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Solenoid Types & Circuits

SOLENOID TYPES AND CIRCUITS
Both ends of the coil in this unit
are insulated. A separate ground
must be connected and this type
of solenoid can be mounted on any
surface.
This type of solenoid is normally
used for starting motors. Since
conventional ignition coils operate on
7 volts, the relay terminal supplies
12 volts to the ignition coil during
starting for easier starts. The base of
this solenoid must be grounded.
SOLENOIDS EQUIPPED
WITH RELAY TERMINAL
INSULATED BASE
SOLENOIDS
GROUNDED BASE
SOLENOIDS
One end of the coil is grounded
to the mounting base. This type
solenoid must mount on a
grounded surface or a ground must
be attached to the base.
Many of the remote mount solenoids look identical on the outside.
However, they can be very different on the inside. Beside the different internal circuits, these can be rated for continuous duty or
intermittent duty use.
Continuous duty solenoids are wound with very fine wire and draw very little amperage. The contacts in continuous duty solenoids
will usually have a lower amperage rating than that of the intermittent duty type. These are normally used as tilt trim relays. This
type of solenoid can also be used for a variety of applications where a remote relay is needed to power a motor or other device.
Intermittent duty solenoids are wound with much heavier wire and draw more amperage. The contacts have a very high amperage
rating. If these stay energized for extended periods of time they heat up and eventually burn out the coil inside the solenoid. This
type of solenoid is normally used as a starter motor relay.
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