IEEE Draft Standard for Electricity Access Requirements with Safety Extra Low Voltage (SELV) DC for Tier 2 and Tier 3 of the ESMAP Multi-tier Framework for Household Electricity Supply

Specifications are provided by this standard for direct current (dc)-based installations to address requirements given in Tier 2 and Tier 3 of the multi-tier framework (MTF). The MTF is discussed in detail in the Energy Sector Management Assistance Program (ESMAP) report published by the World Bank. Installation rules are provided by this standard, which is meant to be used in areas that are not connected to the ac public distribution network, for basic electricity supply from a renewable source. Use of a safety extra-low voltage (SELV) that can be safer to operate under normal, dry conditions is advocated by the standard. Circuit/branch current is limited to make it more difficult for an arc to propagate. Power access, which is possible without any special parts, is delivered by this approach. Wiring that is similar to that used in an ac system in a cost-effective and scalable manner can be used by the resultant installation.