Chase nipple with insulated throat (Bushed nipple) is enhanced with a built-in nylon lining that protects wires from metal burrs, effectively preventing ground faults and arc faults. It is used with a coupling to connect RMC or IMC to an enclosure, or with locknuts to join two enclosures side-by-side or back-to-back. In both applications, it provides a smooth, rounded edge that prevents wire abrasion at the termination point.