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Early orchestras did not utilize a conductor, but instead the concertmaster or the continuo player, generally the harpsichordist, led the orchestra.As the orchestra grew in size throughout the latter half of the 18th century, composers generally conducted their music to facilitate more expedient and efficient rehearsal and performance preparation.
The designation NM XX-Y indicates, respectively, the type of sheathing (in this case, non-metallic), the size of the main conductors, and the total number of circuit conductors (exclusive of the grounding conductor). For example, NM 14-2 cable contains three conductors (two plus one ground) at 14 gauge, a size typically used for circuits ...
The following table lists equivalent radii for various conductor cross-sections derived assuming 1) all dimensions are much less than , 2) for cross-sections composed of multiple conductors, the distances between conductors are much greater than any single conductor dimension. . Formulas for the square and triangular cross-sections follow from ...
This is a non-exhaustive list of principal conductors by orchestra, principally for orchestras with pages on Wikipedia, classified by country and by city. The term 'principal conductor' is used here as an umbrella term to encompass such titles as: Principal conductor; Music director; Chief conductor
Comparison of SWG (red), AWG (blue) and IEC 60228 (black) wire gauge sizes from 0.03 to 200 mm² to scale on a 1 mm grid – in the SVG file, hover over a size to highlight it. In engineering applications, it is often most convenient to describe a wire in terms of its cross-section area, rather than its diameter, because the cross section is directly proportional to its strength and weight ...
The International Electrotechnical Commission (IEC; French: Commission électrotechnique internationale) is an international standards organization that prepares and publishes international standards for all electrical, electronic and related technologies.
The three-phase phase colours are brown, black and grey instead of red, yellow and blue. Where a circuit includes a neutral or mid-point conductor identified by colour, the colour used shall be blue. In all installations the earth or protective conductor will remain green-and-yellow. 1992--
The protective earth conductor may also be covered with green/yellow (or green only) insulation, although, in some countries, this conductor may be left as bare copper. With cables where the current-carrying conductors are of a large cross sectional area (CSA), the protective earth conductor may be smaller, with a lower continuous current ...