GB 16895.3-2004 Electrical installations of buildings Part 5-54: Selection and installation of electrical equipment - Grounding arrangements, protective conductors and protective bonding conductors
Some standard content:
ICS 91. 140. 50
National Standard of the People's Republic of China
CB 16895. 3—2004/IEC 60364-5-54:2002 replaces (B16895.3—1997
Electrical installations of buildings
Part 5-54.: Selection and erection of electrical equipment-Earthing arrangements . protective conductors and protective bonding conductors conductors(IEC60364-5-54:2002,IDT)
2004-05-14 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Standardization Administration of the People's Republic of China
2005-02-01 Implementation
Normative references
542 Grounding configuration
General requirements
542.2 Grounding electrode
542.3 Grounding conductor
542.4 Main grounding terminal
543 Protective conductor
543.1 Minimum cross-sectional area
Type of protective conductor
Electrical continuity of protective conductor
543.4 PEN conductor
513.5 Protective function common grounding
548.6 Configuration of protective conductor
Total 43.7 Protective conductor self-flowing reinforced protective conductor with a length of more than 10m4 South 44 Protective bonding conductor (equipotential bonding conductor) 844.1 Flash protection bonding conductor connected to the main grounding terminal 44.2 Protective bonding conductor used as auxiliary bonding GD 16B95.3-2004/IEC 60364-5-54:2002 Appendix A (Normative Appendix) 543.1.2 Calculation method of coefficient k (also applicable to 1EC60724 and [EC50949] Appendix (Informative Appendix) Description of grounding configuration, protective conductor and protective bonding conductor Table 54.1. Considering the corrosion and mechanical strength, the minimum size of the grounding electrode of common materials buried in the soil Table 54.2 Minimum cross-sectional area of the grounding conductor buried in the soil 1
Table 54. 3 Minimum cross-sectional area of protective conductor Table A.54.2 Parameter values of insulated protective conductors that are not cable cores and are not installed in bundles with other cables Table A.54.3 Bare protective conductors that are in contact with the cable sheath but are not installed in bundles with other cables Table A.54.4 Bare protective conductors that are cable cores or are installed in bundles with other cables or insulated conductors Table A.54.5 Metal sheaths of cables, such as armour, metal sheaths, concentric conductors, etc. as protective conductors Table A.54.6 Bare conductors at temperatures not shown that will damage the corresponding materials References All technical contents of this part of GB 16895 are mandatory. GB 16895.3--2004/IEC 60364-5-54:2002 This part is equivalent to IEC60364-5-51:2002 (2nd edition) Electrical installations of buildings Part 5-51: Selection and installation of electrical equipment Grounding arrangements, protective conductors and protective bonding conductors (English version). This part replaces GB 16895.3--2004/IEC 60364-5-54:2002 Electrical installations of buildings Part 5-51: Selection and installation of electrical equipment Grounding arrangements, protective conductors and protective bonding conductors (1st edition). This part is part of the series of standards "Electrical installations of buildings". The chapter and article numbers of this part are consistent with IEC364-5-54:2002. Compared with GB16895.3:1997, the main changes of this part are as follows: 1) Added normative references (see 541.2), definitions (see 541.3) and references; 2) The contents of Chapters 544, 545 and 546 in GB16895.3-1997 were merged and adjusted to Chapters 543.4, 543.5, 543.6 and 543.7; 3) Chapter 547 in GB16895.3-1997 was adjusted to Chapter 544, and Title 7 was changed to "Protective bonding conductor (equipotential bonding conductor)",
4) The minimum size values of grounding electrodes of common materials were added in the form of Table 54.1; 3) The minimum size values of grounding electrodes of common materials were added in Table 54.1; 4) The minimum size values of grounding electrodes of common materials were added in Table 54.1; 5) The minimum size values of grounding electrodes of common materials were added in Table 54.1; 6) The minimum size values of grounding electrodes of common materials were added in Table 54.1; 7) The minimum size values of grounding electrodes of common materials were added in Table 54.1; 8) The minimum size values of grounding electrodes of common materials were added in Table 54.1; 9) The minimum size values of grounding electrodes of common materials were added in Table 54.1; 10) The minimum size values of grounding electrodes of common materials were added in Table 54.1; 11) The minimum size values of grounding electrodes of common materials were added in Table 54.1; 12) The minimum size values of grounding electrodes of common materials were added in Table 54.1; 13) The minimum size values of grounding electrodes of common materials were added in Table 54.1; 14) The minimum size values of grounding electrodes of common materials were added in Table 54.1; 15 Table 54B, Table 51C, Table 54D and Table 54E in GB16895.313=7 are merged into Appendix A, and the data content format is adjusted:
8) The technical content of Appendix B is refined.
