.0 3.5
Relays 1.0 4.0 10 Amp DC 10 Amp DC
.5 4.5 120 VAC Coil 120 VAC Coil
0 5.0
Seconds
Operator
Controls
Enclosure
115/120 VAC

240/480 VAC
Control
Transformer
Inputs

MOTOR
STARTER RESET
120 VAC COIL
Power
Output

Figure 10-43 Industrial Control Construction