14 Creative Electrical Wiring Residential 18Th Edition Chapter 2 Images
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14 Creative Electrical Wiring Residential 18Th Edition Chapter 2 Images - What techniques can be used to mount luminaries (lighting fixtures) to an outlet field fixed to an offset bar hanger? The luminaries that weight much less than 6-lbs perhaps installed with 6-32 screws if it's miles wall mount and 8-32’s most any wherein else as much as 50-lbs. Then unique aid is needed for the box. (Pg. 30)—nec 314.27(a) and (b) what gain does a four-in. Octagon container have over a three¼-in. Octagon box? The extra length will allow a extra number of conductors to enter and exit the container. The intensity of the field also can be more with a four-in. Octagon field than a three ¼-in. What is the scale of the outlet of a transfer (tool) box for a single device? The size of a popular transfer box is two in. X three in. (Pg. 33) the space between a door casing and a window casing is three½ in. (88.9mm). Switches are to be mounted at this place. What sort of switches may be used? A piggy-back transfer, which means the switches are stacked in the identical vicinity as a single switch. A fashionable 2-gang square field requires 4 inches so that you can only use a single-gang container. (Pg. 34) 3 switches are mounted in a 3-gang switch (device) container. The wall plate for this assembly is known as a three-ganged cowl plate. The mounting holes in a device (transfer) field are tapped for no. 6-32 screws. The mounting holes in a outlet box are tapped for no. 8-32 screws. The mounting holes in metal containers for attaching gadget grounding conductors are tapped for 10-32 screws. A.) How excessive above the completed floor inside the living room are switches placed? 46 in. (Pg. 49) b.) How high above the storage ground are switches positioned? 46in.
An architectural plan display the region and kind of electric device required. (Pg.-20) what's an outlet? An access factor for an electrical device inclusive of a receptacle outlet, switch outlet, or lights outlet. (Pg.-20) fit the following switch kinds with the proper image. (Pg. 24) a) unmarried-pole sp b) three-manner s4 c) 4-way s d) single-pole with pilot s3 the plans display dashed traces going for walks among switches and various stores. What do these dashed lines suggest? The dashed strains method those switches control a part of the retailers that they go to. (Pg.-24) why are dashed lines typically curved? The curved strains will no longer be flawed for basis or wall traces. (Pg. 24) a. What are junctions boxes used for? Junction packing containers are used as guide for gadgets and lights in addition to protection wires and terminals. The boxes will incorporate the arch blast that would arise at some point of a fault. (Pg. 29) b. Are junction packing containers normally used in wiring the primary ground? Give an explanation for: when you have electric outlets, equipment attachment or just the joining of wires collectively you need to have a junction field that have to be available, whether it's miles on the first ground or any in which else. C. Are junction bins usually used to twine exposed quantities of the basement? Provide an explanation for: yes due to the fact uncovered portion of the wiring under eight toes are required to be covered from physical damage and packing containers are required any where you have got wires spliced. 7.) How are widespread sectional transfer (device) boxes established? Nec 314.20 states that bins need to be mounted so that they will be set again now not greater than 1/4in. (6mm) in noncombustible partitions or ceilings and flush while established in combustible. (Pg.-30) a. What's an offset bar hanger? A bar that is offset to allow the field to set out a determined quantity, the hanger additionally permits the box to be positioned faraway from the stud (pg.-27) b. What kind of boxes may be used with offset bar hangers? Containers which are designed to be used with the rated hanger, which means that they ought to be able to be connected to the offset bar hanger. The e-book indicates a spherical fixture box but most any kind of steel field could be used, but the set returned might not be accurate or might also need to be adjusted for. (Pg.-27).