MIL-DTL-24643/69 LSC264 Coaxial Shipboard Cable

Mil-Spec Military part number MIL-DTL-24643/69 has one cable-type designation: LSC264. This cable is rated for 150 volts.  24643/69 cords use thermoset insulation and have an outer cross-linked polyolefin (XLPO) jacket. Each coaxial cable starts with a center conductor of either coated or uncoated copper, enclosed in thermoset insulation, which is then wrapped with a 36 AWG braided copper shield. This shield is insulated with two polyester tapes, with the outer tape being sealed. An alternative to this is a single polyester tape along with an extruded jacket of appropriate transparent material.

 

Four of these coaxial cables are joined with fillers as needed to make a firm, well-rounded assembly, with an optional binder. The entire assembly is wrapped by a 34 gauge tinned copper braid, constructed using 24 carriers, 9 ends, @ 10±1 pick/inch, enclosed in a moisture barrier tape with overlap and then a cross-linked polyolefin (XLPO) jacket. The cord is watertight. It operates within a temperature range of -20°C to +90°C. Watertight cables can operate in a wide variety of situations, including through bulkheads and between decks.

M24643/69 Construction:

• Conductors: Either uncoated or coated solid copper conductor 28AWG according to ASTM B286.
• Insulation: Thermoset
• Shield:
• For individual coaxial cables, 36 AWG tin-coated copper braid
• For the entire cable assembly, 34 AWG tin-coated copper braid
• Jacket: Low-smoke, zero-halogen (LSZH) cross-linked polyolefin (XLPO).

M24643/69 Ratings and Approvals

• Mil-Spec: MIL-DTL-24643
• ASTM B286
• Navy Shipboard Spec: LSC264
• Voltage Rating: 150V

Features and Benefits of M24643/69 Cords

• Watertight cables can operate in a wide variety of situations, including through bulkheads and between decks.
• Thermoset insulation is ideal for settings where durability and stiffness are essential
• LSZH jacket is fire resistant and emits low smoke, which is ideal for shipboard settings which often have restricted ventilation
• LSZH jackets also emit low acid, gas, and toxicity when subjected to fire, maintaining circuit integrity
• Shielded cables reduce electrical noise created by electromagnetic signals in the cable while also providing greater protection and durability than unshielded cables.
• Braided shielding is heavier than foil shielding and provides additional protection against EMI/RFI as well as protecting the cable in rugged environments. The braided shield also provides better grounding than foil shields.