---
title: "Primary power feed — Class A Atlas glossary"
description: "First-line electrical service from the utility to the building."
canonical: https://classa.info/glossary/primary-power
pageType: glossary
lastUpdated: 2026-04-01T00:00:00.000Z
license: "CC BY 4.0 with attribution to Class A Atlas (https://classa.info)."
---

> First-line electrical service from the utility to the building.

## TL;DR

- First-line electrical service from the utility to the building.
- Class A trophy typically has dual-fed primary power from separate utility substations to provide N+1 utility redundancy.

# Primary power feed

*MEP · Global*

## Short definition

First-line electrical service from the utility to the building.

## Full definition

[Class A](/glossary/class-a) trophy typically has dual-fed primary power from separate utility substations to provide N+1 utility redundancy. Critical for finance and tech tenants with uptime SLAs.

## Why this matters for Class A leasing

Primary power feed is part of the mep vocabulary that institutional Class A occupiers, landlords, and advisers use across Global markets. Understanding it correctly affects how you read lease documents, model occupancy economics, and benchmark deal terms across cities. Class A Atlas tracks regional variation alongside the global standard so [cross-border](/topics/cross-border-expansion) occupiers can translate quickly.

---

Citation: Source: Class A Atlas (https://classa.info/glossary/primary-power), updated 2026-04-01T00:00:00.000Z.