• Working closer than the Table A distance is allowed under three conditions: the work is impossible otherwise, the line can’t be de-energized, and an expert determines a minimum distance that’s specific to the site.

There are requirements in place to protect employees from contact with power lines. The requirements consist of prerequisites and criteria that apply when work must be done closer than the minimum clearance distance specified in Table A of 1926.1408.

Working closer than the minimum approach distance allowed in Table A is highly discouraged.

However, there is an exception if the following three requirements are met:

1. The employer determines it is not possible to do the work without breaching the minimum approach distance in Table A.
2. The employer determines after consultation with the utility owner/operator that it is not possible to de-energize and ground the power lines.
3. The power-line owner/operator or a registered professional engineer (who is a qualified person with respect to electrical power transmission and distribution) determines the minimum clearance distance that must be maintained to prevent electrical contact, specific to on-site conditions. Some factors that must be considered include:
   • Conditions affecting atmospheric conductivity;
   • Time necessary to bring the equipment, load line, and load (including rigging and lifting accessories) to a complete stop;
   • Wind conditions;
   • Degree of sway in the power line;
   • Lighting conditions; and
   • Other conditions affecting the ability to prevent electrical contact.

The next step is to have a planning meeting that includes the employer and utility owner/operator to determine the procedures that will be followed to prevent electrical contact and electrocution. At a minimum, there are 12 procedures that must be included, per 1926.1410(d)(1) through (d)(12), and these procedures must be documented and immediately available on-site.

Traveling under or near power lines with no load

Equipment traveling under or near power lines with no load is covered at 1926.1411. The minimum clearance distances in Table T must be maintained. For traveling in poor visibility, a dedicated spotter should be used if needed, along with additional precautions.