California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 5 - Electrical Safety Orders
Group 1 - Low-Voltage Electrical Safety Orders
Article 4 - Requirements for Electrical Installations
GENERAL
Section 2340.16 - Work Space About Electric Equipment
Current through Register 2024 Notice Reg. No. 38, September 20, 2024
(a) Space about electric equipment.
Sufficient access and working space shall be provided and maintained about all electric equipment to permit ready and safe operation and maintenance of such equipment.
(b) Work Space. Working space for equipment likely to require examination, adjustment, servicing, or maintenance while energized shall comply with the following dimensions, except as required or permitted elsewhere in these Orders.
Distances shall be measured from the live parts if they are exposed or from the enclosure front or opening if they are enclosed.
In all cases, the workspace shall be adequate to permit at least a 90 degree opening of equipment doors or hinged panels.
Table 2340.16 . Minimum Depth of Clear Working Space at Electrical Equipment, 600 V or Less
Nominal |
Minimum Clear Distance |
||||||
Voltage to | Condition 1 | Condition 2 | Condition 3 | ||||
Ground | Feet | Meters | Feet | Meters | Feet | Meters | |
0-150 | 3* | 0.9 | 3* | 0.9 | 3 | 0.9 | |
151-600 | 3* | 0.9 | 3.5 | 1.0 | 4 | 1.2 |
Notes to Table 2340.16:
Where the "Conditions" are as follows:
Condition 1--Exposed live parts on one side and no live or grounded parts on the other side of the working space, or exposed live parts on both sides effectively guarded by suitable wood or other insulating materials. Insulated wire or insulated busbars operating at 300 volts or less shall not be considered live parts.
Condition 2--Exposed live parts on one side and grounded parts on the other side. Concrete, brick, or tile surfaces shall be considered as grounded surfaces.
Condition 3--Exposed live parts on both sides of the work space (not guarded as provided in Condition (1)) with the operator between.
EXCEPTIONS:
(c) Clear Spaces. Working space required by this section shall not be used for storage. When normally enclosed live parts are exposed for inspection or servicing, the working space, if in a passageway or general open space, shall be suitably guarded.
(d) Entrance and Access to Workspace. At least one entrance of sufficient area shall be provided to give access to the working space about electric equipment.
(e) Illumination. Portable or fixed illumination, suitable for the nature of the work being performed, shall be provided when working on electrical equipment. The light fixtures and their control points shall be so arranged that persons operating light switches, replacing lamps or making repairs on the lighting system will not be endangered by energized parts of other equipment.
EXCEPTION: Additional lighting fixtures are not required where the working space is illuminated by an adjacent light source. In electric equipment rooms, the illumination may not be controlled by automatic means only.
(f) Headroom. The minimum headroom of working space about service equipment, switchboards, panelboards and motor control centers, which require manual operation or where there are energized parts exposed at any time, shall be as follows:
(g) For installations built on or after May 5, 2008, switchboards, panelboards, and distribution boards installed for the control of light and power circuits, and motor control centers shall be located in dedicated spaces and protected from damage.
NOTE to subsection (g)(1): A dropped, suspended, or similar ceiling that does not add strength to the building structure shall not be considered a structural ceiling.
1. Repealer and new section filed 3-23-79; effective thirtieth day thereafter (Register 79, No. 12). For history of former section, see Register 75, No. 42.
2. Amendment of Table 2340.16 and Plate 2340.16(a)(1) filed 2-1-83; effective thirtieth day thereafter (Register 83, No. 6).
3. Editorial correction filed 11-2-83 (Register 83, No. 45).
4. Editorial correction of Table 2340.16 filed 11-3-83 (Register 83, No. 45).
5. Amendment of Table 2340.16, subsections (c)-(f) and Plate 2340.16(a)(2) filed 8-27-86; effective thirtieth day thereafter (Register 86, No. 37).
6. Amendment of section, repealer of Plate 2340.16(a)(2), and amendment of NOTE filed 5-5-2008; operative 5-5-2008. Submitted to OAL for printing only pursuant to Labor Code 142.3(a)(3) (Register 2008, No. 19).
7. Amendment of subsection (b)(2), repealer of subsections (b)(2)(A)-(B) and amendment of subsection (b)(3) filed 4-6-2010; operative 5-6-2010 (Register 2010, No. 15).
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.