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
Operation Safeguard Operation Safeguard Operation Safeguard is a contingency plan to deal with prison overcrowding in the United Kingdom; it involves using cells at police stations as accommodation for prisoners when the number of cells in prisons becomes critically low. On 9 October 2006, the Home Secretary John Reid announced the implementation of Operation Safeguard as the prison population had reached 79,843 leaving only 125 spaces. The policy is supported by the Association of Chief Police Officers, it outlined a list of criteria for prisoners who should not be held in police station cells under Safeguard, including among others: women, juveniles and