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
Infraspecific name is "Acanthocalycium klimpelianum", which can be abbreviated to "A. klimpelianum" where the context makes the genus clear. The species cannot be referred to as just "klimpelianum". In the same way, the name of a particular variety of "Acanthocalycium klimpelianum" is "Acanthocalycium klimpelianum" var. "macranthum", which can be abbreviated to "A. k." var. "macranthum" where the context makes the species clear. The variety cannot be referred to as just "macranthum". Sometimes more than three parts will be given; strictly speaking, this is not a name, but a classification. The ICN gives the example of "Saxifraga aizoon" var. "aizoon" subvar. "brevifolia" f.