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
USS Safeguard (ARS-25) USS Safeguard (ARS-25) USS "Safeguard" (ARS-25) was an commissioned by the U.S. Navy during World War II. Her task was to come to the aid of stricken vessels. "Safeguard" was laid down on 5 June 1943 by the Basalt Rock Company in Napa, California; launched on 20 November 1943; and commissioned on 30 September 1944 at the Southern Pacific Docks, Vallejo, California, Lt. J. F. Simmons in command. Following shakedown out of San Diego, California, "Safeguard" called at San Pedro, California, and San Francisco before commencing the first of many deep water towing operations on 23 December. With "YC-1165" and