Appendix A of this part is a normative appendix, and the appendix is an informative appendix. This part was proposed and drafted by the Technical Committee for Standardization of Electrical Installations in Full-voltage Buildings. The participating drafting units of this part: Mechanical Science Research Institute, China Light Industry Beijing Design Institute, Mechanical Science Research Institute. The main drafters of this part: Li Zhenglin, Huang Miaoqing, Guo Ting. The previous versions of the standard replaced by this part are: GB 16593.3-1997
541 General
541.1 Scope
GR16895.3—2004/IEC60364-5-54:2002 Electrical installations in buildings
Part 5-54: Selection and installation of electrical equipment Grounding configuration, protective conductor and protective bonding conductor series standard This part of the electrical installation in buildings makes corresponding provisions for grounding configuration, protective conductor and protective bonding conductor to meet the safety requirements of electrical installations. 541.2 Normative references
The following documents have become the references of this part of GB16895 through reference. For any dated referenced document, all its amendments (excluding errata) or revised versions are not applicable to this part; however, parties to an agreement based on this part are encouraged to study whether the latest versions of these documents can be used. For any referenced document without a date, the latest version applies to this part. GB14821.1 Protection against electric shock of electrical installations in buildings (GB14821.1—19932qV1EC60364-4-41:1992) GB16895.5 Electrical installations in buildings Part 4: Safety protection Chapter 43: Overcurrent protection (GB16895.5—2000, idt 1EC 60364-4-43:1977)
GB16895.6 Electrical installations in buildings Part 5: Selection and installation of electrical equipment Chapter 52: Wiring system. (GB16895.6-2CC0idtIEC60364-5-52:=993)GB/T17045 Common parts of electrical protection devices and equipment ((FR/T17145997idtIE51140:1992)IEC60050 (1S=) International Electrotechnical Vocabulary (IEV) Part 195: Grounding and protection against electric shockIEC60287-1-1 Calculation of rated current of cables Part 1-1: Rated current formula (100% load factor) and general principles for consumption calculation
IEC60364-4-44 Electrical installations in buildings Part 444: Safety protection against voltage interference and electromagnetic interference I EC60724 Short-circuit temperature limits of cables with rated voltages of 1 kV (tIm1.?kV) and 3 kV (tIm3.kV) IFC60853-2 Calculation of periodic and emergency rated currents of cables Part 2: Periodic rated currents of cables above 18/30 (36) kV and emergency rated currents of cables of all voltage levels IEC6090-0 Short-circuit current in three-phase AC systems Part 0: Current calculation IEC60949 Calculation of permissible short-circuit current for heat shields taking into account non-adiabatic thermal effects IEC61024-1 Lightning protection of buildings Part 1: General principles IEC Guide 104 Preparation of safety publications and application of basic safety publications and classified safety publications 541.3 Definitions
For this part, the definitions in GB/T 17C45 and the following definitions taken from 1FC60050 (195) apply. The definitions of 1 earthing arrangement, protective conductor and protective bonding conductor are given in Appendix B and in the following corresponding clauses respectively.
