Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 797
o. 26 a.) a. Must be entirely made of material that will resist the action of illumi-nating gases, and will not give way or soften under the heat of an ordinarygas-flame, or leak under a moderate pressure. They shall be so arrangedthat a deposit of moisture will not destroy the insulating effect,… … Insulating Joint for Gas Pipes. b. Insulating joints having soft rubber in their construction will not beapproved. GO. Resistance Boxes and Equalizers — (For installation rules, see No. 4.) a. Must be equipped with metal or with other non-combustible frames.The word frame in this section relates to…
Electrical engineering
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