High voltage distribution may be a three-phase, single-phase or single wire earth return (SWER) system. In areas which are reticulated by three phase and single-phase systems, there is little attraction in using a SWER at the expense of increase in cost in providing spares and training to the staff in operation and maintenance of an unfamiliar system. In large rural areas the SWER system has been found to be successful and does not pose any serious problem. It is more reliable and the expenditure incurred is also considerably reduced. This system may be applied as a means to meet basic energy needs and promoting productivity in sparsely populated and isolated villages where the loading is scattered and small and not likely to increase substantially in 5-10 years time.