This document provides guidelines for working on low voltage apparatus. It outlines general requirements, dangers, and procedures for working on both isolated and live apparatus. When working on isolated apparatus, all points of isolation must be locked or caution notices affixed. Live work is only permitted when suitable precautions are taken, like using insulated tools and protective equipment. Workers must be trained and verify apparatus is de-energized before starting. The document aims to prevent electric shock, burns, and other dangers to personnel maintaining low voltage electrical devices.