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FEEDER DISTRIBUTION

Retail center radial feeder distribution single line diagram

This feeder distribution single line diagram shows a retail center supplied from a 12.47 kV utility service through a 2000 kVA pad-mounted transformer. A 3000 A main breaker feeds a 480Y/277 V retail bus. Separate feeders supply a grocery tenant, restaurant tenant, central rooftop HVAC plant, and site lighting with signage.

UPDATED 2026-09-23
TYPESld
USE-CASEFeeder Distribution
EXAMPLERetail center radial feeder distribution single line diagram
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CASE ANALYSIS

Scenario

This radial system distributes one transformer secondary to separately metered tenants and shared retail-center services.

Key decisions

  • Service capacity: A 2000 kVA transformer feeds the 480Y/277 V retail bus.
  • Tenant metering: Grocery and restaurant feeders have individual demand meters.
  • Shared HVAC: A central 600 A feeder supplies rooftop HVAC equipment.
  • Site services: Parking and signage are isolated on their own feeder.

When to reuse this

Use this for a small retail center with common-area services and tenant billing. Utility meter location and tenant-service requirements vary by jurisdiction.

FAQ

Frequently asked questions

Why are tenant demand meters shown?01
They make separate tenant energy measurement visible in the distribution topology.
Are tenant meters always installed after the main bus?02
The required metering arrangement depends on the utility, lease structure, and local code.
Why is HVAC separate from tenant loads?03
Central plant equipment is commonly a shared landlord service rather than a tenant branch.
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