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2. Circuit breaker - Wikipedia

   en.wikipedia.org/wiki/Circuit_breaker

   Two-pole common-trip breakers are common on 120/240-volt systems where 240 volt loads (including major appliances or further distribution boards) span the two live wires. Three-pole common-trip breakers are typically used to supply three-phase power to powerful motors or further distribution boards.

3. IEC 60269 - Wikipedia

   en.wikipedia.org/wiki/IEC_60269

   Introduced in 1909 by Siemens, they are available today in five different body sizes, with ratings from 2 A up to 200 A (see table), though only D II and D III fuses are commonly used. The designation of a size consists of the letter D and a Roman numeral. Higher-voltage types rated up to 750 V have increased clearance distances and are longer ...

4. Stab-Lok - Wikipedia

   en.wikipedia.org/wiki/Stab-Lok

   Angie's List and NBC Bay Area both highlighted an October 2002 ruling in a New Jersey Superior Court, which found that FPE (Federal Pacific Electric), the manufacturer of the Stab-Lok breakers and panels, "knowingly and purposefully [sic] distributed circuit breakers which were not tested to meet UL standards as indicated on their label".

5. Siemens - Wikipedia

   en.wikipedia.org/wiki/Siemens

   Siemens is the largest industrial manufacturing company in Europe, [7] and holds the position of global market leader in industrial automation and industrial software. [8] The origins of the conglomerate can be traced back to 1847 to the Telegraphen Bau-Anstalt von Siemens & Halske established in Berlin by Werner von Siemens and Johann Georg ...

6. Residual-current device - Wikipedia

   en.wikipedia.org/wiki/Residual-current_device

   A residual-current device (RCD), residual-current circuit breaker (RCCB) or ground fault circuit interrupter (GFCI) [a] is an electrical safety device, more specifically a form of Earth-leakage circuit breaker, that interrupts an electrical circuit when the current passing through line and neutral conductors of a circuit is not equal (the term residual relating to the imbalance), therefore ...

7. Electric power distribution - Wikipedia

   en.wikipedia.org/wiki/Electric_power_distribution

   Rural services normally try to minimize the number of poles and wires. It uses higher voltages (than urban distribution), which in turn permits use of galvanized steel wire. The strong steel wire allows for less expensive wide pole spacing. In rural areas a pole-mount transformer may serve only one customer.