Tecnolog
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All matter consists of atoms. Atoms are the
building blocks of matter.An atom consists of a nucleus containing one or more protons and neutrons.Electrons (green) are around the nucleus, forming an electron cloud .Electrons can move from an atom to another in some materials. Aluminium,Brass, Copper,Gold,Silver (conductors)Cotton, Glass,Leather (insulators),Silicon,Germanium,Aluminium nitride
building blocks of matter.An atom consists of a nucleus containing one or more protons and neutrons.Electrons (green) are around the nucleus, forming an electron cloud .Electrons can move from an atom to another in some materials. Aluminium,Brass, Copper,Gold,Silver (conductors)Cotton, Glass,Leather (insulators),Silicon,Germanium,Aluminium nitride
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Fire Alarm Specil Final
Sent by Cheat Sheets and classified under Technology and University at 27, January, 2008.
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NFPA 5000, NFPA Building Construction and Safety Code - This document provides minimum design regulations to safeguard life, limb, health, property, and public welfare. It provides information for regulating and controlling the permitting, design, construction, quality of materials, use and occupancy, location, and maintenance of all buildings and structures within the authority of jurisdiction(AHJ). It also regulates certain specific equipment within all buildings and structures.
In most cases, the fire alarm control unit, not the device, performs the actual determination of the alarm state.
Line detectors- Detection is continuous along the entire length of the detector in these detection devices. Typical examples may include certain older pneumatic rate-of-rise tubing detectors, projected beam-smoke detectors, and heat-sensitive cable.
Bimetallic- In a bimetallic detector two metals with different rates of thermal expansion are ... (Continuous)
In most cases, the fire alarm control unit, not the device, performs the actual determination of the alarm state.
Line detectors- Detection is continuous along the entire length of the detector in these detection devices. Typical examples may include certain older pneumatic rate-of-rise tubing detectors, projected beam-smoke detectors, and heat-sensitive cable.
Bimetallic- In a bimetallic detector two metals with different rates of thermal expansion are ... (Continuous)
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Codec Fire Alarms
Sent by Cheat Sheets and classified under Technology and University at 22, January, 2008.
Written in English and has a size of 4868 bytes
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13.8.10.6.2- Wiring installation shall meet the following requirements:
13.8.10.6.2.1- All conductors shall be minimum #16 gauge solid copper, type thhn, thwn or tfn. All wiring shall be run continously from device to device.
13.8.10.6.2.2- The minimum separation between the outgoing and return circuits shall be a minimum of one foot vertically and four feet horizontally in accordance with the provisions of NFPA- 72 6.4.2.2.2.
13.8.10.6.2.3- A cable-cutting tool with controlled depth of cut shaqll be used in all MC cable installations.
13.8.10.6.2.4- UL listed type MC cable connectors with insulated bushings and screw type cable attachments shall be used in all MC cable instalations. Connectors shall be steel, not the cast type.
13.8.10.6.2.5- Conductor size shall be increased as required so as to limit voltage drop to a maximum of three percent.
13.8.10.6.2.6- All initiating devices and notification appliances shall be supported independantly of their attachment to the circuit conductor.
... (Continuous)
13.8.10.6.2.1- All conductors shall be minimum #16 gauge solid copper, type thhn, thwn or tfn. All wiring shall be run continously from device to device.
13.8.10.6.2.2- The minimum separation between the outgoing and return circuits shall be a minimum of one foot vertically and four feet horizontally in accordance with the provisions of NFPA- 72 6.4.2.2.2.
13.8.10.6.2.3- A cable-cutting tool with controlled depth of cut shaqll be used in all MC cable installations.
13.8.10.6.2.4- UL listed type MC cable connectors with insulated bushings and screw type cable attachments shall be used in all MC cable instalations. Connectors shall be steel, not the cast type.
13.8.10.6.2.5- Conductor size shall be increased as required so as to limit voltage drop to a maximum of three percent.
13.8.10.6.2.6- All initiating devices and notification appliances shall be supported independantly of their attachment to the circuit conductor.
... (Continuous)
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