Garmin 011-01257-00 Installation Manual - Page 20

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2.4

Cabling & Wiring

Use AWG #24 or larger wire for all connections unless otherwise specified by the aircraft manufacturer

or Garmin. The standard pin contacts supplied in the connector kit are compatible with up to AWG #22

wire. In cases where some installations have more than one unit sharing a common circuit breaker, sizing

and wire gauge is based on aircraft circuit breaker layout, length of wiring, current draw of units, and

internal unit protection characteristics. Do not attempt to combine more than one unit on the same circuit

breaker unless it is specified on aircraft manufacturer approved drawings.

In some cases, a larger gauge wire such as AWG #16, #18, or #20 may be needed for power connections.

The provided connector kit supplies extended barrel contacts for AWG #16 and #18 wire, if required.

Special thin-wall heat shrink tubing is also provided to insulate the extended barrels inside the backshell.

If using #16 or #18 barrel contacts, ensure that no two contacts are mounted directly adjacent to each

other. This minimizes the risk of contacts touching and shorting to adjacent pins and to ground.

Ensure that routing of the wiring does not come in contact with sources of heat, RF or EMI interference.

Check that there is ample space for the cabling and mating connectors. Avoid sharp bends in cabling and

routing near aircraft control cables.

2.5

The GMA 1347D does not have provisions for attaching cooling air and does not generate an excessive

amount of heat during typical operations, however the thermal characteristics of the installation should

always be assessed. An undesirable thermal condition could be created due to the unit's own internal

power dissipation combined with restricted ventilation, or due to heat generated by adjacent equipment.

Limiting thermal build up, by means of fan or natural convection is always a good practice and

recommended to increase the product life. Refer to the G1000 System Installation manual, Garmin part

number 190-00303-00, for information on cooling requirements.

Page 2-4

Revision C

GMA 1347D Installation Manual

190-00303-21