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Load diversity

Discussion in 'Wiki' started by STEVETERRY, Nov 11, 2008.


    STEVETERRY Well-Known Member

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    New York
    In a theatrical dimming system, loads are rarely turned on full all at once. In addition, connected loads are typically far less than the "nameplate rating" or full-load capacity of the systems. These two conditions create "load diversity", that allows certain de-rating of system feeders and branch circuits under the rules of the NEC.

    For a view of typical loads connected to dimming systems, see the attached ETC Load Survey conducted in 2005.

    A relatively new condition affecting load diversity is the widespread use of arc-source automated fixtures, which draw full load for the entire performance, since their lamp is always on and dimming is accomplished via a mechanical douser.

    See also the article mentioned in the wiki entry Diversity, electrical.

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