Why is it important to provide adequate clearances to electrical distribution panels?

by Nils Deacon, Manager, Inspections and Rating Services

One of the most common hazards noted in insurance inspection reports is clutter around electrical distribution panels, also known as panel boxes. Panels are commonly located in basements or in equipment rooms away from main operating areas. They are often viewed by staff as additional storage space for files, tools, and other miscellaneous items. This inevitably leads to accumulations that can be a significant source of fuel in an electrical fire. “Combustible storage in electrical rooms or within required working clearances can increase fire severity and impede safe access for maintenance and emergency operations.” National Fire Protection Association (NFPA)

Combustible storage does not necessarily cause the fire, but it can significantly increase fire growth and loss severity if an electric arc-fault occurs.

Another important consideration is accessibility for required maintenance and emergency repairs.

The following requirements are for electrical installations operating at 1,000 volts or less. This covers the majority of properties that an inspection service such as MSO, Inc. would report on.

NFPA’s National Electrical Code (NEC) provides guidance for these issues. Clearance needed in front of the panel, also known as depth of working space, should be 3 feet. Around the panel – aka width of working space – is 30 inches. Height of working space is 6.5 feet.

From an underwriting perspective, a competent insurance inspection is important to be sure these guidelines are followed.

DISCLAIMER: This information reflects the interpretation of MSO, Inc. with regard to NFPA Standards and Codes and other code sources. It does not represent these codes’ official position on the items discussed.

Combustible storage in front of electrical distribution panel.