Raymarine RAY 210VHF - Manual (Page 21)

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2.4.1 DC Power and External Speaker Connections
The 6 foot long power cable assembly consists of the DC power and the external
speaker cable. The DC power cable is composed of RED (+) and BLACK (-)
wires, and the external speaker cable has YELLOW (+) and GREEN (-) wires.
The RED (+) wire with an in-line fuse (10 amps.) and the BLACK (-) wire of
the 4 pin connector cable are used for connecting the RAY210 to the ship's 12
VDC power system. (refer to fig 2-4)
Fig 2-4 POWER / EXTERNAL SPEAKER CABLE AND 4PIN CONNECTOR
CABLE
In most cases this length should be adequate enough to reach the DC power
source. If additional wire length is required, the cable can be extended by adding
more cable as necessary. However, for power cable runs longer than 15 feet,
larger wire diameter size should be used to prevent voltage line loss. Fig 2-5
provides recommended wire sizes to use for various cable run distance.
Fig 2-5 POWER CABLE LENGTH
Your RAY210 radio should be connected to the nearest primary source of ship's
DC power. A typical source may be a circuit breaker on the power panel or a
fuse block near the unit. When connecting to either of these sources, the circuit
breaker or other in-line fuse should be rated at 10 amps.