 | American School (Lansing, Ill.) - 1907 - 438 стор.
...also to prevent space being used for storage of rubbish and oily waste. Lightning Arresters should be attached to each side of every overhead circuit connected with the station. It is recommended to all electric light and power companies that arresters be connected at intervals... | |
 | Saint Paul (Minn.). - 1908 - 1260 стор.
...therefrom by a non-inflammable, non-absorptive insulating material. 2042. 5. Lightning Arresters. — a. Must be attached to each side of every overhead circuit connected with the station. b. Must be located in readily accessible places away from combustible material, and as near as practicable to... | |
 | Sidney Aylmer-Small - 1908 - 952 стор.
...tested .and approved by the National Board of Fire Underwriters although it has a moving part.] 2. Must be attached to each side of every overhead circuit connected with the station. It is recommended to all electric light and power companies that arresters be connected at intervals... | |
 | Sidney Aylmer-Small - 1908 - 952 стор.
...tested. and approved by the National Board of Fire Underwriters although it has a moving part.] 2. Must be attached to each side of every overhead circuit connected with the station. It is recommended to all electric light and power companies that arresters be connected at intervals... | |
 | Sidney Aylmer-Small - 1909 - 456 стор.
...been tested and approved by the National Board of Fire Underwriters although it has a moving part.] 2. Must be attached to each side of every overhead circuit connected with the station. It is recommended to all electric light and power companies that arresters be connected at intervals... | |
 | Sidney Aylmer-Small - 1918 - 892 стор.
...been tested and approved by the National Board of Fire Underwriters although it has a moving part.] 2. Must be attached to each side of every overhead circuit connected with the station. It is recommended to all electric light and power companies that arresters be connected at intervals... | |
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Must be placed on the switch board, or, if not thereon, at a distance of a foot from combustible material, or separated therefrom by a non-inflammable, non-absorptive, insulating material. 
