Glossary of Wire & Cable Terminology

A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z


J-BOX - Abbreviation for junction box. A box for joining different runs of raceway or cable, plus space for connecting
and branching the enclosed conductors.

JACKET - A covering over insulation usually nonmetallic, plastic, rubber, cotton, Neoprene, fluoropolymer, or glass. Neoprene is a trademark of the DuPont de Nemours Co.

JAN-C-17A - Joint Army-Navy specifications covering coaxial cables used for high frequency applications in radio, television, radar, etc.

JAN-C-76A - Joint Army-Navy specifications covering radio hook-up wire. Types SRIR, SRHV, WL, and SRRF. Superseded by MIL-W-76.

JOULE - The unit of measure for energy or work. The international joule is equal to the work required to maintain a current of one ampere for one second in a resistance of one ohm.

JUMPER - Usually a temporary connection. A short length of conductor to connect between terminals, across a break in a circuit, or around an instrument.

JUTE FILLER - Rope like strands of material used in cables for filling in the voids to form a rounded final cable shape.

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