Process Engineering Division – Instrumentation and Automation Section – Daily Question – Question dated 2020-07-17

The non-live conductive parts or enclosures of electrical equipment are reliably connected to the ground using metal wires or conductors of sufficient capacity. When a person touches a live enclosure, the body acts as a parallel branch in the grounding circuit. Since the resistance of the human body is much greater than that of the grounding resistance, the current flowing through the body is very small, thereby preventing electric shock accidents.

Measures to ground the metal casing of the equipment. It prevents high currents from passing through the human body in case of insulation failure or when the metal casing becomes charged under unexpected circumstances, thereby ensuring personal safety.

Connecting the metal casing of electrical equipment, which is not energized under normal conditions, to a grounding device properly is called protective grounding.

Measures to ground the metal casing of the equipment. It prevents high currents from passing through the human body in case of insulation failure or when the metal casing becomes charged under unexpected circumstances, thereby ensuring personal safety.

Guiding the charge on the equipment into the ground in order to protect the equipment and human safety is called protective grounding.

Connecting the metal casing of electrical equipment, which is not energized under normal conditions, to a grounding device properly is called protective grounding

Protective grounding is a form of grounding carried out to prevent the metal enclosures of electrical devices, the frameworks of distribution installations, and utility poles from becoming charged, thereby protecting both people and equipment from potential hazards. The so-called protective grounding refers to the electrical metal parts that are not charged under normal conditions, but may become charged in the event of damage to the insulating material or under other circumstances (i.e., the metal structural parts that are insulated from the live parts). A protection wiring method that involves a reliable connection to a grounding electrode using wires. Grounding protection is generally used in power supply systems where the neutral point of the distribution transformer is not directly grounded (three-phase three-wire system), to ensure that the voltage relative to ground generated when electrical equipment leaks current due to insulation damage does not exceed safe levels.

Ground the metal parts of electrical equipment that may be live

Protective grounding is a form of grounding carried out to prevent the metal enclosures of electrical devices, the frameworks of distribution installations, and utility poles from becoming charged, thereby protecting both people and equipment from potential hazards. The so-called protective grounding refers to the electrical metal parts that are not charged under normal conditions, but may become charged in the event of damage to the insulating material or under other circumstances (i.e., the metal structural parts that are insulated from the live parts).

Protective grounding is a form of grounding carried out to prevent the metal enclosures of electrical devices, the frameworks of distribution installations, and utility poles from becoming charged, thereby protecting both people and equipment from potential hazards. Protective grounding refers to a protection wiring method in which the metal parts of electrical equipment that are normally not charged, but may become charged in the event of damage to the insulating materials or under other circumstances (i.e., the metal structural parts that are insulated from the live parts), are reliably connected to a grounding electrode using wires. Grounding protection is generally used in power supply systems where the neutral point of the distribution transformer is not directly grounded (three-phase three-wire system), to ensure that the voltage relative to ground generated when electrical equipment leaks current due to insulation damage does not exceed safe levels.