Equipment Group 400A: Specifications & Comparison Guide

Equipment Group 400A: Specifications & Comparison Guide When you're building or buying a Ford, you'll encounter alphanumeric Equipment Group codes like 400A, 401A, and 300A. These shorthand designations bundle standard and optional features into packages—but they can create confusion. The same code doesn't mean the same thing across models, and understanding what you're actually getting (or missing) requires reading between the lines of window stickers and order guides.

This guide covers what Equipment Group 400A includes on the Ford Explorer ST and Ford Mustang GT Premium, how it compares to 401A where applicable, and how to determine which group your vehicle has before you sign.

TLDR:

Equipment Group 400A means different things on different Ford models—it's the ST performance package on the Explorer and the GT Premium standard package on the Mustang
Explorer ST 401A was deleted for 2025; many former 401A features (360-degree camera, wireless charging, ambient lighting) are now standard in 400A
Mustang GT Premium still offers both 400A (standard) and 401A (high), with 401A adding memory seats, Co-Pilot360 Assist+, and premier trim accents
Check your equipment group on the window sticker, door jamb label, or by VIN lookup at ford.com

What Is Ford Equipment Group 400A?

What Is Equipment Group 400A?

In electrical distribution, "400A" refers to the amperage rating of a switchgear assembly — specifically, a low-voltage switchboard rated to handle 400 amperes of continuous current. Equipment Group 400A marks the entry point of the heavy-duty switchgear range, covering the configurations most commonly specified for mid-size commercial buildings, light industrial facilities, and power distribution panels feeding branch circuits or subpanels.

At 400A, a switchboard assembly typically includes:

Main breaker or main lugs configuration (field-selectable in most builds)
Multiple branch circuit positions for feeder and load distribution
Metering provisions and neutral/ground bus bars
UL 891 certification for low-voltage switchboard compliance
Bus ratings matched to 480V or 208V/120V system voltages

The 400A rating is not a single fixed product — it defines a capacity tier within which manufacturers configure assemblies to meet specific project requirements. Bus material (copper vs. aluminum), interrupt ratings, breaker types, and enclosure construction all vary based on application.

How 400A fits within the broader switchgear range:

DEI Power manufactures UL 891-certified switchboards from 400A through 4000A. The 400A group serves projects where load requirements don't demand larger gear but still require a certified, engineered assembly — not a standard panelboard. Typical applications include:

Secondary distribution in commercial office or retail buildings
Power feeds to mechanical rooms and HVAC equipment
Substation output panels in light industrial settings
Tenant metering and distribution in multi-unit facilities

Understanding where 400A sits in the capacity range helps engineers and contractors specify the right equipment from the start. Undersizing creates compliance and safety problems; oversizing adds unnecessary cost. Getting the ampacity tier right is the first decision in any switchgear specification.

Switchgear ampacity tier range from 400A to 4000A with typical applications

Equipment Group 400A on the Ford Explorer ST: Complete Feature Breakdown

⚠️ [REQUIRES FULL REWRITE — See issues_found for explanation. The placeholder content below is a structural draft only and must be verified against DEI Power's actual product documentation before publication.]