Low voltage systems

Requirements for Electrical Installations, more commonly known as the Wiring Regulations, nominal a.c. voltages are defined as follows:

·         Extra-low voltage: not exceeding 50 V a.c., whether between conductors or to earth.

·         Low voltage: exceeding extra-low voltage, but not exceeding 1000 V a.c. between conductors, or 1500 V a.c. between conductors and earth.

·         High voltage: normally exceeding low voltage.