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AC 43.13-1B CHG 1 9/27/01 wiring must be clearly identified and must be routed and clamped so that it cannot be mis- matched. j. Connectors in unpressurized areas should be positioned so that moisture will drain out of them when unmated. Wires exit- ing connectors must be routed so that moisture drains away from them. 11-101. JUNCTION BOXES, PANELS, SHIELDS, AND MICROSWITCH HOUS- INGS. Examine housing assemblies to ascer- tain the following: a. Verify that one or more suitable holes, about 3/8-inch diameter, but not less than 1/8-inch diameter, are provided at the lowest point of the box, except vapor-tight boxes, to allow for drainage with the aircraft on the ground or in level flight. b. Verify that vapor tight or explosion proof boxes are externally labeled VAPOR- TIGHT or EXPLOSION PROOF. c. Verify that boxes are securely mounted. d. Verify that boxes are clean internally and free of foreign objects. e. Verify that safety wiring is installed on all lid fasteners on J-boxes, panels, shields, or microswitch housings which are installed in areas not accessible for inspection in flight, unless the fasteners incorporate self-locking devices. f. Verify that box wiring is properly aligned. g. Verify that there are no unplugged, un- used holes (except drainage holes) in boxes. 11-102. CONDUIT - RIGID METALLIC, FLEXIBLE METALLIC AND RIGID NONMETALLIC. Inspection of conduit as- semblies should ascertain that: a. Conduit is relieved of strain and flex- ing of ferrules. b. Conduit is not collapsed or flattened from excessive bending. c. Conduits will not trap fluids or con- densed moisture. Suitable drain holes should be provided at the low points. d. Bonding clamps do not cause damage to the conduit. e. Weatherproof shields on flexible con- duits of the nose and main landing gear and in wheel wells are not broken; that metallic braid of weatherproof conduit is not exposed; and that conduit nuts, ferrules, and conduit fittings are installed securely. f. Ends of open conduits are flared or routed to avoid sharp edges that could chafe wires exiting from the conduit. 11-103. JUNCTIONS. Ensure that only air- craft manufacturer approved devices, such as solderless type terminals, terminal blocks, connectors, disconnect splices, permanent splices, and feed-through bushings are used for cable junctions. Inspect for the provisions outlined below: a. Electrical junctions should be pro- tected from short circuits resulting from movement of personnel, cargo, cases, and other loose or stored materials. Protection should be provided by covering the junction, installing them in junction boxes, or by locat- ing them in such a manner that additional pro- tection is not required, etc. Page 11-48 Par 11-100PDF Image | AFS-640
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