Exposed conductive part cxposcd-conductivc-part The conductive part of the equipment that can be touched by people under normal circumstances but can become live when the basic insulation is damaged. [1EV133-06-10]
GR16895.3—2004/1EC60364-5-54.2002541.3.2
Main earthing terminal LMain earthing busbar" main earthing terminal (main earthing busbar) - part of the grounding configuration of an electrical installation, a terminal or busbar used to make electrical connections with conductors used for grounding. [LIEV195-02-33]
earth electrode
A conductive part buried in a specific conductive medium (such as concrete or coke) with electrical contact to the ground. [EV195-02-0]-
protective conductor
Protective conductor
A conductor set for safety purposes (such as electric shock protection). [IEV1S5-02-09]
Protective bonding conductor
protectlve bonding ennduetorA protective conductor set for protective equipotential bonding. LIEV195-32-10J
Earthing conductor earthing conductor
A conductor that provides a conductive path or part of a conductive path between a given point in a system, device or equipment and a grounding electrode. [IEV195-C2-03]
Note: In this series of standards "Building Electrical Specifications", the grounding conductor is the conductor that connects the grounding electrode to a point in the equipotential bonding system, which is the main grounding terminal,
541. 3. 7
External conductive part extraneous conductive part is not an integral part of the electrical device and is easily led to a potential (usually a local potential)._IEV195-06-11J
542 Grounding configuration
542.1 General requirements
542.1.1 According to the requirements of the electrical device, the grounding configuration can have both or separately bear the two functions of protection and function. The requirements for protection should always be given priority. 542.1.2 If the device itself has a grounding electrode, the grounding electrode and the grounding conductor should be connected to the main grounding terminal. 542.1.3 The situation where the high-voltage system and the low-voltage system share the grounding configuration should be considered (see IE60364-4- 44 of 442). 542.1.4 Requirements for grounding configurations are intended to provide a ground connection that meets the above requirements: The protection requirements for the device are both reliable and applicable: It can conduct the ground fault current and the protective conductor current to the ground, and will not generate significant thermal, thermal mechanical stress and electrical mechanical stress and electric shock hazards due to this current: If relevant, it also applies to functional requirements, 542.2 Grounding electrode
542.2.1 The material and size of the grounding electrode should be selected so that it is both corrosion-resistant and has appropriate mechanical strength. Considering corrosion and board strength, the minimum size of the commonly used material grounding electrode buried in the soil is shown in Table 54.1. Note: If there is a lightning protection device (LP3): It should comply with the relevant requirements of IEC51024-1. 2
GB 16895.32004/IEC 60364-5-54:2002 takes into account corrosion and mechanical strength, and the minimum dimensions of common materials for grounding electrodes buried in the soil are shown in Table 54.1. Minimum dimensions. Hot-dip galvanized* or stainless steel holes. Riding expansion sleeves. Electric steel sheaths. Strips. Deep pile grounding electrodes. Threshold wires for shallow buried grounding electrodes. Round rods for deep buried grounding electrodes. Round
Shallow buried earthing electrode round wire "
" can also be used as buried electrode,
without coating.
For example, rolled strip or cut strip with rounded edges. Strip with rounded edges.
Diameter/
Under current technical conditions, continuous immersion chain can only be up to 50m thick, cross-sectional area?
If experience is available, 16mtn round wire can be used in places with low corrosion and mechanical damage. When the burial depth does not exceed 0.5, it is considered to be a shallow electrode, thickness
Thickness of coating/sheath/mm
Single value
Average value
542.2.2 The effectiveness of any suburban grounding electrode depends on the local soil conditions. One or more grounding electrodes should be selected according to soil conditions and the required grounding voltage:
542.2.3 Examples of grounding electrodes that can be used are as follows: - Underground metal structural mesh embedded in the foundation (foundation grounding): Metal plate:
Steel bars buried in underground concrete (except prestressed concrete): Metal rods or pipes:
Metal strips or wires!
Metal sheaths of cables and other metal sheaths installed according to local conditions or requirements: - Other applicable underground metal mesh installed according to local conditions or requirements.
