Energy Sources & Other Hazards

When performing work in confined spaces, workers should either shut down (de-energize) all energy sources so as not to generate flame or electricity, or isolate them so that any energy created cannot be conducted to any other location in the confined space. The following types of energy sources may present hazards in confined spaces:

• Electrical
• Mechanical
• Hydraulic
• Pneumatic
• Chemical
• Thermal

There are countless other hazards to consider during the evaluation of a confined space before beginning work, as follows:

• Be sure no loose dirt or liquid is present in the space. These substances increase the risk of suffocation or drowning, especially in a sudden collapse of a wall or barrier.
• Where possible, stop the flow of liquid or gas through pipes by disconnecting the supply entirely or by inserting barriers in the pipes to stop the flow.
• Where possible, insert barricades between workers and any substances that may flow into the space.
• Always ensure that the exit is accessible and large enough for workers to escape during an emergency.

To learn more about Confined Spaces visit our Canada Confined Space Online Training web page.