Approved Code of Practice and National Occupational Standards

Introduction to Codes and Standards

Let's delve into the essential codes and standards that govern working in confined spaces.

Approved Code of Practice

The Approved Code of Practice (ACOP) holds special legal status, endorsed by the Health and Safety Executive (HSE).

National Occupational Standards (NOS)

One crucial standard is the National Occupational Standards for Working in Confined Spaces: Water, established in 2009 by the water industries.

Types of Entries

The NOS categorises confined space entries into the following codes:

• NC1: Low-risk, shallow entry with adequate ventilation and simple access.
• NC2: Vertical access with mechanical rescue device attachment, such as a man-riding winch.
• NC3: Working away from entry point without continuous safety line attachment.
• NC4: Non-standard entry with complex operations and high-risk factors, requiring specific controls and rescue arrangements.

Application Across Industries

While initially applied in the water industry, HSE recommends all industries adopt the NC1 to NC4 classifications for confined space entries.

Implementation and Procedures

Implementing these standards involves:

• Ensuring documentation and permits are in order.
• Conducting atmospheric testing and ensuring communication checks.
• Verifying safety equipment and conducting a toolbox talk.
• Establishing procedures for safe entry, exit, and monitoring by a safety attendant.

Dynamic Risk Assessment

Due to the changing nature of confined space conditions, a Dynamic Risk Assessment (DRA) is essential:

• Adjusting classifications and procedures as conditions change.
• Transitioning between NC classifications based on evolving risk factors.

By following these guidelines and conducting regular DRAs, organisations can ensure safe practices in confined space operations.