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  2. Access mat - Wikipedia

    en.wikipedia.org/wiki/Access_mat

    An access mat is a portable platform used to support equipment used in construction and other resource-based activities, including drilling rigs, camps, tanks, and helipads. It may also be used as a structural roadway to provide passage over unstable ground, pipelines and more.

  3. Ground (electricity) - Wikipedia

    en.wikipedia.org/wiki/Ground_(electricity)

    If a second ground fault occurs, a ground fault protection relay must trip the breaker to protect the circuit. On an HRG system, a sensing resistor is used to continuously monitor system continuity. If an open-circuit is detected (e.g., due to a broken weld on the NGR), the monitoring device will sense voltage through the sensing resistor and ...

  4. Earthing system - Wikipedia

    en.wikipedia.org/wiki/Earthing_system

    Since the earth leakage is restricted, leakage protection devices can be set to less than 750 mA. By comparison, in a solidly earthed system, earth fault current can be as much as the available short-circuit current. The neutral earthing resistor is monitored to detect an interrupted ground connection and to shut off power if a fault is detected.

  5. Antistatic device - Wikipedia

    en.wikipedia.org/wiki/Antistatic_device

    Typical resistance is on the order of 10 5 to 10 8 ohms between points on the mat and to ground. [11] [12] The mat would need to be grounded (earthed). This is usually accomplished by plugging into the grounded line in an electrical outlet. It is important to discharge at a slow rate, therefore a resistor should be used in grounding the mat ...

  6. Ring ground - Wikipedia

    en.wikipedia.org/wiki/Ring_ground

    The halo is connected to the main building ground, which may include an underground ring ground outside the building, with vertical conductors especially in the corners of the building. Electrical equipment is also often placed in fully enclosed metal cabinets, which function as Faraday cages to further protect the equipment.

  7. The current price of Dollar Tree's products may increase again because of President-elect Donald Trump’s tariff plans, Dollar Tree executives said.. Apart from increased prices, the discount ...

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