Abstract: The insertion tube body of a borescope or endoscope is constructed to avoid leakage current. An inner coil is covered with a tubular urethane jacket over which a tubular braid is disposed. Terminators having sleeve portions are attached by inserting the sleeve portions between the coil and the jacket. The terminators are secured using epoxy and the braid is bound using a winding or wrap of thread. The braid does not contact the terminator or the coil, and floats electrically. A layer of a flexible tough material such as polyurethane is applied over the braid and onto the terminators.