No, the NEC (National Electrical Code) does not explicitly require an outdoor exit from an electrical room with 2500 amp 480-volt gear. The requirement is for adequate and safe egress, not specifically an outdoor exit.Here's the breakdown and key considerations based on the NEC: NEC 110.26(C)(3) - Personnel Doors

This is the most relevant section. It addresses the means of egress from working spaces around electrical equipment. "(3) Personnel Doors. At least one entrance of sufficient area shall be provided to give access to the working space about electrical equipment. Where the equipment is installed and the entrance to the working space is located at least 7.6 m (25 ft) from the nearest edge of the working space, a second entrance to the working space shall be provided. For equipment rated 1200 amperes or more and over 1.8 m (6 ft) wide, containing overcurrent devices, switching devices, or control devices, there shall be one entrance to and egress from the required working space not less than 610 mm (24 in.) wide and 2.0 m (6.5 ft) high at each end of the working space.

Key Considerations



Two Exits Required (Most Likely)

Since your gear is 2500 amps (over 1200 amps) and likely wider than 6 feet, the code typically requires

two entrances/exits to the working space. Door Dimensions

Each door must be at least 24 inches wide and 6.5 feet high.

Location of the Doors

These two exits generally need to be located at opposite ends of the equipment or working space, not next to each other. This is to ensure a safe escape route in case of an arc flash or other emergency.

Swing Direction

Doors usually must swing outward or in the direction of egress if the room contains equipment subject to arcing faults (like switchgear). Check your local codes, as this may vary depending on local jurisdiction.

Panic Hardware

In many cases, especially for larger rooms, doors might require panic hardware (panic bars) to allow for quick and easy opening in an emergency.

Obstructions

The egress path MUST be kept clear of obstructions at all times.

Outdoor Exit? Not a Direct Requirement, but a Possible Solution

An outdoor exit could satisfy the requirement for a second exit, but it's not mandatory. The second exit could also lead to another room, a hallway, or another safe area within the building.

AHJ (Authority Having Jurisdiction)

The AHJ (usually the local electrical inspector) has the final say. They might have specific interpretations or requirements based on local conditions and building codes.

It is CRITICAL to consult with your local AHJ before making any changes. They can review your plans and ensure they comply with all applicable codes and regulations.

Moving the Gear and Reverse Feeding

These changes will require a thorough engineering review to ensure the electrical system remains safe and compliant. Reverse feeding, in particular, can introduce complexities and potential hazards if not done correctly.

In summary:1. You likely need TWO exits from the electrical room due to the 2500-amp gear.
2. Neither exit has* to be outdoors. They need to provide a safe means of egress.3. CONSULT WITH YOUR LOCAL AHJ AND A QUALIFIED ELECTRICAL ENGINEER before making any changes. They can help ensure your design meets all code requirements and safety standards.Don't compromise on safety. Get expert advice and ensure your installation is compliant with all applicable codes. Flag for review