GB16B95.3-2004/IEC60364-5-54.2002 Note 1: In Austria, Belgium, Finland, France, Germany, Sweden, Switzerland and the United Kingdom, water pipes are not allowed to be used as grounding electrodes. Note 2: In Italy, water pipe systems are allowed to be used as grounding electrodes only with the consent of the water supply department. 542.2.4 In selecting the type of earthing electrode and determining its appropriate depth, local conditions and regulations shall be taken into account to prevent the earthing resistance of the earthing electrode from increasing to such an extent that the protection against electric shock may be impaired in the event of soil drying or freezing (see DIN 14821.1). Note: In Germany, every new building shall be fitted with a foundation earthing electrode in accordance with DIN 18011. 542.2.5 Attention shall be paid to the problem of corrosion when different materials are used in the earthing arrangement. 542.2.6 Pipes for conveying flammable liquids or gases shall not be used as earthing electrodes. Note: This requirement does not exclude the use of such pipes as protective bonds in accordance with DIN 14821.1. 542.3 Earthing conductors
542.3.1 Earthing conductors shall comply with the provisions of 543:1; and, for earthing conductors buried in the soil, their cross-sectional area shall be determined in accordance with Table 64.2.
In a 1N system, if the fault current through the grounding electrode is not significant during the period of locking, the size of the grounding conductor can be determined in accordance with 544.1.1. Table 54.2 Minimum cutting area of grounding conductors buried in soil With weak mechanical damage protection
With anti-corrosion protection
Without anti-freezing protection
Copper: 2.5 mm2
Drop: 1°C mm2
: 25N
Iron: 30 mm2
Without mechanical damage protection
Copper: 16 mm2
Iron, 1 Grau
542.3.2 The connection between the grounding conductor and the grounding electrode shall be firm and have good electrical conductivity. This connection shall be made by thermite welding, crimping, clamping or other mechanical connectors. The mechanical connection shall be installed according to the manufacturer's instructions. If a clamp is used, it shall not damage the grounding electrode or the grounding conductor. Design: Relying on the kind of hanging parts or fixed parts that are connected by tin, it is impossible to ensure reliable hole strength. 542.4 Main earthing terminal
542.4.1 A main earthing terminal shall be provided in each device using protective bonding, and the following conductors shall be connected to it: protective bonding conductor:
grounding conductor,
protective conductor;
a functional grounding conductor (if relevant). Note 11 When the protective conductor is connected to the main earthing terminal through other protective conductors, it is not necessary to connect each protective conductor to the main earthing terminal. Note 2: The main earthing terminal of a building is usually used for kinetic energy grounding. For signal point technology, it is regarded as the connection point to the grounding electrode network. 542.4.2 Each electrode conductor connected to the main earthing terminal shall be able to be connected separately. This connection shall be firm and reliable, and can only be removed with tools.
Note: The disassembly method can be considered together with the setting of the main connection element to measure the resistance. 543 Protective conductor
543.1 Minimum cross-sectional area
543.1.1 The cross-sectional area of each protective conductor shall meet the conditions required by 473.1 of (314821.1 for automatic power cut-off and be able to withstand the expected fault current.
The cross-sectional area of the protective conductor can be calculated according to the formula in 543.2.2 or selected according to Table 54.3. Both methods should consider the requirements of 543.1.3.
