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2. Current sensing - Wikipedia

   en.wikipedia.org/wiki/Current_sensing

   In electrical engineering, current sensing is any one of several techniques used to measure electric current. The measurement of current ranges from picoamps to tens of thousands of amperes. The selection of a current sensing method depends on requirements such as magnitude, accuracy, bandwidth, robustness, cost, isolation or size. The current ...

3. Electrical contact - Wikipedia

   en.wikipedia.org/wiki/Electrical_contact

   An electrical contact is an electrical circuit component found in electrical switches, relays, connectors and circuit breakers. [1] Each contact is a piece of electrically conductive material, typically metal.

4. Electrical wiring - Wikipedia

   en.wikipedia.org/wiki/Electrical_wiring

   A wire or cable has a voltage (to neutral) rating and a maximum conductor surface temperature rating. The amount of current a cable or wire can safely carry depends on the installation conditions. The international standard wire sizes are given in the IEC 60228 standard of the International Electrotechnical Commission.

5. Contact resistance - Wikipedia

   en.wikipedia.org/wiki/Contact_resistance

   For example, corroded jumper cable clamps can frustrate attempts to start a vehicle that has a low battery. Dirty or corroded contacts on a fuse or its holder can give the false impression that the fuse is blown. A sufficiently high contact resistance can cause substantial heating in a high current device. Unpredictable or noisy contacts are a ...

6. Current clamp - Wikipedia

   en.wikipedia.org/wiki/Current_clamp

   In particular if the clamp is closed around a two-conductor cable carrying power to equipment, the same current flows down one conductor and up the other; the meter correctly reads a net current of zero. As electrical cables for equipment have both insulated conductors (and possibly an earth wire) bonded together, clamp meters are often used ...

7. Circuit breaker - Wikipedia

   en.wikipedia.org/wiki/Circuit_breaker

   Residual-current circuit breaker with overcurrent protection — combines the functions of a RCD and a MCB in one package. In the United States and Canada, these are called GFCI breakers. Earth leakage circuit breaker (ELCB) — This detects current in the earth wire directly rather than detecting imbalance. They are no longer seen in new ...

8. Wetting current - Wikipedia

   en.wikipedia.org/wiki/Wetting_current

   A related term sealing current (aka wetting current or fritting current) is widely used in the telecommunication industry describing a small constant DC current (typically 1-20 mA) in copper wire loops in order to avoid contact oxidation of contacts and splices.

9. Cable tester - Wikipedia

   en.wikipedia.org/wiki/Cable_tester

   A cable tester is an electronic device used to verify the electrical connections in a signal cable or other wired assembly. Basic cable testers are continuity testers that verify the existence of a conductive path between ends of the cable, and verify the correct wiring of connectors on the cable. More advanced cable testers can measure the ...