(e)
Route cables exiting a connector in a straight line for at least 0.25 inches before making a bend. Refer to Figure 2003.
(f)
Route cables with enough slack to prevent mechanical strain on wires, terminals, connections, junctions and supports. Refer to Figure 2003.
SPACER
(g)
When cables cross or are in proximity to seat moving parts, route them on either side of those moving parts.
(h)
Locate the breakout of individual cables adjacent to cable support or clamping points. This minimizes the amplitude of vibration transmitted to the breakout wires from the main harnesses.
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B/E AEROSPACE
COMPONENT MAINTENANCE MANUAL
MILLENNIUM. 88813 SERIES
Figure 2004
(j) Provide service loops to allow for adjustment, service or removal of connectors or components with minimal disassembly. Refer to Figure 2004.
(2) Clearances
(a)
Install cables with enough clearance to prevent chafing against the sharp edges of structure, equipment, etc. (1/8” minimum clearance unless secondary protection is provided).
(b)
When not specifically controlled, the slack portion of the cable bundles may contact smooth flat surfaces and smooth radii of 1/8” or larger of either metal or plastic.
(c)
Route power wiring for motorized equipment, in-seat power, or reading lights separately from IFE and communication wiring. Sensitive signal or communication wiring should have at least a one-inch separation from electrical wiring. When a one-inch separation is not possible, enclose the power wiring in a metallic shield grounded to seat structure to minimize EMI. Refer to Figure 2005.
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B/E AEROSPACE
COMPONENT MAINTENANCE MANUAL
MILLENNIUM. 88813 SERIES
CABLES
CABLE TIE
Figure 2005
(3) Bend Radius
(a)
For coaxial cable, use a minimum bend radius of ten times the cable diameter. In restricted places, the bend radius for coaxial cable may be a minimum of six times the cable diameter. Too severe a bend in coaxial cable can damage the cable and cause loss of signal. For standard wire cable, the bend radius will be a minimum of three times the cable diameter, but six times the cable diameter is preferred.
(b)
The bend radius of a cable bundle will not be less than six times the diameter of the largest cable in the bundle.
(c)
Clamping or the pressure of cable rubbing against structure causes bend sensitivity and reduced cable life. Increase bend radius to maximize cable life.
NOTE: If the cable jacket or sheathing becomes crimped, the bend radius is too small.
(4) Cable Slack
(a)
Distribute slack evenly throughout the length of the cable bundle.
(b)
In applicable areas, ensure there is enough cable slack to allow the following operations:
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