Underground line maintenance refers to work done on underground systems installed in conduit between manholes, and on underground residential distribution (URD) systems buried directly in the ground. This 57-minute DVD identifies some of the hazards found in and around underground work areas. It explains methods used to provide a safe work environment. It also describes the use of personal safety equipment and identify the safety considerations involved in a typical vault emergency.
Work Area Safety - 10 minutes
Describes personal safety equipment commonly used in underground and URD work areas.
Describes procedures for establishing and maintaining safe working conditions. Describes procedures for safely identifying circuits.
Tools and Test Equipment - 9 minutes
Describes the use of the following: pocket statiscope, phasing tool, remote cable spear, and remote cable cutter.
Shoring - 9 minutes
Identifies excavation conditions that require shoring. Describes the requirements for safely shoring trenches. Lists some safe alternatives to shoring.
Atmospheric Testing - 11 minutes
Identifies atmospheric hazards that may be found in vaults and enclosed spaces. Describes or demonstrates how to use an atmospheric test device to determine if the atmosphere in a vault is safe to breathe. Explains how to use ventilation equipment to supply fresh air to an enclosed area.
Respiratory Protection - 11 minutes
Describes the following types of respirators: half mask with cartridge filters, self-contained breathing apparatus, and demand air-line respirator. Describes how each respirator is inspected, put on, and adjusted for proper fit.
Vault Emergency - 7 minutes
Describes general safety considerations associated with responding to a vault emergency involving an unconscious worker.