The terminal size for connecting the protective conductor shall be able to accommodate the conductor of the size specified in this article. 4
Phase conductor cross-sectional area
16-S≤35
GB16895.3—2004/IEC60364-5-542002 Minimum cross-sectional area of protective conductor
Minimum cross-sectional area of corresponding protective conductor/inr2 The protective conductor and the phase conductor are made of the same material S
The protective conductor and the phase conductor are made of different materials x
will be ×16
1 is the value of the phase conductor: it is selected according to the material of the conductor and the insulation from Table A.54.: or from the table in GH 16895.5. 2 is the table value of the protective conductor, which is selected from the corresponding parameters in Table A.54, 2 to point 4.5. For PEV and body, its cross-sectional area is allowed to be reduced by 54 only under the premise of complying with the neutral conductor size determination principle (see GB 16805.6). 3.1.2 The carrying area of the protective conductor should not be less than the value determined by one of the following two: According to IEC60549;
- or when the instrument cut-off time does not exceed 5, it can be determined by the following formula: Saxrt
Where:
-cross-sectional area, unit is square millimeter (r:n); S
-the long-term fault current generated by the negligible impedance of the protective device (see, IFC60909-0) AC effective value + unit ampere (A);
-the operating time when the protective device is automatically cut off, unit is second (); Juice: The current limiting effect of the line impedance and the strict value of the protective device need to be considered. - A coefficient determined by the materials of the protective conductor, the insulation and other parts, and the initial and final temperatures (for calculation, see Appendix A). If the dimensions obtained by the formula are non-standard, a conductor with a larger standard cross-sectional area shall be used. Note 2: For temperature control of installations in potentially explosive atmospheres, see IEC 60079-0. Note 3: According to TFCG 07n2-1, the metal sheath of a mineral insulated cable has a greater earth fault carrying capacity than the phase conductor and does not need to calculate its cross-sectional area when such a metal sheath is used as a protective conductor. 543.1.3 The cross-sectional area of each protective conductor which is not part of the cable or is not in the same sheath as the conductor shall not be less than the following corresponding dimensions:
With protection against mechanical damage, copper: 2.5 mm; aluminum: 16 mm; without protection against mechanical damage, steel: 1 mm, lead: 16 mm. 543.1.4 When two or more circuits share a protective conductor, its carrying area shall be determined as follows: Taking into account the most serious expected fault current and operating time in these circuits, its cross-sectional area is calculated according to 543.1.1, or a cross-sectional area corresponding to the most human conductor in the circuit, and its cross-sectional area is selected according to Table 54.3. 543.2 Type of protective conductor
543.2.1 The protective conductor is also one or more of the following conductors that constitute the conductor in a multi-core cable:
Outer sheath (insulated or bare counter conductor) shared with live conductors: a fixed bare or insulated conductor; a metal cable sheath, cable shield, cable armor that meets the conditions specified in 543.2.2a) and b). Metal braid, concentric 5
GB 16895.3-—2004/TEC: 60364-5-54:2002 Conductors, metal conduits,
Design 1: In China, Italy, the United Kingdom and other countries, according to their regional or national regulations or standards, medium-voltage trays and cable ladders are allowed to be used as protective conductors. Note 2: Regarding the configuration of protective conductors, 43.6, 43.2.2 If the installation includes equipment with metal sheaths, such as low-voltage switchgear, control equipment or busbar systems, it is recommended that their metal sheaths or frames meet the following three requirements at the same time. They can be used as protective conductors: a) They should be able to use structures or appropriate connections to ensure the resistance to mechanical, chemical or electrochemical damage, thereby ensuring their electrical continuity
b) They should comply with the requirements of 43.1;
e) At each reserved tapping point 1, connection with other protective conductors should be allowed. 543.2.3 The following metal parts shall not be used as protective conductors or protective bonding conductors: metal pipes;
a metal pipe containing flammable gases or gases; a structural part subjected to mechanical forces during use! Flexible or bendable metal conduits (except those specially designed for protective earthing or protective bonding purposes);
a flexible metal fitting;
supporting wire. bzxZ.net
Note 1: In the United Kingdom, water pipes may be used as protective conductors. If a water pipe is used, the cross-sectional area of the bonding conductor shall be appropriate to its purpose. Note 2: In Switzerland, metal water pipes may be used as equipotential bonding conductors. 543.3 Electrical continuity of protective conductors
543.3.1 The protective conductor shall have appropriate protection against mechanical damage, chemical or electrochemical damage, electrodynamic forces and thermal forces. 543.3.2 For the convenience of inspection and testing, the connections of the protective conductor shall be accessible except for the following items: - Joints of filled materials
Joints of installed materials 1
Joints in metal conduits and trough boxes: Joints that have become separate parts of the equipment according to the equipment standard. 543.3.3 No devices shall be connected in series in the protective conductor. However, for the convenience of measurement, a connection that can be disassembled by a device may be provided - 543.3.4 When grounded electrical monitoring is used, special devices (starting sensors, coils) shall not be connected in series in the protective conductor. 543.3.5 The exposed conductive parts of the equipment shall not be used to constitute part of the protective conductor of other equipment, except as permitted in 543.2.2. 543.4PEV conductors
543.4.1PFN conductors may only be used in small areas of fixed electrical installations and, for reasons of mechanical strength, their cross-sectional area shall not be less than: 10 mm2 for copper or 16 mm2 for lead.
