of the case. Clockwise rotation indicates a correct phase
phase relationship between your ship and shore power.
sequence. You can stop the motor by releasing the
An approved type of phase-sequence indicator (fig.
2-25) has a miniature, three-phase induction motor and
momentary contact switch.
three leads with insulated clips attached to the ends. The
leads are labeled A, B, and C. The miniature motor can
Stuffing tubes (fig. 2-26) are used to provide for the
be started through a momentary contact switch. This
entry of electrical cable into splashproof, spraytight,
switch is mounted in the insulated case with a switch
submersible, and explosion proof equipment enclosures.
button protruding out the front of the case to close the
Cable clamps, commonly called box connectors (fig.
switch. When the motor starts turning, you can tell its
2-27), may be used for cable entry into all other types
direction of rotation through the three ports on the front
Figure 2-27.--Cable clamps.