[Electric engineering.] . Fig. 13. for they have one advantage in that the holder may beentirely removed from the board when the fuse is beingreplaced, or another reserve holder may be put in instead ofthe one removed. Fig. 13 (b) shows one of these is held in place by the clips b, b that receive theblades a, a. Fig. 14 shows a plain two-wire board for fourbranch circuits; it is equipped with Edison fuse plugs and 27 INTERIOR WIRING. 29 has no switches. The above will give a general idea as tothe construction of these boards. They are made in allsorts of combinations and, in fact, a
[Electric engineering.] . Fig. 13. for they have one advantage in that the holder may beentirely removed from the board when the fuse is beingreplaced, or another reserve holder may be put in instead ofthe one removed. Fig. 13 (b) shows one of these is held in place by the clips b, b that receive theblades a, a. Fig. 14 shows a plain two-wire board for fourbranch circuits; it is equipped with Edison fuse plugs and 27 INTERIOR WIRING. 29 has no switches. The above will give a general idea as tothe construction of these boards. They are made in allsorts of combinations and, in fact, are usually made toorder for any given job. In large wiring systems, the. Fig. 14. design of the cut-out closets, or cabinets, is a matter ofgreat importance, and the location of these closets is equallyimportant; they should be placed in a position where theycan be readily reached. 28. The following Underwriters rules relate to cut-outcabinets: Cut-Otit Cabinetsâ Must be so constructed and cut-outs so arrangedas to obviate any danger of the melted fuse metalcoming in contact with any substance that mightbe ignited thereby. The following specifications should be followed: Material.â a. Boxes may be of marble, slate, or wood. Ifwood is used, the inside of the box must be linedwith non-combustible material, such as slate orasbestos board. If asbestos board is used, it mustbe at least \ inch in thickness, must be neatly puton, and firmly secured in place by shellac and tacks. Door.â b. The door must close against a rabbet, so asto be perfectly dust-tight. Strong hinges and astrong hook or catch are required. Glass doors /. II.âiB, 30 INTERIOR WIRING. Â
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