Los Angeles County Municipal Code § 603.4 Working space and clearances

Working space around electrical equipment shall be provided in accordance with Section 110.26 of the California Electrical Code for electrical equipment rated 1,000 volts or less, and Section 110.32 of the California Electrical Code for electrical equipment rated over 1,000 volts. The minimum required working space shall be not less than 30 inches (762 mm) in width, 36 inches (914 mm) in depth and 78 inches (1981 mm) in height in front of electrical service equipment. Where the electrical service equipment is wider than 30 inches (762 mm), the minimum working space shall be not less than the width of the equipment. Storage of materials shall not be located within the designated working space.

The code official is authorized to require the installation, painting, and/or placement of approved physical markers, and verbiage as deemed necessary, by which to visually designate the area to be maintained clear of storage.

Doors into electrical control panel rooms shall be marked with a plainly visible and legible sign stating "ELECTRICAL ROOM" or similar approved wording. The disconnecting means for each service, feeder or branch circuit originating on a switchboard or panelboard shall be legibly and durably marked to indicate its purpose unless such purpose is clearly evident.

Where buildings or structures are supplied by more than one power source, markings shall be provided at each service equipment location and at all interconnected electric power production sources identifying all electric power sources at the premises in accordance with the California Electrical Code, and other requirements of the fire authority. See Section 509, et seq.

For the purposes of Sections 509 and 603, both an energy storage system (ESS) and a photovoltaic (PV) system shall each be considered an electrical power source, with electrical service equipment, and an electrical hazard.

604 - ELEVATOR OPERATION, MAINTENANCE AND FIRE SERVICE KEYS