Briefly describe, in your own words, the difference between \"System Ground\" an

Question

Briefly describe, in your own words, the difference between "System Ground" and the "Equipment Ground. What is the largest size Grounding Electrode Conductor required for any service? What size Grounding Electrode Conductor would be required for 1000A, 277/480V, 3-Phase, 4- Wire Service with (4) sets of#250 KCMIL copper conductors per phase? What size Main Bonding Jumper is required for a 2000A, 120/208V., 3-Phase, 4-Wire service that has (6) sets of400 kCMIL copper conductors per phase? According to the National Electrical Code, how shall the Equipment Grounding Conductor be identified? A particular Branch Circuit is protected by a 100 A Circuit Breaker and contains a #8 AWG Equipment Grounding Conductor. If Electrical Metallic Tubing (EMT) is used as the conduit, is it possible to eliminate the #8 AWG EGC? Why or why not? What size copper Equipment Grounding conductor would be required for a feeder circuit that contains (11) sets of #500 KCMIL copper conductors and is protected by a 4000 A/3P circuit breaker? Is the main purpose of the Grounding Electrode to provide a low-impedance path to the earth in order to clear a ground-fault? Why or why not? Can a feeder with (3) sets of #500 kCMIL copper conductors be protected by a 1200A, fusible switch with 1200A KRP-C fuses and still met NEC requirements? Why or why not? What type of Emergency Power System would typically be installed in a vital infrastructure facility that if destroyed or incapacitated, would disrupt national security, the economy, public health, or safety?

Explanation / Answer

4) system grounding is the actual grounding of a current carrying conductor.it keeps voltage is stabilised.it uses to protect equipment.

Equipment grounding is connected non current carrying parts viz body or chasis etc.

It hits uses to protect personal.this grounding is done in case of inspiration failure.

5)the largest size of grounding electrode conductor required is NO.6 AWG

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