Electrical wiring in the United Kingdom lawnmower does it need an RCD?" The risk of electrical shock on construction sites can be reduced by several measures, including reduction of the normal 230 volt distribution voltage to 110 volts for electrical lighting and power tools. By using a centre-tapped transformer, each conductor of the circuit is only at 55 volts with respect to earth. This reduces the chance of dangerous electrical shock when using power tools in wet locations. Where 230 volts must be used, a residual current device (RCD) can be used to detect small leakage currents and automatically isolate faulty equipment. In sites where hazardous
USNS Safeguard (T-ARS-50) MOD0 diving system allows surface-supplied diving to a depth of with lighter equipment. "Safeguard" carries SCUBA equipment for dives that require greater mobility than is possible in tethered diving. In addition to her two main ground tackle anchors [ Navy standard stockless or balanced-fluke anchors] "Safeguard" can use equipment associated with her beach gear to lay a multi-point open water moor to station herself for diving and ROV operations. A typical four-point moor consists of an X pattern with four Stato Anchors at the outside corners and "Safeguard" at the center, made fast to a spring buoy for the close