Electricity: conductors and insulators – With fluids or vacuum – With cooling or fluid feeding – circulating or distributing
Patent
1986-06-06
1987-11-24
Nimmo, Morris H.
Electricity: conductors and insulators
With fluids or vacuum
With cooling or fluid feeding, circulating or distributing
521695, 52198, 174 37, 361384, H02G 303
Patent
active
047091207
ABSTRACT:
An improved underground utility equipment vault is comprised of at least two concentrically disposed chambers. The inner chamber is a non-electrically conductive material such as wood and is disposed in spaced concentric relationship within the outer chamber which is metallic, preferably steel. The exterior surface of the outer chamber is provided with a protective dielectric coating and cathodic protection in the form of sacrificial anodes. The inner chamber is provided with heat vents adjacent its uppermost surface area and cold air returns adjacent its lowermost surface area. The heat vents may be provided with exhaust fans. The inner chamber is provided with above ground air communication and an entryway. The interior of the inner chamber and electric gear therein contained is electrically isolated from the outer chamber and the vault exterior.
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Nimmo Morris H.
Swartwout, III Willis B.
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