Heat and fireproof duct for electrical and communication wires a

Details Heat and fireproof duct for electrical and communication wires a Heat and fireproof duct for electrical and communication wires a

1992-09-02

1994-06-07

Nimmo, Morris H.

Electricity: conductors and insulators

With fluids or vacuum

Conduits, cables and conductors

174 11R, 174 151, 174 21R, 174 21C, H01B 734

Patent

active

053191552

ABSTRACT:
The duct comprises an inner tube in which the wires are disposed, and this inner duct is placed inside an outer tube so as to provide a continuous inner space between the tubes, which completely surrounds the inner tube. A water inlet is in communication with the inner space and water is allowed to penetrate into the inner space upon the opening of a valve. The valve is operated by a fire detector. Upon activation of the valve in case of fire, water circulates through the inner space and is rejected into a drain. This system constitutes a fire and heat barrier for the wires of a building, for example.

REFERENCES:
patent: 3654378 (1972-04-01), Rehder
patent: 3779179 (1973-12-01), Marois
patent: 3818116 (1974-06-01), Kuljian
patent: 3977704 (1976-08-01), Meyer
patent: 5109779 (1992-05-01), Maroist

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