GB/T 41091-2021 Guidance for electrical safety risk assessment and risk reduction in assembly occupancies
1 Scope
This document provides guidance on conducting electrical safety risk assessment and risk reduction in assembly occupancies, including general rules, implementation steps, identification of electrical safety factors, risk prediction, risk evaluation, risk reduction, and documents.
This document is applicable to the safety risk assessment and risk reduction of low-voltage electrical equipment and systems in assembly occupancies.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 4208-2017 Degrees of protection provided by enclosure (IP code)
GB/T 4776-2017 Electrical safety terminology
GB/T 22696 (All parts) Electrical equipment safety - Risk assessment and risk reduction
GB/T 22696.2-2008 Electrical equipment safety - Risk assessment and risk reduction - Part 2: Risk analysis and risk evaluation
GB/T 22697 (All parts) The risk assessment for the temperatures of hot surfaces of electrical equipments to be touched
GB/T 24612 (All parts) Requirements for electrical safety in the workplace
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 4776-2017 and GB/T 22696 (all parts) apply.
4 Overview
4.1 General rules
This document is based on the implementation steps of risk assessment, hazard sources of electrical equipment, risk reduction measures, etc. given in GB/T 22696 (all parts), combined with the basic characteristics of assembly occupancies and electrical safety risks, and supplement of relevant contents shall be considered.
4.2 Basic characteristics of assembly occupancies
Basic characteristics of assembly occupancies shall include but are not limited to the followings:
——major pedestrian movement;
——high personnel density;
——significant differences in personnel safety awareness, etc.
4.3 Electrical safety risk in assembly occupancies
The sources of electrical safety risks in assembly occupancies include (but are not limited to):
a) Due to the basic characteristics of assembly occupancies, there are risks resulting from direct or indirect contact between personnel and electrical equipment and systems, such as:
1) The contact between personnel and electrical equipment and systems is more frequent or the total duration is longer than that in general places;
2) Frequent and uncertain external forces from personnel cause sudden impacts on the electrical structure, mechanical structure, etc. of electrical equipment and systems;
b) Due to the basic characteristics of assembly occupancies, other risks arise, such as:
1) To meet the expected requirements, electrical equipment and systems are used at full load or even overloaded during certain periods of time;
2) The intrusion of solids, liquids and gases that affect electrical safety, etc.
5 Implementation steps
The risk assessment and risk reduction in this document is an iterative process of identification of electrical safety factors, risk prediction, risk evaluation, and risk reduction for assembly occupancies, and shall be implemented according to the following steps (see Figure 1) :
a) Determine the assessment object, namely the assembly occupancies;
b) Identify the electrical safety factors in assembly occupancies, and analyze potential hazards, hazardous situations and hazardous events;
Foreword i
Introduction ii
1 Scope
2 Normative references
3 Terms and definitions
4 Overview
4.1 General rules
4.2 Basic characteristics of assembly occupancies
4.3 Electrical safety risk in assembly occupancies
5 Implementation steps
6 Identification of electrical safety factors in assembly occupancies
6.1 General rules
6.2 Hazard source identification
6.3 Identification of safety factors related to personnel contact
6.4 Additional safety factors to be considered
7 Risk prediction
8 Risk evaluation
9 Risk reduction
9.1 General rules
9.2 Risk reduction measures
10 Documentation
Bibliography
