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These motors are sometimes called DC motors, sometimes EC motors and occasionally DC/EC motors. DC stands for direct current and EC stands for electronically commutated.. DC motors allow the speed of the fans within a fan coil unit to be controlled by means of a 0-10 Volt input control signal to the motor/s, the transformers and speed switches associated with AC fan coils are not required.
Carbon capture and utilization, capturing CO 2 emissions and using the captured gas for a practical purpose; Concurrent users, number of users using the application simultaneously; Customer Configuration Updating, a software development method.
Polycarbonate, glass-reinforced, and fiberglass boxes are used where stronger cabinets are required, and may additionally have a gasket to exclude dust and moisture. Metal cabinets may meet the conductivity requirements for electrical safety bonding and shielding of enclosed equipment from electromagnetic interference.
A light fixture or luminaire is a technical and professional term for the electrical fixtures used to hold a lamp—a light bulb—the light source. Wikimedia Commons has media related to Lighting fixtures .
A distribution board (also known as panelboard, circuit breaker panel, breaker panel, electric panel, fuse box or DB box) is a component of an electricity supply system that divides an electrical power feed into subsidiary circuits while providing a protective fuse or circuit breaker for each circuit in a common enclosure.
A small metal, plastic or fiberglass junction box may form part of an electrical conduit or thermoplastic-sheathed cable (TPS) wiring system in a building. If designed for surface mounting, it is used mostly in ceilings, concrete or concealed behind an access panel—particularly in domestic or commercial buildings [2].
Zone 2 is the area above zone 1 up to a height of 3 m, as well as the area that is horizontally within 0.6 m from zone 1. Older regulations defined zone 3 as the area above zone 2 up to a height of 3 m, as well as the area that is horizontally within 2.4 m from zone 2; from BS 7671:2008, this is replaced by the term outside the zones. This ...
While the box is 1/2 inch wider the aperture remains the same at 4¾ inches by 1 inch. Subtle differences in the makers name, cipher and door length distinguish between the different types. LB211 GvR 1935 Pattern -In response to criticism of the narrow aperture of the original Lamp box a larger model was cast with the aperture enlarged to 5½ ...