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GB/T 24612.1-2009 (GB/T24612.1-2009)

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GB/T 24612.1-2009: PDF in English (GBT 24612.1-2009)
GB/T 24612.1-2009
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.030
K 09
Requirements for electrical safety in the workplace -
Part 1. General rules
ISSUED ON. NOVEMBER 15, 2009
IMPLEMENTED ON. MAY 01, 2010
Issued by.
General Administration of Quality Supervision, Inspection
and Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
Table of Contents
1 Scope ... 3 
2 Normative references ... 3 
3 Terms and definitions ... 4 
4 Responsibilities ... 5 
5 Relationship between organization and personnel ... 5 
6 Training management ... 6 
7 Electrical safety procedure... 7 
8 Working on live conductor or circuit part or near ... 8 
9 Application of electrical equipment ... 10 
10 Application of other electrical equipment ... 11 
Bibliography ... 13 
Requirements for Electrical Safety in the Workplace –
Part 1. General rules
1 Scope
This Part of GB/T 24612 specifies the basic safety requirements that the application site of
electrical equipment shall meet.
Note. The application of electrical equipment refers to the safety requirements which shall be noticed
during the use and maintenance periods after the electrical equipment is manufactured according to the
electrical safety requirements. The application is closely linked with the site, so the safety requirements
may be involved with the necessary requirements of site.
Generally, the person who works on or near the exposed live parts or circuit parts shall be
restricted. Regardless whatever conditions, the safety of person shall be ensured when
he/she approaches or touches the exposed live parts or circuit parts. This Part mainly
specifies the relevant requirements and regulations.
This Part is applicable to the electrical equipment which is used or maintained during its
life cycle after it is manufactured according to the electrical safety requirements .
This Part is aimed to provide the safety assurance related to electrical hazards for the
person who works on or near the exposed live parts or circuit parts.
Note. Most of the requirements in this Part are based on the view of manufacturing to assure the safety of
application of electrical equipment.
2 Normative references
The articles contained in the following documents have become the articles of this Part
when they are quoted in this Part of GB/T 24612. For the dated documents so quoted, all
the subsequent modifications (including all corrections) or revisions made thereafter do
not apply to this Part. However, the parties who reach an agreement according to this Part
are encouraged to study whether the latest versions of these documents may be used.
For the undated documents so quoted, the latest versions (including all modification
sheets) apply to this Part.
GB 3805-2008 Extra-low voltage (ELV) - Limit values
GB 13955 Installation and operation of residual current operated protective devices
GB 19517-2009 National safety technical code for electric equipments
GB/T 24612.2-2009 Requirements for electrical safety in the workplace - Part 2. Safety
measure of operation on power off
3 Terms and definitions
3.1
skilled person
Person who has received professional education and has experiences, and is able to
recognize risks and avoid electrical hazards
Note. To evaluate the professional education degree, multiple-years’ practical activities in the technical
fields may be counted. [GB 19517-2009, Annex B, B.14].
3.2
instructed person (electrically)
Be able to recognize the risks and avoid electrical hazards under the suggestion or
supervision of skilled electrical technicians [GB 19517-2009, Annex B, B.15].
3.3
unskilled person
Neither skilled person nor the person who has received the primary training [GB
19517-2009, Annex B, B.16].
3.4
electrical safety work condition
A status where the energized parts at or near the installation sites of conductor or
electrically conductive parts are isolated, the locking and labeling are at the regulated
status, and the site is tested as no voltage and grounded as regulated.
3.5
limited approach boundary
Limitation on the distance to approach the exposed live parts, within such distance
boundary there exists electric shock hazards.
3.6
energized part
The electrical safety procedure shall determine the contents of works on the live parts with
the working voltage equal to or above voltage limit or the contents of works in the
environment where there possibly occurred electrical hazards before official working.
7.6 Electrical hazard/risk evaluation procedure
The evaluation steps for electrical hazards/risks shall be determined in the electrical
safety procedure. These steps shall be used in the environment where a person works on
or near the live parts of which the working voltage is voltage limit or above, OR there
exists electrical hazards before work is started.
7.7 Working procedure
7.7.1 General
Before each-item work, the responsible-person shall give a brief introduction on the
working contents to the relevant personnel. The brief introduction on the work shall
include the following contents. electrical hazards related to the work, working procedure,
special preventive measures, energy control and materials required for personal
protection.
7.7.2 Repeated or similar working tasks
If works or operations are repeated or similar on the working day or at the working shift,
before the working day or before the first work of the shift, it shall at least give a brief
introduction to the working contents. If there are significant changes occurred during
working that may influence the personnel safety, additional introduction shall be given.
7.7.3 Routine work
If executing routine works, and the relevant staffs may identify and avoid the danger
related to the work through training and experiences, then a brief discussion before work
may satisfy it. In case of one of the following conditions, more detailed discussion shall be
held.
— Work that is complicated or has special hazards;
— It is predicted that hazards cannot be recognized and avoided by the relevant staffs.
8 Working on live conductor or circuit part or near
8.1 General
When the staff works on or near the exposed live or energized conductors or circuit parts,
he/she shall follow the electrical safety standard to protect him/her from hurting. The
detailed safety standard shall be adaptive to the corresponding nature and degree of
8.2.2 Electrical work permit for live parts
When the live parts are not under the electrical safety work conditions, the ongoing works
shall be considered as the electrical works for the live parts. Only the skilled staff with the
written permit can conduct such operation.
Note. Due to the additional hazards or other conditions (e.g. additional hazards caused by power-off, or
power cannot be cut off due to the design of equipment or operation limitation etc. shall be specified), the
live parts may be possibly not under the electrical safety work conditions.
8.2.3 Restriction of the unskilled staff
The unskilled staff is not allowed to enter the places where only the skilled person can
enter, unless electric conductor and equipment are at the electrical safety work conditions.
8.2.4 Safety interlock
Only when the skilled person works on the electrical equipment conforming to the
following requirements, it is allowed to undo or bypass the independently controlled safety
interlock device of electrical equipment. After the completion of work, the safety interlock
system of electrical equipment shall return to its working status.
a) People shall insulate or isolate the live parts of which the working voltage is voltage
limit or above. Any part of the body of person shall not pass the limited boundary of
working area.
Note. When measures are taken for the energized parts under working status, insulating gloves
and casings shall be used.
b) The live parts of which the working voltage is voltage limit or above shall be isolated
from human body or other conductors with different electrical potentials.
c) When the person conducts phase-line work with bare-hands, he/she shall be
isolated from other conductors.
9 Application of electrical equipment
The detailed safety measures for the operations under power-off condition shall comply
with the relevant regulations in GB/T 24612.2-2009.
The detailed safety measures for the operations under power-on condition are under
consideration.
10 Application of other electrical equipment
10.1 Testing instruments and equipment
10.1.1 Adjustment
Testing instruments, equipment and accessories shall be able to be adjusted to the rated
values based on their connected circuits and equipment.
10.1.2 Design
Testing instruments, equipment and accessories shall be designed according to their
working environment and use methods.
10.1.3 Visual inspection
Before using testing instruments, equipment AND all testing conductors, wires, pow...
......
 
(Above excerpt was released on 2016-02-15, modified on 2021-06-07, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/GBT24612.1-2009