Commonly used photometric law

1. The inverse square law of illuminance

Definition: The illuminance perpendicular to the direction of propagation of the light is proportional to the intensity of the light source in that direction and inversely proportional to the square of the distance from the source to the surface.

Note: Only the point source meets the inverse square law of distance. (The test distance should not be less than 10 times the maximum size of the light exit surface of the lamp.)

2. The law of cosine of illumination:

3. Cosine Cube Law

Where: I—the intensity of the light from which the point source is directed;

H—the height of the light source from the plane;

Θ—the angle between the plane normal and the incident ray;

— OA length.

Mineral Insulated cables, or simply Mica cables, are cables in which conductors or wires are enclosed by a metal jacket and insulated with hard-packed mica. It is a variety of electrical cable made from copper conductors inside a copper sheath, insulated by mineral mica powder. Mineral Insulated cable is a specialized type of cable used in high temperatures or harsh environmental conditions because it has low flammability, even when operating at high temperatures. The maximum continuous operating temperature is 250℃. The cable can supply with power continuously for 3 hours at 950-1000℃. The mineral fillings in cables provide excellent non-reactive insulation. It resists oxidation and enables precise measurement. 
Mica cables

Advantages:

  • Low flammability
  • Resists oxidation
  • Easy installation
  • Long service life
  • High insulation resistance
  • High mechanical strength
  • Excellent shield performance
  • Exceptional vibration resistance to protect the mechanical conditions of the internal conductor wires
  • Can be drawn down to extremely small diameters, providing fast response times when used in temperature sensors
  • Can be formed/bent in the field without causing short circuits between the sheath and the internal wires, or between wires
  • Can be easily sealed around when used as extension or control cables in critical environments

electrical wires single core or multicore

Application:

  • Nuclear or hydrocarbon based energy plants
  • Emergency power systems
  • Exposure to dangerous gasses
  • Emergency lighting systems
  • Public buildings such as theatres, cinemas, hotels
  • Hospital operating rooms
  • Fire alarm systems
  • Transport hubs (railway stations, airports etc.)
  • Tunnels and mines
  • Electrical equipment in hazardous areas
  • And many more...

low flammability mica electrical cables

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Mineral Insulated Cable

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