GB 3836.15-2024 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 3836.15-2024 | English | 755 |
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Explosive atmospheres - Part 15: Specification of electrical installations design, selection and erection
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| GB/T 3836.15-2017 | English | 1480 |
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Explosive atmospheres -- Part 15: Electrical installations design, selection and erection
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| GB 3836.15-2000 | English | RFQ |
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Electrical apparatus for explosive gas atmospheres. Part 15: Electrical installation in hazardous areas (other than mines)
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GB 3836.15-2024: Explosive atmospheres - Part 15: Specification of electrical installations design, selection and erection
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB3836.15-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.260.20
CCS K 35
Replacing GB/T 3836.15-2017
Explosive atmospheres - Part 15.Specification of electrical
installations design, selection and erection
Issued on. JULY 24, 2024
Implemented on. AUGUST 01, 2025
Issued by. State Administration for Market Regulation;
National Standardization Administration.
Table of Contents
Foreword... 3
Introduction... 7
1 Scope... 12
2 Normative references... 12
3 Terms and definitions... 12
4 General... 20
5 Design and selection of electrical equipment... 25
6 Equipment installation... 34
7 Additional requirements... 47
8 Initial inspection... 68
Appendix A (Informative) Hybrid mixtures... 70
Appendix B (Normative) Equipment initial inspection table... 72
Appendix C (Normative) Assessment of potential discharge risk of stator winding -
Ignition risk factor... 79
References... 80
1 Scope
This document specifies specific requirements for the design, selection, installation,
initial inspection of electrical installations in or related to explosive atmospheres.
This document applies to fixed, portable, mobile, individual electrical equipment.
This document does not apply to.
- Coal mines (the design, selection, installation of electrical equipment in coal mines
can refer to this document);
Note 1.For specific requirements, see the Coal Mine Safety Regulations.
- Dust environments formed by inherently explosive substances and explosives or
self-igniting substances (such as the manufacture and processing of explosives);
- Medical rooms.
Note 2.Appendix A provides additional guidance on the hazards of dust or flying catkins
mixed with flammable gases or vapors.
2 Normative references
The contents of the following documents constitute essential provisions of this
document through normative references in the text. Among them, for dated references,
only the version corresponding to that date applies to this document; for undated
references, the latest version (including all amendments) applies to this document.
GB/T 3836.1 Explosive atmospheres - Part 1.Equipment - General requirements
GB 3836.16 Explosive atmospheres - Part 16.Specification of electrical
installations inspection and maintenance
3 Terms and definitions
The terms and definitions defined in GB/T 3836.1, as well as the following terms and
definitions, apply to this document.
3.1 General
3.2 Hazardous areas
3.2.4
Hybrid mixture
A mixture of flammable gas or vapor and flammable dust.
3.2.5
Maximum permissible surface temperature
The maximum temperature that the surface of electrical equipment is allowed to
reach in order to avoid ignition in actual operation.
Note. This definition applies only to dust and not to gas. Whether it is a dust cloud or a dust
layer, its maximum permissible surface temperature depends on the type of dust, including
the thickness of the dust layer and the safety factor applied (see 5.4.3).
3.6 Pressurized enclosure
3.6.1
Pressurized enclosure "p"
An enclosure that keeps the internal shielding gas pressure higher than the external
atmospheric pressure, to prevent the external atmosphere from entering.
4 General
4.1 General requirements
The design, selection, installation of electrical equipment in hazardous areas shall
comply with the provisions of this document.
4.2 Documents
Verification dossier shall be established for all electrical equipments, indicating the
information of the manager of the verification dossier, the storage location, etc., so that
they can be checked at any time when needed. The verification dossier shall include at
least the following information or documents.
4.3 Equipment qualification guarantee
4.4 Personnel competence and qualifications
4.4.1 General
The design, selection, installation of electrical installations covered by this document
shall only be carried out by professionally trained personnel whose knowledge, skills,
qualifications shall comply with the provisions of this clause and shall be appropriate
to the type of work performed.
Personnel shall receive appropriate training and continuing education on a regular basis.
4.4.2 Knowledge and skills
4.4.3 Qualifications
4.4.3.1 General
Different explosion-proof categories require different explosion-proof knowledge. The
personnel's ability shall be consistent with the category of explosion-proof technology
that needs to be mastered; the specific ability requirements of relevant personnel shall
be clarified.
4.4.3.4 Operators/technicians
The operator/technician shall be able to provide proof of competence, to prove that
he/she has met the knowledge and skills requirements specified in 4.4.2.3 related to the
explosion-proof type and/or the type of equipment involved. At the same time,
documents shall be provided to prove the ability to perform the following tasks.
4.4.4 Assessment
The ability of the person in charge, operator, designer shall be assessed according to the
time period required by the standard or the user, to fully prove that they have the
following conditions.
