MIL-HDBK-1025/10
5.1.2.3 Number of Qualified Workers Per Hazard Exposure. OSHA
standard 29 CFR 1910.269 requires more than one worker where the hazard exposure of
the work is considered to be significantly reduced by the presence of additional workers.
Tables 13 and 14 cover these requirements. Table 15 indicates acceptable work where
only one worker is needed. These tables cover the minimum number of workers required;
more workers may be necessary to provide safe working conditions in some
circumstances.
Table 13
Jobs Requiring Two Electrical Workers
Hazard exposure
Working on
I. Energized lines
Installation, removal, or
II. De-energized lines with possible energized parts contact
repair when working on or III. Equipment with possible energized line contact
near lines or parts energized
at more than 600 volts ac or IV. Mechanical equipment operation (except insulated aerial
lifts) near energized parts
250 volts dc
V. Other work with equal or greater hazard exposure
Table 14
Jobs Working in Confined Spaces
Requiring Additional Workers
Hazard exposure
Additional worker requirement
1. An attendant with first-aid and CPR training will be
available on the surface in the immediate vicinity.
2. If a hazard exists within the space, or a hazard exists or is
created because of traffic patterns outside the space, the
attendant may not enter the confined space.
Installation, removal, or repair 3. If the restrictions of Item 2 above do not apply, the
attendant may enter the confined space to provide
when working in a confined
assistance, but only for a brief period (other than in an
space. Manhole or vault
emergency). For extended periods of assistance, a
requirements are generally
second worker in addition to the attendant is required.
classified as confined spaces.
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