Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 295
nclosure so thatit can be entered only from outdoors, since then, even if the doorshould happen to be open at the time of a fire in this room, it isprobable that no especial harm would be done. Moreover, the fire 262 UNDERWRITERS REQUIREMENTS 139 could doubtless be better handled from the outside.… … Fig. 13-1 * Approved Method of Protecting Transformers in a Vault thoroughly ventilated to the outdoor air, if possible through a chim-ney or flue. There should be at least six inches of air space on allsides of the transformer. This rule will permit of either the insulatingor grounding of…
Electrical engineering
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