A. Switchgear and Switchboard Assemblies

1. Properties and Types

Identify properties, types, and applications ^{2, 3, 4}

• IEEE C37.20.1 Standard for Metal-Enclosed Low-Voltage (1000 Vac and below, 3200 Vdc and below) Power Circuit Breaker Switchgear ²
• NEMA 250-2014 Enclosures for Electrical Equipment (1000 Volts Maximum) ²
• The Basics of Switchboards
• Rating of Ground Bus in Metal-Enclosed Switchgear
• Metal-Clad Switchgear or Metal-Enclosed Switchgear: Which Is It?
• Improving Safety with Arc-Resistant Switchgear

2. Inspection and Test Procedures

Apply visual and mechanical inspections ^{2, 3, 4}

• NFPA 70: Article 408 Switchboards, Switchgear, and Panelboards ^2 3 4
• NFPA 70: Article 110 Requirements for Electrical Installations: Working Space ^2 3 4
• NFPA 70B: Chapter 15 Substations and Switchgear Assemblies ^2 3 4
• Degradation of Power Contacts in Industrial Atmosphere: Silver Corrosion and Whiskers ³
• IEEE C37.20.6 Standard for 4.76 kV to 38 kV Rated Ground and Test Devices Used in Enclosures ⁴
• Top Five Switchgear Failure Causes and how to avoid them
• Condensation in Switchgear and Anticondensation Heaters
• Comparison of ANSI/IEEE Requirements for Low-voltage Switchgear

Employ methods and procedures for electrical tests ^{2, 3, 4}

• NFPA 70B: Chapter 11.23 Switchgear and Switchboard Assemblies ^2 3 4
• Switchgear and Switchboard Inspection and Testing Guide
• Inspection, Test and Measurement Procedures for LV and MV (up to 36kV) Switchgears
• Why is Continuous On-line Monitoring of Partial Discharge in the Switchgear Necessary?

3. Interpretation of Test Results

Evaluate results of electrical tests ^{2, 3, 4}

• NETA-ATS 2017: Section 7.1 Switchgear and Switchboard Assemblies ^2 3 4
• NETA-MTS 2019: Section 7.1 Switchgear, Switchboard, and Panelboard Assemblies ^2 3 4

Last Update: May 25, 2025