Reduced Wiring Cost By Shared Neutrals
Because shared neutrals often cause problems when run upstream of dimmers, the idea of locating the dimmer as far downstream as possible reduces wiring costs by allowing shared neutrals to be run all the way up to and including the dimmer.
The one form of (much copied) distributed dimming is the Rosco 6-dimmer bar that is supplied by a 3-phase 20-Amp circuit, usually connected to an L21-20 receptacle.
As a conservative measure, the 6-dimmer bar usually comes wired with 10-gauge (although 12 gauge would be enough for 20Amps) wire, having a common (shared) neutral, and three hot wires, plus a ground (5 conductors in total, including the ground).
A shared neutral wire, such as "10/4" (10 gauge, 4-conductor, not including ground), runs to an L21-20 receptacle into which the dimming bar is plugged in.
On the dimming bar, there are six duplex receptacles, each one fed from an individually controlled (by way of DMX512) channel. The first and fourth outlet are on the first phase, the second and fifth on the next phase, and so-on, so that the phases are interleaved.
Another devices are made by "Entertainment Technology" (who do a sinewave dimmer version), Botex, Showtec's "multidim", stairville's power-bar and eurolite.
Read more about this topic: Distributed Dimming
Famous quotes containing the words reduced, cost and/or shared:
“There surely is a being who presides over the universe; and who, with infinite wisdom and power, has reduced the jarring elements into just order and proportion. Let speculative reasoners dispute, how far this beneficent being extends his care, and whether he prolongs our existence beyond the grave, in order to bestow on virtue its just reward, and render it fully triumphant.”
—David Hume (1711–1776)
“To become a token woman—whether you win the Nobel Prize or merely get tenure at the cost of denying your sisters—is to become something less than a man ... since men are loyal at least to their own world-view, their laws of brotherhood and self-interest.”
—Adrienne Rich (b. 1929)
“Men talk, but rarely about anything personal. Recent research on friendship ... has shown that male relationships are based on shared activities: men tend to do things together rather than simply be together.... Female friendships, particularly close friendships, are usually based on self-disclosure, or on talking about intimate aspects of their lives.”
—Bettina Arndt (20th century)