To allow replacement of terminals at least
Never support any wire or wire bundle from
twice
a plumbing line carrying flammable fluids or
oxygen. Use clamps on these lines only to ensure
To prevent mechanical strain on the wires,
separation of the wire bundle from the plumbing
cables, junctions, and supports
line. Whenever possible, route wires and bundles
parallel with or at right angles to the stringers or
To permit free movement of shock and
ribs of the area involved. See figure 2-22.
vibration mounted equipment
To permit shifting of installed equipment
Don't install single wires or wire bundles with
for purposes of maintenance
excessive slack. Slack between support points,
such as cable clamps, should not normally exceed
CONDUIT AND FITTINGS
one-half inch. (This is the maximum you should
be able to deflect the wire with moderate hand
In many aircraft, the use of conduit is limited.
force.) You may exceed this slack if the wire
This is a good practice because it saves weight and
bundle is thin and the clamps are far apart. The
ensures wide separation of cables. The separation
slack must never be so large that the wire bundle
of the electrical system makes it less vulnerable
can touch any surface. Allow a sufficient amount
to gunfire. However, some current aircraft,
of slack near each end for the following reasons:
especially those with limited space for wire
Z permit ease of maintenance
routing, use conduit.
To
Figure 2-22.-Routing cables.
