A 208Y/120 V branch circuit can carry three phases and a shared neutral to 120 V outlets in a rack (White Paper 38, p. 5). A published case study calls neutral oversizing of 170% to 200% an unnecessary cost, and says legacy design practices should be updated (White Paper 38, p. 12). It measured a…
Category: Articles
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Last updated: 2026-10-30 ERCOT’s NOGRR282 has been in effect since 2026-08-01 (ERCOT NOGRR282). The Public Utility Commission of Texas approved it on 2026-07-09 (PUCT report). It adds two new sections to the Nodal Operating Guide, 2.6.4 for frequency and 2.15 for voltage (PUCT report). The ERCOT issue page lists the voltage section as 2.14, but…
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The Pentagon is preparing major military bases in the continental United States to sustain essential operations on their own for at least 90 days, Fox News Digital reported on 25 October 2026 from documents it reviewed. The requirement sits under FORTRESS America, a program the Secretary of War established in a memo dated 30 September…
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A data center that drops off the grid during a fault is now a regulatory matter in Texas, and national rules are on their way (ERCOT, FERC). Three rules changed in 2026. FERC ordered NERC on 2026-07-16 to file national standards for computational loads (FERC). ERCOT’s NOGRR282 has been in force since 2026-08-01 (ERCOT). NERC’s…
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CLO-001-1, CLO-002-1 and CLO-003-1 are three NERC Reliability Standards for data centers and similar sites, adopted by NERC’s Board and awaiting FERC approval. They cover interconnection studies and modeling data (001), operating data and communications (002), and protection coordination and disturbance recording (003). Each applies to Computational Load Sites with a total load of 50…
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Last updated: 2026-10-29 Computational loads are not subject to NERC Reliability Standards today (PJM Inside Lines, 2026-08-11). NERC’s Board adopted CLO-001-1, CLO-002-1 and CLO-003-1 on 2026-10-26, and NERC lists all three as pending regulatory filing (NERC One Stop Shop workbook, NERC newsroom, 2026-10-27). FERC set 2026-12-31 as the filing deadline (FERC order, Docket RD26-7-000). In…
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A motor runs at a lagging power factor because its current is delayed from the voltage. A capacitor runs at a leading power factor because its current comes earlier than the voltage (maker’s paper, p. 4). NERC says some large loads “are capacitive loads and operate at a leading power factor,” because their power electronics…
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Yes, by the mechanism NERC describes. Its July 2025 white paper names uninterruptible power supply (UPS) units and power supplies in IT equipment, and variable speed drives in cooling, as examples of data center harmonic sources (NERC white paper, p. 33). All three are power electronics (NERC, p. 33). The paper gives no harmonic figure…