543.4.2PE conductors shall be insulated according to the highest voltage to which they may be subjected. Note: The insulation method used for PFV conductors in equipment should be considered by the relevant equipment committee. 543.4.3 If the neutral conductor and the protective conductor are each made of separate conductors from any point in the installation, it is not allowed to connect the neutral conductor to any other connected part of the installation (for example, the protective conductor tapped from the PE conductor). However, it is allowed to tap more than one protective conductor and neutral conductor from the PEN conductor. Separate terminals or busbars may be provided for the protective conductor and the neutral conductor. In this case, the PEN conductor shall be connected to the terminal or busbar provided for the potential-keeping conductor. 543.4.4 External conductive parts shall not be used as PEN conductors. 543.5 Protective and functional common grounding
543.5.1 The conductor used for protective and functional common grounding shall meet the requirements for protective conductors. It shall also meet the relevant functional requirements (see 444 of IF: 6R364-4-44). For the PEL or PEM conductor of the DC circuit of the information technology power supply, it can also be used as a conductor for the two common functions of functional grounding and protective grounding.
543.5.2 External conductive parts should not be used as PEL and PEM conductors. 543.6 Arrangement of protective conductors
GB16895.3-2004/IEC60364-5-54.2002 When the overcurrent protector is used for electric shock protection, the protective conductor shall be incorporated into the wiring system between the live conductors, or be located closest to them.
543.7 Reinforced protective conductor with protective conductor current exceeding 10 mA For electrical equipment intended to be used as permanent connections and the current of the protective conductor used exceeds 10 mA, the following requirements shall be provided:
- A copper conductor with a cross-sectional area of at least 10 mm2 or an aluminum conductor with a cross-sectional area of 16 mm2 shall be used for the entire length of the protective conductor: Note 1: PFV conductors designed in accordance with 543.4 meet this requirement. Or a second conductor with a cross-sectional area at least equal to that required for indirect contact protection shall be used, and it shall be laid to a point where the cross-sectional area of the protective conductor is not less than: copper: 0 mm2 or aluminum: 16 mm2. This requires that the electrical equipment shall be provided with a separate terminal for the first protective conductor. Note 2: In a TN-C system where a conductor (PEN conductor 7) is used for both the protective conductor and the protective conductor, and the conductor is connected to the terminal of the equipment, the current of the protective conductor can be defined as the charging current. Note: Usually, the electrical equipment with a large protective conductor current may not be compatible with the device equipped with residual current protection devices. 544 Protective bonding conductor [equipotential bonding conductor] 544.1 Protective bonding conductor connected to the main earthing terminal 544.1.1 For the protective bonding conductor provided as the main equipotential bonding according to 413.1.2.1 of GB14821.1 and the protective bonding conductor connected to the main earthing terminal according to 542.4, the cross-sectional area should not be less than the following size: copper, 6 mm2; or lead: 1G mm2; or steel: 50 mm2. 544.2 Protective bonding conductor used as auxiliary bonding 544.2.1 The conductance of the protective bonding conductor connecting two exposed conductive parts shall not be less than the conductance of the smaller protective conductor connected to the exposed conductive part.
544.2.2 The conductance of the protective bonding conductor connecting the exposed conductive part and the external conductive part shall not be less than the conductance of the cross-sectional area of the corresponding protective conductor half.
544.2.3 shall comply with the requirements of 543.1.3, GB 16895.3-2004/1EC 60364-5-54:2002 Appendix A
[Normative Appendix)
543.1.2 Calculation method of coefficients
(IEC60724 and IEC60949 may also be used)
The coefficients are determined by the following formula;
Where:
Q.(β+20℃)m(11
0 0 1
The accumulated heat capacity of thick material at 20℃, in joules per cubic millimeter (J/(cm2)) The reciprocal of the resistivity temperature of the conductor at 0℃, in degrees (℃); The resistivity of the conductor material at 20℃, in ohm millimeters (Qmm) The initial temperature of the conductor, in degrees (℃); The final temperature of the conductor, in degrees (℃).
