Dc Power Cable And Main Fuse Holder Installation - Harris M7300 Installation And Product Safety Manual

control head's DC Power Cable must be connected to unswitched and fused vehicle power. The
required fuse rating is 3 amperes.
In all of the above cases, both the radio's main DC power input (red wire) and the control head's main
DC power input (also a red wire) must each be connected through an in-line fuse to unswitched vehicle
DC power. The red wire of the radio's DC Power Cable must be connected to raw battery power (positive
battery terminal) via the supplied fuse. Likewise, the red wire of the control head's DC Power Cable must
also be connected to unswitched vehicle DC power via another supplied fuse. The white ignition wire of
the radio's DC Power Cable is only used for the data-only radio (i.e., no control head), and it is the only
means for turning its power on in the data-only radio installation.
Any DC input power provided to the radio shall be no higher or lower than
13.6 volts DC 10%. The DC input power should be free and clear of any AC noise or
DC spikes above 18 volts. If the vehicle cannot meet these requirements, then DC
conditioning will be required before any DC is connected to the radio. This includes
conditioning for both the radio's main DC power input lead and for its switched ignition
sense power input. DC conditioning can be accomplished by a noise filter or DC
CAUTION
isolation equipment such as Harris part number FL-018314-001 or FL-018314-002, or
similar units equal specifications. Fusing must be placed in-line before any noise filter.
Contact TAC for additional information.
8.2.2

DC Power Cable and Main Fuse Holder Installation

The radio's DC Power Cable has a 3-pin connector, a 20-foot red wire (for the main power connection), a
20-foot white wire (only connected in a data-only radio installation), and a 4-foot black wire (for the
ground connection). It is supplied with waterproof fuse holders, two AGC-type fuses, and non-insulated
ring terminals. The following installation procedures are recommended:
8.2.2.1 Black Wire Connection (Ground Wire)
1. Connect the radio's DC Power Cable to the radio by mating its 3-pin connector to the radio's 3-pin
power cable connector as follows: Visually align the key and firmly push and turn the outer locking
ring clockwise until it stops. A click will be sensed to confirm proper mating.
Do not confuse the radio's DC Power Cable which has a 10-AWG red wire with the
control head's DC Power Cable which has a 12-AWG red wire. The radio requires
much more DC operating current than the control head. Therefore, it requires the
larger wire size of 10-AWG. The part number of the radio's DC Power Cable is
CAUTION
CA-012365-001.
2. Prepare to connect the cable's black wire to vehicle ground by locating an area of vehicle metal
within approximately two (2) feet of the radio. This surface must have a solid and stable connection
to vehicle ground. If not, add grounding strap(s) as necessary.
3. Strip the area of any paint or dirt to expose a bare metal surface, approximately ¾-inch square.
4. Drill a hole in the approximate center of the bare metal surface, and deburr it. A ⅜-inch non-
insulated ring terminal is supplied with the cable to make this ground connection. Therefore, hole
diameter should be appropriate for the utilized grounding screw/bolt size and type used to connect the
ring terminal to the bare metal surface. This hardware is not supplied.
MM-014763-001, Rev. E
49