# 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

### Reviewing this brochure

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 Download: Right here | Get Download Updates | Get Technical articles