Okay, let's break down the permissibility of installing the fire pump service switch and meter in a separate room from the main electrical room, considering your location (NYC) and the NEC 2008 edition.

Answer

Yes, you can install the fire pump service switch and meter in a separate room from the main electrical room in your scenario, subject to specific requirements and approval by the Authority Having Jurisdiction (AHJ).

Explanation and Relevant Code Sections (NEC 2008)



Separate Service for Fire Pumps is Permitted

The NEC allows for a separate service for fire pumps. This is specifically intended to provide a highly reliable power source dedicated solely to the fire pump system.

NEC 2008 Article 695: Fire Pumps

This is the primary article governing fire pump installations. It addresses power sources, transfer equipment, overcurrent protection, and other critical aspects.

NEC 695.3 Power Source(s) for Electric Motor-Driven Fire Pumps

This section allows for various power source options, including normal and alternate. A separate service from the utility company would generally be considered the normal power source.

NEC 695.3(A)(1) Single Source

"A single source shall be permitted where it is of sufficient capacity to carry the fire pump load." In this case, Con Edison can provide an adequately sized separate service as a single source of power for the fire pump.

NEC 695.4 Continuity of Power

This is a critical section. It emphasizes the need for a reliable power supply. It says in part: "Circuits that supply electric motor-driven fire pumps shall be installed and routed in such a manner that they will not pass through areas exposed to physical damage, fire, fumes, or explosions." Separating the fire pump service enhances the reliability of the fire pump.

Key Considerations and Requirements


Approval by the AHJ (Authority Having Jurisdiction)

In NYC, this would typically involve the Department of Buildings (DOB) and possibly the Fire Department (FDNY). Any deviation from standard practice requires their explicit approval. Presenting a clear plan and rationale for the separate service location is essential.2.

Fire Resistance

The room housing the fire pump service equipment must have the required fire-resistance rating. This is to protect the equipment from fire damage and ensure its continued operation during an emergency. The required rating will be determined by the building code and the AHJ. This is especially important if the fire pump room is not directly accessible from the exterior of the building. Protecting the integrity of this space and service connection is crucial.3.

Physical Protection

The raceways (conduits) and wiring for the fire pump service must be protected from physical damage. This includes protecting them from impact, abrasion, and other potential hazards.

NEC 695.6 Power Wiring

Details the wiring method requirements to protect the wiring of the fire pump.4.

Overcurrent Protection

The overcurrent protective devices (fuses or circuit breakers) for the fire pump must be sized and installed according to NEC 695. The requirements are different from standard motor protection to ensure the pump operates even under overload conditions.
5.

Grounding

All electrical systems must be properly grounded.

Grounding does NOT necessarily need to be at one single location. Each service, including the fire pump service, requires its own grounding electrode system. NEC 250: Grounding and Bonding

This entire article is dedicated to grounding and bonding requirements.

NEC 250.24 Grounding Service-Supplied Alternating-Current Systems

Requires the service neutral conductor to be grounded at the service equipment.

NEC 250.50 Grounding Electrode System

Requires the connection to a grounding electrode system.

NEC 250.52 Grounding Electrodes

Lists acceptable grounding electrodes (e.g., metal water pipe, ground ring, concrete-encased electrode, ground rod).In summary, each service (main service and fire pump service) needs its own grounding electrode system and connection to the neutral conductor. They do not need to be connected together at one physical location.6.

Signage

Clear and permanent signage must be installed at each service disconnect, indicating that it serves the fire pump and providing instructions for operation.7.

Coordination

Close coordination with Con Edison, the electrical contractor, the fire protection engineer, and the AHJ is essential throughout the design and installation process.

Why This is Acceptable (and Sometimes Preferred)



Increased Reliability

A separate service for the fire pump isolates it from potential problems in the building's general electrical system. If there's a fault or outage in the main electrical room, the fire pump will still have power.

Code Compliance

The NEC recognizes the importance of fire pump reliability and provides allowances for separate services to achieve that goal.

Space Constraints

If the existing electrical room is genuinely too small, a separate location is a practical solution.

Important Reminders



NEC 2008 is the code you specified, but it's very old. NYC may have adopted a newer version of the NEC or have local amendments that supersede the NEC. Always confirm the current code requirements with the AHJ. NYC Local Law 141

Be aware that the FDNY has specific requirements for fire pump installations in NYC. You must comply with these requirements, which may be more stringent than the NEC.*

Always consult with qualified professionals: Engage a licensed electrical engineer and a qualified electrical contractor experienced with fire pump installations in NYC. They can ensure compliance with all applicable codes and regulations and obtain the necessary permits and approvals.In conclusion, installing the fire pump service switch and meter in a separate room is permissible under the NEC 2008 and potentially beneficial, but it requires careful planning, execution, and approval from the AHJ. Ensure all work is performed by qualified professionals and in full compliance with applicable codes and regulations. Flag for review