Electrical Plan Review Booklet

Objectives of Electrical Plan Review //

Content of Electrical Plan Review Booklet:

1. Overcurrent Protection and Devices,
2. Short-Circuit Calculations,
3. Component Protection,
4. Selective Coordination and
5. Other Considerations

By reviewing this brochure, the Electrical Inspector, Electrical Contractor, Plan Examiner, Consulting Engineer and others will be able to:

Understand and discuss //

• The critical National Electrical Code® requirements regarding overcurrent protection.
• Short-circuit currents and the importance of overcurrent protection.
• Three ratings (voltage, ampere, and interrupting) of overcurrent protective devices.
• That the major sources of short-circuit currents are motors and generators.
• That transformers are NOT a source of short-circuit current.
• Calculation of short-circuit currents using the simple POINT-TO-POINT method and related charts.
• Current-limitation and use of let-through charts to determine the let-through current values (peak & RMS) when current-limiting overcurrent devices are used to protect electrical components.
• Series rated combinations and proper application of series rated combinations.
• Selective coordination of overcurrent protective devices.
• The meaning and importance of electrical terms commonly used relating to overcurrent protection.
• Maintenance, testing, resetting, and replacement requirements of overcurrent protective devices.

Realize and check //

• Realize that whenever overcurrent protection is discussed, the two most important issues are:
  • How much current will flow?
  • How long will the current flow?
• Electrical plans to determine conformance to the National Electrical Code® including:
  • Short-circuit currents,
  • Interrupting ratings,
  • Short-circuit current (withstand) ratings,
  • Selective coordination,
  • Ground faults, grounding electrode conductors,
  • Equipment grounding conductors, etc.

Title:	Electrical Plan Review – Overcurrent Protection and Devices, Short-Circuit Calculations, Component Protection, Selective Coordination, and Other Considerations – COOPER Bussmann
Format:	PDF
Size:	1.62 MB
Pages:	45
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