How To Select Tension Clamps When Using Lgj And Lj Conductors

When using LGJ or LJ conductors, since Distribution box is clamped on the outer diameter of the conductor when used, the type of tension clamp used should be selected according to the outer diameter of the conductor. For example, when using LGJ-185/30 conductor in power lines, it is calculated that its outer diameter is 18.88mm. From the above table, it is known that the tension clamp that should be used is NLL-4, NLL-5 or NLD-4.

It should be noted here that the outer diameter of the LGJ conductor is calculated by adding the aluminum wire cross section of 185mm and the steel core cross section of 30mm, not simply by the aluminum wire cross section of 185mm. LGJ conductors of the same specification have different steel core cross sections and conductor outer diameters, so the tension clamps used for LGJ conductors of the same specification are not necessarily the same. If it is an LJ conductor, since it does not have a steel core, the cross section of the aluminum stranded wire can be used to calculate the outer diameter of the conductor.

In addition, since the tension clamp is clamped on the outer diameter of the conductor, we require that the outer layer of the LGJ or LJ conductor be wrapped with aluminum tape during construction to prevent damage to the conductor during crimping.