5 Design and selection of electrical equipment
5.1 Document requirements
In order to select electrical equipment suitable for hazardous areas, the following
documents are required.
5.2 Design and selection based on EPL
5.2.1 General
When new devices or equipment are used, the compliance of the equipment shall be
verified in accordance with 4.3.The EPL in the area classification document shall
follow the relationship between EPL and area in Table 1.
5.3 Design and selection according to equipment category
Electrical equipment shall be selected according to Table 3.
5.4 Design and selection based on the ignition temperature of gas, vapor or dust
and ambient temperature
5.5 Design and selection including external influences
When the equipment needs to meet other environmental conditions, such as waterproof,
dustproof, corrosion-resistant, low temperature, high temperature, high altitude, etc.,
other protection requirements shall be adopted and verified by relevant tests.
5.6 Design and selection of specific equipment
5.6.2 Rotating motor
5.6.3 Lamps
The type or rating of the lamp shall be selected according to the required temperature
group. "e" type lamps with fluorescent lamps and electronic ballasts shall not be used
in places requiring temperature group T5 or T6, or places where the ambient
temperature is greater than 60 °C.
5.6.4 Plug and socket terminals
Plug and socket terminals shall not be installed in places requiring EPL Ga and Da.
In places requiring EPLDB and Dc, the installation of the socket terminals shall not
allow dust to enter the socket regardless of whether the plug is installed in the socket.
The installation angle of the socket terminals shall not exceed 60° from the vertical line,
meanwhile the opening shall be downward.
5.6.5 Batteries and battery packs
Batteries and battery packs shall only be charged in non-hazardous areas, unless
charging in hazardous areas is permitted in the certificate and manufacturer's
instructions.
6 Equipment installation
6.1 Prevention of dangerous (ignitable) sparks
6.1.1 Light metal structural materials
The composition of metal installation materials (such as cable trays, mounting plates,
weather shields and enclosures) shall comply with the requirements of Table 5.
6.1.2 Hazards of live parts
Inadvertent contact with exposed live parts shall be prevented, except for parts of a
single intrinsically safe circuit.
6.1.3 Hazards of exposed external conductive parts
6.1.4 Equipotential bonding
6.1.5 Static electricity
6.1.5.1 General
External non-metallic materials, which are used for structural or protective purposes
and not part of explosion-proof electrical equipment (such as plastic-coated cable trays,
plastic mounting plates, plastic guards and enclosures), shall be anti-static.
6.1.6 Cathodic protection of metal parts
Metal parts in locations requiring EPL Ga or Da levels shall not be cathodically
protected, unless they are specifically designed for this application.
6.2 De-energizing and galvanic isolation
6.2.1 Overview
The requirements of 6.2 do not apply to intrinsically safe circuits.
6.3 Cables and wiring systems
6.3.2 Cables
6.3.3 Conduit system
Conduit seals shall be provided where the conduit enters or leaves the hazardous area.
There shall be no joints, pipe joints or other accessories between the seal and the
boundary of the hazardous area.
6.3.4 Installation requirements
6.3.4.1 Circuits passing through hazardous areas
When a circuit passes through a hazardous area from a non-hazardous area to another
non-hazardous area, the wiring system in the hazardous area shall be compatible with
the EPL requirements of the hazardous area.
6.4 Cable entry system and plugging elements
6.4.1 General
The selection of cable entry devices and plugging elements shall be consistent with the
equipment manual and explosion-proof certification requirements.
7 Additional requirements
7.1 Additional requirements for flameproof enclosure "d"
7.1.1 Equipment for specific gases
Equipment marked for specific gases, or equipment marked with equipment category
and specific gases, when used in specific gas environments, shall be installed in
accordance with the requirements for specific gas equipment category. For example,
equipment marked "IIB + H2" for hydrogen environments shall be installed as IIC
equipment.
7.1.3 Protection of flameproof joint surfaces
The flameproof joint surfaces shall be protected in accordance with the manufacturer's
documents. Gaskets are permitted only if specified in the manufacturer's documentation.
Flameproof joint surfaces shall not be painted.
7.1.4 Conduit system
The flameproof seal of the conduit shall be one of the following types.
7.2 Additional requirements for increased safety type "e"
For the combination of terminals and conductors in general terminal boxes and junction
boxes, it shall be ensured that the heat caused by the power loss in the enclosure does
not cause the temperature to exceed the temperature group specified for the equipment.
One of the following measures can be taken.
7.3 Additional requirements for intrinsically safe type "i"
7.3.1 Installations complying with EPL Gb or Gc and Db or Dc
7.3.3 Simple devices
Simple devices are not related to the equipment protection level. Simple devices shall
be clearly marked by adding durable labels.
7.3.4 Junction box
8 Initial inspection
After the electrical installation is completed and before the first use, the selection and
installation of the equipment shall be initially inspected in accordance with Appendix
B.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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