First and second conduits are joined in a manner to control electrical resistance of a conduit circuit. A cylindrical section of an adapter is placed onto an end of the first conduit. A part of the cylindrical section is crimped onto the first conduit while a spacing block made of a polymer material having a previously chosen conductivity is positioned around the end of the first conduit and clipped onto the cylindrical section. The crimping locks the spacing block to the adapter and deforms an assembly comprising the clipping pieces of the spacing block and the adapter, so as to immobilize the clipping pieces relative to each other in a direction parallel to an axis of the cylindrical section of the adapter, and such that an exterior surface of the first conduit engages interior surfaces of the spacing block and the adapter.