 | 1891 - 680 стор.
...switch so arranged that only one of the circuits can be in use at the same time. CLASS F.— BATTERIES. When current for light and power is taken from primary...batteries, the same general regulations must be observed as apply to such wires fed from dynamo generators, developing the same difference of potential. CLASS... | |
 | Earle Abbott Merrill - 1892 - 188 стор.
...switch so arranged that only one of the circuits can be in use at the same time. CLASS F. — BATTERIES. When current for light and power is taken from primary...batteries, the same general regulations must be observed as apply to such wires fed from dynamo generators developing the same difference of potential. CLASS G.... | |
 | National Electric Light Association. Convention - 1892 - 458 стор.
...switch so arranged that only one of the circuits can be in use at the same time. CLASS F. BATTERIES. When current for light and power is taken from primary...batteries, the same general regulations must be observed as apply to such wires fed from dynamo generators, developing the same difference of potential. CLASS... | |
 | Charles M. Davis - 1893 - 162 стор.
...or other device that will immediately cut off the current in case the trolley wires become grounded. This device must be mounted on a fire-proof base and in full view and reach of the attendant. 38. TROLLEY WIRES— a. Must be no smaller than No. o B. & S. copper or No. 4 B. & S. silicon bronze,... | |
 | 1894 - 622 стор.
...should be made of the connections and the specific gravity of the solution. Wnen current for lieht and power Is taken from primary or secondary batteries, the same general regulations must be observed as apply to such wires fed from dynamo generators developing the same difference of potential. CLASS Q.—... | |
 | Arthur Vaughan Abbott - 1895 - 646 стор.
...insulated. Frequent examinations should be made of the connections and the specific gravity of the solution. When current for light and power is taken from primary...batteries, the same general regulations must be observed as apply to such wires fed from dynamo generators developing the same difference of potential. 155. Class... | |
 | Earle Abbott Merrill - 1896 - 222 стор.
...50 feet, or 50 volts to the mile between any two points in the earth or pipes therein. Class F. 44. STORAGE OR PRIMARY BATTERIES : — a. When current...batteries, the same general regulations must be observed as apply to similar apparatus fed from dynamo generators developing the same difference of potential.... | |
 | Earle Abbott Merrilol - 1896 - 232 стор.
...or other device that will immediately cut off the current in case the trolley wires become grounded. This device must be mounted on a fireproof base and in full view and reach of the attendant. (See Definitions). 39. TROLLEY WIRES:— b. Must be well insulated from their supports, and in case... | |
 | Nehemiah Hawkins - 1896 - 570 стор.
...or other device that will immediately cut off the current in case the trolley wires become grounded. This device must be mounted on a fireproof base, and in full view and reach of the attendant. (See Definitions.) . 39. TROU.EY WIRES : a. Must be no smaller than No. o, B. & S. copper or No. 4,... | |
 | Earle Abbott Merrill - 1896 - 232 стор.
...or other device that will immediately cut off the current in case the trolley wires become grounded. This device must be mounted on a fireproof base and in full view and reach of the attendant. (See Definitions). 39. TROLLEY WIRES: — a. Must be no smaller than No. 0 B. & S. copper, or No. 4... | |
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BATTERIES — a. When current for light and power is taken from primary or secondary batteries, the same general regulations must be observed as applied to similar apparatus fed from dynamo generators developing the same difference of potential. 
