3M™ In-Line Splice Crimp Connector with Scotch® Rubber Mastic Tape 2228 – Training

3M™ In-Line Splice Crimp Connector with Scotch® Rubber Mastic Tape 2228 – Training


To protect an in-line connector splice, we
use premium electrical tapes to provide electrical insulation, environmental seal and mechanical
protection. If you need rapid clean re-entry to the connection,
wrap it with two half-lapped layers of varnished cambric tape. In the example we are about to show you, we
are assuming that re-entry is not important so this step is not shown. Start by grasping the edge of the Scotch brand
Linerless Rubber Tape 130C at the top of the crimped connector. Pull it until it begins to stretch. It should be stretched to one-third its original
width, almost to the point of breaking. Begin wrapping it around the connector with
each lap of tape overlapping the previous layer by half the width of tape. We call this method of wrapping half-lapping. Wrap from the edge of the connector, past
the beginning of the cable jacket on one side. Hold the tape tightly and pass it from one
hand to the other while pulling just enough that you feel the tape stretching. This will help you provide a consistently
tight wrap. Then start wrapping back the other direction. Besides good electrical insulation, these
layers of rubber tape will provide excellent moisture resistance. When applied correctly, the tape layers fuse
together. If the tape breaks at any point, start at
a point about 1/4 inches before the spot where the tape broke and continue wrapping past
the point of break. Keep wrapping from an inch over the cable
jacket on one end to the same position on the other until you have four layers of rubber
tape. Once you have finished wrapping the final
layer of rubber tape, place one finger on the tape and pull quickly with the other hand. The rubber tape should snap off cleanly at
your finger. For re-insulating a connection, the rule of
thumb is that you should buildup the tape insulation to one and one-half times the existing
cable insulation. Next, start overwrapping with Scotch brand
Premium Vinyl Tape Super 33 Plus. The vinyl tape will not only add to the electrical
insulation, but also provide mechanical and abrasion protection for the rubber tape. Wrap the vinyl tape as you did the rubber
tape, half-lapping it with moderate tension just past the edge of the rubber tape on the
cable jacket, at least an inch onto the cable jacket. Wrap a minimum of two layers of the vinyl
tape in this way. At the end of the last layer, let the tension
out of the tape and cut it with a sharp blade, thumb down.

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