 | 1891 - 680 стор.
...Between these points the conductors must be heavily insulated with a coating of moisture-proof material, and, in addition, must be so covered and protected...contact with them shall be practically impossible. 3. The primary conductors, if within a building, must be furnifhed with a double-pole switch, and also... | |
 | National Electric Light Association. Convention - 1892 - 458 стор.
...Between these points the conductors must be heavily insulated with a coating of moisture-proof material, and, in addition, must be so covered and protected...contact with them shall be practically impossible. 3. The primary conductors, if within a building, must be furnished with a double pole switch, and also... | |
 | Earle Abbott Merrill - 1892 - 188 стор.
...Between these points the conductors must be heavily insulated with a coating of moisture-proof material, and, in addition, must be so covered and protected...contact with them shall be practically impossible. 3. The primary conductors, if within a building, must be furnished with a double pole switch, and also... | |
 | Arthur Eugene Watson - 1892 - 118 стор.
...heavily insulated with a coating of approved waterproof material, and, in addition, must be so covered-in and- protected, that mechanical injury to them, or...contact with them, shall be practically impossible. 34. These primary conductors, if within a building, must also be furnished with a double-pole switch,... | |
 | Caryl Davis Haskins - 1892 - 168 стор.
...heavily insulated with a coating of approved waterproof material and, in addition, must be so covered-in and protected that mechanical injury to them, or contact with them, shall be practically impossible. These primary conductors, if within a building, must also be furnished with a double-pole switch, or... | |
 | Earle Abbott Merrill - 1892 - 188 стор.
...within a building, must be furnished \vith a double pole switch, and also with an automatic double pole cut-out where the wires enter the building, or where they leave the main line, on the pole or in the conduit. These switches should, if possible, be inclosed in secure and fireproof... | |
 | Charles M. Davis - 1893 - 162 стор.
...that it shall be thoroughly ventilated to the outdoor air, if possible, through a chimney or flue. 34. PRIMARY CONDUCTORS— a. Must each be heavily insulated...enter the building, or where they leave the main line, on the pole or in the conduit. These switches should be enclosed in secure and fireproof boxes preferably... | |
 | La Motte C. Atwood - 1893 - 180 стор.
...insulated with a coating of approved water-proof material, and, in addition, must be so covered in and protected that mechanical injury to them, or contact with them, shall be practically impossible. 34. These primary conductors, if within a building, must also be furnished with a double-pole switch,... | |
 | 1894 - 622 стор.
...Between them points the conductors must be heavily Insulated with a coating of moisture-proof material, and In addition must be so covered and protected that...contact with them shall be practically impossible. 3. The primary conductors, if within a building, must be furnished with a double pole switch, and also... | |
 | Arthur Vaughan Abbott - 1895 - 646 стор.
...conductors, if within a building, must be furnished with a double-pole switch, and also with a double-pole cut-out where the wires enter the building, or where they leave the main line on the pole or in the conduit. These switches should, if possible, be inclosed in secure and fireproof... | |
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Must each be heavily insulated with a coating of moisture-proof material from the point of entrance to the transformer, and, in addition, must be so covered and protected that mechanical injury to them, or contact with them, shall be practically impossible.... 
