A number of technological problems concerning the coils in internal conductor systems is investigated, with an efficient plasma confinement imposed as a working hypothesis: (i) At technically feasible power levels and linear dimensions, the Ohmic power losses can, under optimized conditions, be made much smaller than the thermonuclear reaction power, even with ordinary metal windings at temperatures of some hundred degrees centrigrade. Thus, superconducting coils should not become necessary in these systems, (ii) The mechanical stresses can be kept well below the limits of tensile strength of possible coil materials. In addition, both the internal coils and their magnetically shielded supports can be made magnetically force-free in certain cases, (iii) These results are due to the fact that high beta values are,in principle, available in systems with a main poloidal field, and that only a fraction of the total magnetic field energy originates from the internal conductors. This provides an important advantage over systems with a main toroidal field where, at a given plasma pressure, the Ohmic power losses and mechanical stresses become between one and two orders larger than those of poloidal field systems, (iv) The coil supports can be made large enough to provide cooling ducts for the internal conductor system.