What it is
A 1995 EC&M article defining power distribution equipment categories including switchgear, switchboards, panelboards, transfer switches, and substation equipment. Describes voltage segmentation from medium voltage (4.16-34.5kV) to utilization voltage (120V-480V) for residential, commercial, and industrial applications.
Why it matters
This is a dated reference document providing equipment definitions and voltage ranges. While it covers categories relevant to facilities and electrical contractors (switchgear, substations, transfer switches), the 1995 publication date and lack of constraints, standards updates, or deployment context make it insufficiently actionable for current FMP practitioners facing modern code, monitoring, or resilience requirements.
Evidence from source:
- Medium voltage service at 4.16, 13.8, or 34.5kV for larger industrial/commercial users
- Utilization voltages: 208Y/120V or 480Y/277V for commercial/industrial; 120/240V single-phase residential
- Equipment types: metalclad switchgear using SF6 or air breakers, unit substations, molded-case circuit breakers
Links
- Canonical source: https://www.ecmweb.com/content/article/20891566/power-distribution
- Topic: /topics/power-quality-surge/
- Topic: /topics/reliability-uptime/
Open questions
- What modern standards (NEC 2023/2026) have changed MV/LV segmentation or transfer switch requirements since 1995?
- How do current monitoring and telemetry requirements affect switchgear and substation design compared to this baseline?