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A lightbulb socket, lightbulb holder, light socket, lamp socket or lamp holder is a device which mechanically supports and provides electrical connections for a compatible electric lamp base. [1] Sockets allow lamps to be safely and conveniently replaced (re-lamping).
A socket extender makes the bulb stick out further, such as to accommodate a compact fluorescent lamp that is too large to fit in a recessed lighting fixture. Most Edison screws have right-hand threads (lamp is turned clockwise to tighten), but left-hand threaded screws are sometimes used, usually for a non-standard voltage or wattage bulb.
An extended specification, THWN-2 permits use in wet locations and conductor temperatures up to 90°C simultaneously. [ 18 ] There are additional restrictions on such wire's use not mentioned here (for example, neither THHN nor THWN may be exposed to sunlight, or directly buried in the ground [ 20 ] ); see the NEC for details.
The conduit methods were known to be of better quality, but cost significantly more than K&T. [2] In 1909, flexible armored cable cost about twice as much as K&T, and conduit cost about three times the price of K&T. [6] Knob and tube wiring persisted since it allowed owners to wire a building for electricity at lower cost.
Dual 3-pin socket-outlet construction Switched dual 3-pin socket-outlet Socket-outlet, using insulation displacement as a means of connecting to low voltage (230 V) supply conductors AS/NZS 3112 compliant plugs have two flat pins forming an inverted V-shape plus a vertical earthing pin.
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Average mortgage rates are moderately lower as of Thursday, January 2, 2025, with the average 30-year purchase rate dipping below 7.00% in the new year — about where we were this time last year ...
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