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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.
Large low-voltage molded-case and power circuit breakers may have electric motor operators so they can open and close under remote control. These may form part of an automatic transfer switch system for standby power. Low-voltage circuit breakers are also made for direct-current (DC) applications, such as for subway lines.
In an electrical power distribution system, a ring main unit (RMU) is a factory assembled, metal enclosed set of switchgear used at the load connection points of a ring-type distribution network. It includes in one unit two switches that can connect the load to either or both main conductors, and a fusible switch or circuit breaker and switch ...
Automating and controlling devices and energy usage in homes has potentially become a bit easier thanks to an integration between Span, the startup making a digital fusebox replacement, and Amazon ...
Such an old fusebox will contain a main switch and a set of fuses, possibly of the re-wireable kind. A more modern consumer unit will contain at a minimum a main switch and an individual miniature circuit breaker (MCB) for each final circuit. Fuses and MCBs are overcurrent devices providing overload, short-circuit and earth fault protection.
In electronics and electrical engineering, a fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit. Its essential component is a metal wire or strip that melts when too much current flows through it, thereby stopping or interrupting the current.
Amendment No.2:2004 to BS 7671:2001 implements the cable core colours introduced in the revision of CENELEC Harmonization Document HD 308 S2: 2001 Identification of cores in cables and flexible cords and agrees generally with BS EN 60446 : 2000 Basic and safety principles for the man-machine interface, marking and identification.
To replace IEEE 200-1975, ASME, a standards body for mechanical engineers, initiated the new standard ASME Y14.44-2008. This standard, along with IEEE 315-1975, provide the electrical designer with guidance on how to properly reference and annotate everything from a single circuit board to a collection of complete enclosures.