How To Select Bolt-type Tension Clamps When Using Lgj And Lj Conductors

When using LGJ or LJ conductors, since bolted type strain clamp is clamped on the outer diameter of the conductor when used, the model of dead end strain clamp should be selected according to the outer diameter of the conductor. For example, LGJ-185/30 conductor is used in power lines. After calculation, it can be known that its outer diameter is 18.88mm. From the above table, it can be known that the bolted dead end 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, and it is not simply calculated 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 has no 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.