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- Types and construction - Confirm correct construction and ratings to meet specifications, standards, and project requirements. Determine and perform testing and inspection requirements.
- Basics of Switchboards Switchboards are built according to standards set by Underwriters Laboratory (UL 891) and the National Electrical Manufacturers Association (NEMA PB2). Basic requirements for switchboards are also covered in NEC Article 408.
- Basics of Motor Control Centers [PDF] In many commercial and industrial applications, quite a few electric motors are required, and it is often desirable to control some or all of the motors from a central location.The apparatus designed for this function is the motor control center (MCC).
- Switchgear and Switchboard Inspection and Testing Guide This guide provides a general overview for the inspection, testing and maintenance techniques used on switchgear and switchboard assemblies, and their associated components.
- Inspection, Test and Measurement Procedures for LV and MV (up to 36kV) Switchgears Important checks and maintenance for switchgear.
- Field Inspection and Testing of Medium-Voltage Motor Control Centres (MCCs) Important checks and maintenance for MCCs.
- NETA Tech Quiz: Switchgear & Circuit Breakers [PDF] These questions will help sharpen your knowledge on switchgear and maintenance.
- Metal-Clad Switchgear or Metal-Enclosed Switchgear: Which Is It? [PDF] Metal-clad switchgear is one of three common types of metal-enclosed switchgear, as defined in ANSI standards.
- Rating of Ground Bus in Metal-Enclosed Switchgear [PDF] All metal-enclosed switchgear built to ANSI standards is required to include a ground bus to connect together all items in the switchgear that are required to be grounded. The ground bus is rated for short-circuit and short-time duty.
- Condensation in Switchgear and Anticondensation Heaters [PDF] When condensation occurs in switchgear, there are very few surfaces where the result is not detrimental.
- Why is Continuous On-line Monitoring of Partial Discharge in the Switchgear Necessary? Periodic on-line PD test could miss significant PD activities since PD activities vary by time. On-line continuous monitoring eliminates the inherent flaw of interval-based testing.
- Comparison of ANSI/IEEE Requirements for Low-voltage Switchgear [PDF] This paper discusses and compares some of the major conformance testing and constructional differences between metal- enclosed switchgear designed in accordance with ANSI/IEEE standards with similar switchgear and controlgear equipment designed in accordance with IEC standards.
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