Mathematics (26303) -

: Defined by the NEC (National Electrical Code). Class I involves flammable gases, Class II involves combustible dust, and Class III involves ignitable fibers.

This module provides the fundamentals for electrical trainees regarding different lighting technologies and their physical installation. : Direct Lighting : 90% to 100% of light is directed downward. Mathematics (26303)

: The unit for measuring illuminance (light falling on a surface). One lumen falling on one square foot equals one footcandle. : Defined by the NEC (National Electrical Code)