 | American Institute of Electrical Engineers - 1897 - 710 стор.
...the curve of the inner edge of any elbow not to be less than three and one-half inches Must have not more' than the equivalent of four quarter bends from outlet to outlet, the bends at the outlets not being counted. 42. Wooden Mouldings.— (For wiring rules see No. 24.) a. Must have,... | |
 | American Society of Mechanical Engineers - 1898 - 1122 стор.
...the curve of the inner edge of any elbow not to be less than three and one-half inches. Must have not more than the equivalent of four quarter bends from outlet to outlet ; the bends at the outlets not being counted. UNLINED METAL CONDUITS. j.. Plain iron or steel pipes of equal thickness,... | |
 | Francis Bacon Crocker - 1901 - 528 стор.
...the curve of the inner edge of any elbow not to be less than three and one-half inches. Must have not more than the equivalent of four quarter bends from outlet to outlet, the bends at the outlet not being counted. 50. Wooden Moldings — (For wiring rules, see No. 24.) a. Must have,... | |
 | Horatio Alvah Foster - 1901 - 1018 стор.
...the curve of the inner edge of any elbow not to be less than three and one-half inches. Must have not more than the equivalent of four quarter bends from outlet to outlet, the bends at the outlets not being counted. U>"LIXK1> METAL CONDUITS. j. Plain iron or steel pipes of equal thickness... | |
 | Harry Cooke Cushing - 1902 - 204 стор.
...the inner edge of any elbow should not be less than three and one-half inches. There should not be more than the equivalent of four quarter bends from...satisfactory manner, so that it may be readily seen, and thus possible to place the responsibility for pieces not up to standard. Uninsulated Metal Conduits... | |
 | 1902 - 738 стор.
...Specifications for Interior Conduits. — a. Each length of conduit, whether insulated or uninsulated, must have the maker's name or initials stamped in the metal or attached thereto in a satisfactory manner, so that the inspectors can readily see the same. Metal Conduits with... | |
 | American School (Lansing, Ill.) - 1903 - 320 стор.
...the inner edge of any elbow should not be less than three and one-half inches. There should not be more than the equivalent of four quarter bends from...responsibility for pieces not up to standard. Uninsulated Fletal Conduits or plain iron or steel pipes may be used instead of the insulated metal conduits, if... | |
 | Arthur Vaughan Abbott - 1904 - 754 стор.
...from lengths of pipe. The inner radius of any elbow must not be less than 3i inches. Must have not more than the equivalent of four quarter bends from outlet to outlet, the bends at the outlets not being counted. 141. 42. Wooden Moldings. a. Must have, both inside and outside, at... | |
 | 1906 - 582 стор.
...The radius of the curve of the inner edge of any elbow not to be less than 3i inches. Must have not more than the equivalent of four quarter bends from outlet to outlet, the bends at the outlets not being counted. 47. While a conduit system is considered merely as a system of raceways... | |
 | 1906 - 590 стор.
...the inner edge of any elbow should not be less than three and one-half inches. There should not be more than the equivalent of four quarter bends from...responsibility for pieces not up to standard. Uninsulated fletal Conduits or plain iron or steel pipes may be used instead of the insulated metal conduits, if... | |
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There should not be more than the equivalent of four quarter bends from outlet to outlet, the bends at... 