Table A.54.1
Parameter values of different materials
Values taken from Table 1 of IEC 60387-1. b
Values taken from Table E2 of IEC 60853-2. (cmm)
3.45×.0-*
2.5×10-3
1, 45×:0-3
3. 8×10
17.241×10-6
28. 264 X 10 /4
21.1 × 10-5
158×10-4
A Vs/mn*
Table A.54.2 Temperature k of insulated protective conductors that are not cable cores and are not laid in bundles with other cables!
Conductor insulation
70t PO
90℃ PVC
90 VII: Thermosetting material
30℃ Rubber
85t: Rubber
Silicone
:60/110
160/140
Small values apply; 1Vc for large cross-sectional area H00mm2 Insulated conductors. The temperature limits for various types of insulating materials are given in IEC.60724. For the calculation of the temperature point, see the formula given at the beginning of this appendix. 8
143/133\
143/1335
Conductor materials
95/588
52/494
GB 16895.3-2004/IFC 60364-5-54:2002 Table A.54.3 Temperature limits for bare protective conductors in contact with cable sheaths but not bundled with other cables/
Cable sheath
Polyethylene
Chlorosulfonated polyethylene
Temperature limits for various types of insulating materials are given in JEC50724. For calculation methods, see the formula given at the beginning of this appendix. Table A.54.4 Temperature limits for protective conductors of copper
Conductor materials
Cable cores or bundled with other cables or insulated conductors!
Conductor insulation
70℃ FVC
90℃ PVC
9℃ Thermosetting resin
ut Rubber
85℃ Rubber
Silicone
160/140g
150/110
The small value is applicable to conductors with PVC insulation with an area greater than 30° mm*. The temperature resistance values of various types of insulation materials are given in IEC60724. For the calculation method, see the formula given in the beginning of this appendix. 1-5/203*
200/85*
Conductor material
76/684
Table 4.54.5
Temperature/
Cable insulation
70℃: PYC
90%I'v
90℃Thermosetting material
60℃Dream glue
85℃Porcelain glue
Basic rubber
Bare mineral sheath
The temperature limits of various types of insulating materials are given by IF:60724.
This value should also apply to bare conductors exposed to touch or in contact with combustible materials. Calculation method: See the formula given at the beginning of this appendix. Pot
Conductor material
36/31-4
Temperature!
Conductor insulation
70°C FVC
90°C PVC
9°C Thermosetting resin
ut Rubber
85°C Rubber
Silicone
160/140g
150/110
Small values apply to conductors with PVC insulation with an area greater than 30° mm*. The temperature resistance values of various types of insulation materials are given in IEC60724. For the calculation method, see the formula given in the beginning of this appendix. 1-5/203*
200/85*
Conductor material
76/684
Table 4.54.5
Temperature/
Cable insulation
70℃: PYC
90%I'v
90℃Thermosetting material
60℃Dream glue
85℃Porcelain glue
Basic rubber
Bare mineral sheath
The temperature limits of various types of insulating materials are given by IF:60724.
This value should also apply to bare conductors exposed to touch or in contact with combustible materials. Calculation method: See the formula given at the beginning of this appendix. Pot
Conductor material
36/31-4
Temperature!
Conductor insulation
70°C FVC
90°C PVC
9°C Thermosetting resin
ut Rubber
85°C Rubber
Silicone
160/140g
150/110
Small values apply to conductors with PVC insulation with an area greater than 30° mm*. The temperature resistance values of various types of insulation materials are given in IEC60724. For the calculation method, see the formula given in the beginning of this appendix. 1-5/203*
200/85*
Conductor material
76/684
Table 4.54.5
Temperature/
Cable insulation
70℃: PYC
90%I'v
90℃Thermosetting material
60℃Dream glue
85℃Porcelain glue
Basic rubber
Bare mineral sheath
The temperature limits of various types of insulating materials are given by IF:60724.
This value should also apply to bare conductors exposed to touch or in contact with combustible materials. Calculation method: See the formula given at the beginning of this appendix. Pot
Conductor material
36/31-
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