In some implementations, the isolator 100 can include the insulator sleeve 135. As illustrated in FIG. 4F, the insulator sleeve 135 can be placed over a portion of the outer shield 106. The insulator sleeve 135 can create an insulating barrier or grip on the outside of the isolator 100 so that the isolator 100 can be safely handled by an installer or user. When the shield 106 is compression fitted over the body 102, the lip 137 of the insulator sleeve 135 can fit between the lip 110 of the body 102 and the edge 112 of the outer shield 106.