The standard voltage of the electrical supply is 230 Volts and the standard frequency is 50 Hz. The 2-pin plug and socket system of type C and F, as in all European countries, is used. In type C, The plug has two 4 mm round pins, measuring 19 mm in length on centers spaced 18.6 mm apart at the base and 17.5 mm apart at the tip. The two pins have 10 mm long insulated sleeves. They converge slightly, but they are relatively flexible which allows the plug to mate with any socket that accepts 4.0 – 4.8 mm round contacts on 17.5 – 19 mm centers. Type F is similar to C except that it is round and has the addition of two grounding clips on the side of the plug. The plug has two 4.8 mm round pins, measuring 19 mm in length on centers spaced 19 mm apart. The distance between either of the two earthing clips and the middle of the imaginary line connecting the centers of the two power pins is 16 mm.