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  2. ANSI device numbers - Wikipedia

    en.wikipedia.org/wiki/ANSI_device_numbers

    Download QR code; Print/export Download as PDF; ... 20 - Electrically-Operated Valve (Solenoid Valve) ... Neutral Differential Protection / Restricted Earth Fault ...

  3. List of SIP response codes - Wikipedia

    en.wikipedia.org/wiki/List_of_SIP_response_codes

    [20] 480 Temporarily Unavailable Callee currently unavailable. [1]: §21.4.18 481 Call/Transaction Does Not Exist Server received a request that does not match any dialog or transaction. [1]: §21.4.19 482 Loop Detected Server has detected a loop. [1]: §21.4.20 483 Too Many Hops Max-Forwards header has reached the value '0'. [1]: §21.4.21

  4. Key Code Qualifier - Wikipedia

    en.wikipedia.org/wiki/Key_Code_Qualifier

    Key Code Qualifier is an error-code returned by a SCSI device. When a SCSI target device returns a check condition in response to a command , the initiator usually then issues a SCSI Request Sense command .

  5. Electrical fault - Wikipedia

    en.wikipedia.org/wiki/Electrical_fault

    In an electric power system, a fault or fault current is any abnormal electric current. For example, a short circuit is a fault in which a live wire touches a neutral or ground wire. An open-circuit fault occurs if a circuit is interrupted by a failure of a current-carrying wire (phase or neutral) or a blown fuse or circuit breaker .

  6. High resistance connection - Wikipedia

    en.wikipedia.org/wiki/High_resistance_connection

    Power fault circuit interrupters (PFCI) located in receptacles are designed to prevent fires caused by glowing connections in wiring or panels. [citation needed] From the receptacle a PFCI can detect the voltage drop when high current exists in a high resistance junction. In a properly designed and maintained circuit, substantial voltage drops ...

  7. Burroughs MCP - Wikipedia

    en.wikipedia.org/wiki/Burroughs_MCP

    In 1961, the MCP was the first OS written exclusively in a high-level language (HLL). The Burroughs Large System (B5000 [2] and successors) were unique in that they were designed with the expectation that all software, including system software, would be written in an HLL rather than in assembly language, which was a unique and innovative approach in 1961.

  8. 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 ...

  9. Fault current limiter - Wikipedia

    en.wikipedia.org/wiki/Fault_current_limiter

    A fault current limiter (FCL), also known as fault current controller (FCC), [1] is a device which limits the prospective fault current when a fault occurs (e.g. in a power transmission network) without complete disconnection.