Abstract:
Entry of water and water vapor into the core and splice case of a cable is avoided, despite the puncturing effect of lightning, by surrounding the core with an overlapped-seam plastic-coated aluminum vapor barrier which is bonded to a surrounding polyethylene tube thick enough to withstand the inner radial force of a sealing gland in a splice case without distorting and leaking. Surrounding this tube and vapor barrier, to protect them from the effects of lightning, is a lightning-absorbing aluminum shield and an outer polyethylene jacket.
Abstract:
An electrical communications cable having a plurality of insulated conductors is made waterproof by filling the intersticial spaces with a heated mixture of 85 percent petroleum jelly and 15 percent low-density polyethylene and cooling the mixture.