M27500 (NEMA WC27500) cables are the main cables used in the military and aerospace industry. Because this cable uses the primary wires from the main M22759, M81044, M81381, and M25038 basic wires, the M27500 spec encompasses most all constructions for desired cables. Of course, you can get specialty cables under other specifications or custom builds but the M27500 cable in most constructions is available off the shelf and in small quantities. The M27500 is a high temperature cable that can come shielded or unshielded as well as with one jacket and at times, a second jacket for demanding applications. Just as the primary conductors come in coatings of tin, silver, and nickel – so does the braided shielding within this spec. Flat braids are also available in the M27500 specification to allow for greater cable flexibility as well as shield coverage. The M27500 specification is a bit like an a la cart menu where you can choose your primary, then your conductor count, braid type and finally a jacket to hold it all together. This also presents a challenge for engineers trying to design an effective cable that is also actually available in the market at a reasonable quantity and lead time. Please consult our cable wizard (provide link) to help design a cable that will lead you down a path of best practices to help select a cable that is readily available and meets or exceeds your requirements.
Most cables require identification and that can be found on a marker tape on the inside of the cable or the outside jacket may require print. The print includes the part number and manufacturer cage code. The M27500 specification is now a Qualified Products List item so everyone must be qualified to manufacturer this set of cables. SEA Wire and Cable, Inc. is approved to make most all unshielded and unjacketed constructions, which allows for small minimums and very quick delivery. SEA also has a planetary twister that allows for very large gauge material to be cabled with reduced stress on the conductors. All cables manufactured by SEA are spark tested and Hi-Pot tested to the M27500 specification.
The M27500 cable can be a bit daunting with options for components and various marking iterations. Consult the cable wizard for the charts and part number breakdown for the specification.
To build a M27500 part number and check inventory, visit our cable wizard at: