GB/T 16895.27-2012[GB/T 16895.27-2012] Low-voltage electrical installations -- Part 7-705: Requirements for special installations or locations -- Agricultural and horticultural premises (English PDF)

705.11 Scope

This section provides a fixed electrical installations to agricultural and horticultural facilities, indoor and outdoor. Some requirements are also used to make other

Places, such as public buildings and facilities belonging to agricultural and horticultural facilities.

As family houses and similar applications, locations and regions, it is not included in this section.

If some special requirements of Section 705 is also applicable to other places such as residential and public buildings like that, which in this section

The body will be described.

705.12 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein

Member. For undated references, the latest edition (including all repair orders) applies to this document.

GB 7000 (all parts) lamps [IEC 60598 (all parts)]

IEC 60598-2-24 Safety requirements of luminaires with limited surface temperatures (Luminaires-Part 2-24. Particularrequirements-

Luminareswithlimitedsurfacetemperatures)

IEC 60309-1 industrial plug and socket couplers - Part 1. General requirements (Plugs, socket-outletsandcouplers

forindustrialpurposes-Part 1. Generalrequirements)

IEC 60309-2 industrial plug and socket coupling - Part 2. pin and tube accessories electrical accessories interchangeability dimensions

Requirements (Plugs, socket-outlets and couplers for industrial purposes-Part 2. Dimensional

interchangeabilityrequirementsforpinandcontact-tubeaccessories)

Part 5 IEC 60364-5-53 Electrical installations of buildings. Selection and erection of electrical equipment Chapter 53. Switchgear and control

Device (Low-voltageelectricalinstalationsofbuildings-Part 5-53. Selectionanderectionofelectrical

equipment-lsolation, switchingandcontrol)

IEC 61084-2-1 for electrical installations cable trunking and ducting systems - Part 2. Particular requirements - Section 1. for installation in a wall or ceiling

Board cable trunking and ducting systems (Cabletrunkingandductingsystemsforelectricalinstalations-Part 2.

Particularrequirements-Section1. Cabletrunkingandductingsystemsintendedformountingon

walsorceilings)

Safety - Part 2-71 IEC 60335-2-71 Household and similar electrical appliances. breeding and rearing animals with electrical heating appliances

Particular requirements (Householdandsimilarelectricalappliances-Safety-Part 2-71. Particularrequirements

forelectricalheatingappliancesforbreedingandrearinganimals)

IEC 60364-5-55 low-voltage electrical installations - Part 5. Selection and erection of electrical equipment Chapter 55. Other equipment (Low

voltageelectricalinstalations-Part 5-55. Slectionanderectionofelectricalequipment-Otherequip-

ment)

IEC 61386-21 for electrical installations - Part 21 Catheter System. Particular requirements - Rigid conduit systems (Conduitsystems

forcablemanagement-Part 21. Particularrequirements-Rigidconduitsystems)

IEC 60884-1 for household and similar purposes plugs and sockets - Part 1. General requirements (Plugsandsocket-outletsfor

householdandsimilarpurposes-Part 1. Generalrequirements)

705.20 Terms and Definitions

The following terms and definitions apply to this document.

705.20.1

Agricultural and horticultural facilities agriculturalandhorticulturalpremise

For the following purposes houses, places or regions.

--- Livestock;

--- Feed, fertilizers, plant and animal production, storage, preparation or processing;

--- Seedling cultivation, such as. Greenhouse

Note. Agricultural and horticultural facilities, due to special external influences, such as chemical vapor moisture, dust, corrosive, acid or salt for electrical equipment Movies

Sound as electrical equipment selection and installation, suitable for special requirements. In addition, because there is a strong flammable substances may increase fire

Danger disaster. Agricultural and horticultural facilities include, for example.

--- As animals such as cattle, pigs, horses, sheep, goats Habitat homes and sheds, including the neighboring houses (for example, feed processing sites, milking farm machinery

The milk storage room);

--- For hay, straw, feed, fertilizer, grain, potatoes, sugar beet, vegetables, fruits, ornamental plants and the fuel stack rooms, warehouses and storage rooms,

greenhouse;

--- Commercial and/or mass production, preparation and processing (drying, cooking, squeeze, fermentation, slaughtering, meat processing, etc.) of agricultural and horticultural products

place.

705.20.2

Agricultural and horticultural facilities belonging to residential and other places residencesandotherlocations

belongingtoagriculturalandhorticulturalpremises

Note 1. Examples of other places including offices, meeting room, mechanical workshop, studio, washing libraries and shops.

Note 2. The portion of the outside world is not conductive part of electrical installations, but it is easy to introduce hazardous potential (see GB/T 2900.71-2008 in 826-11-

705.312.2.1 TN system

Supplemented as follows.

Electrical device connected to the workplace TN systems, electrical devices from power supply terminal started the following should be used neutral conductor and protective conductor separation

body. This requirement also applies, by definition 705.20.2 belongs to agricultural and horticultural facilities, residential and other places.

705.4.41 Protection against electric shock

705.411 Protective measures. Auto power off

705.411.1 Overview

Supplemented as follows.

In the loop, either type of grounding system should provide the following sub-breaker.

--- The rated current is less than 32A power socket terminal loop using Ideltan not exceeding 30mA residual current operated

protector;

--- The rated current greater than 32A power socket terminal loop, using no more than 100mA Ideltan residual current operated

protector;

--- In all other circuits, using no more than 300mA Ideltan residual current operated protective devices.

NOTE. In the need to improve the operational continuity of the circuit used is not greater than the rated residual operating current of 300mA residual current operated protective devices appropriate for the type S

, Or delay.

705.414 Protective measures. The SELV and PELV extra low voltage

705.414.4 SELV and PELV circuits to requirements

705.414.4.5 is the use of protective measures in SELV and PELV place, no matter what kind of nominal voltage, protection against direct contact

(Basic protection) should use one of the following measures.

--- To provide at least the IP ×× B or IP2 × degree of protection cover bar or housing, or

--- Insulation can withstand the root mean square value of 500V AC voltage 1min.

705.415.2 Additional protection. supplementary protection equipotential bonding

705.415.2.3 expected in livestock used in place should be secondary protective equipotential bonding, all the animals could hit the outer

Exposed conductive parts and external conductive parts are connected. Laid in the ground on a metal mesh, it should also be included in place of a supplementary protection

Equipotential bonding within (see Appendix A illustration).

External conductive parts, either in the ground or on the ground, for example, a conventional reinforced concrete or for storing liquefied

Cellar reinforced fertilizer, should be part of a supplementary protection equipotential.

Void of concrete prefabricated elements recommendations made by the voids of the ground, and other links is seen as part of the potential (see Figure A.3).

Supplementary protection equipotential bonding and wire mesh (if any) of the installation should be able to prevent lasting damage to mechanical stress and corrosion.

705.4.42 thermal effects protection

705.422 Fire Protection Measures

Increased sub-clause.

705.422.6 livestock breeding and feeding electrical heating appliances used, shall comply with IEC 60335-2-71, and should be fixed installation

In place to avoid.

--- Livestock burn any danger; and

--- Any danger from the fire ignited flammable material.

If the heater manufacturer in the instruction manual does not provide for a greater distance, the radiant heater should be set at a distance and livestock

Distance from flammable material of at least 0.5m.

705.422.7 To prevent fire, should be set with a rated residual operating current not exceeding 300mA residual current device (see

705.411). Residual current protection should cut off all live conductors, the need to improve the operational continuity of the circuit not protected socket

Residual current device should be S-shaped, or delay.

Note. residual current protection in accordance with the requirements of 705.413.1 used as a protective circuit terminal, it can also play an effective fire protection.

705.422.8 in places with fire danger, return conductor by the extra-low voltage power supply, the protection should be provided in line with both the use of energy

IP ×× D or IP4 × degree of protection to hide the column or housing, can also use the cladding of insulating material, attached to the basic insulation.

705.443 pairs atmospheric over-voltage or over-voltage protection operation

Added Note.

Note. The use of electronic devices place, it is recommended in accordance with the provisions of GB/T 21714.3 and GB/T 21714.4, the use of lightning protection measures; and follow

GB 16895.12-2001 in 443 and 534 GB 16895.22-2004 used for over-voltage protection measures.

705.5.51 electrical equipment selection and installation --- general rules

705.512 operating conditions and external influences

705.512.2 outside influence

Supplemented as follows.

In the agricultural and horticultural facilities, while electrical equipment under normal conditions of use, should have a minimum of IP44 degree of protection, in IP44

Lower level can not meet the requirements of the situation, it should be provided in compliance with IP44 enclosure inside.

Power outlet should be installed in the premises is unlikely to contact with combustible material place.

In the external influence conditions > AD4, > AE3 and/or > AG1 occasion to deal with a power outlet to provide adequate protection.

You can also use additional housing or by means of protective measures installed in the depression of the building.

These requirements do not apply to those residential properties belonging to agricultural and horticultural facilities, offices, shops and the field has a similar outside influences

That, in these places, the power outlet should be consistent with the requirements of IEC 60884-1.

In places with a corrosive substance, for example, dairy farm, cow, electrical equipment should have the appropriate protective measures.

705.513 accessibility

705.513.2 livestock accessibility

Livestock should be no closer to the electrical equipment, equipment for the inevitable close thereto, for example, feeding equipment and water tank, in order to avoid damage,

It should be properly constructed and installed to minimize the risk of damage to livestock.

705.514 Identification

705.514.5 sketch

Users 705.514.5.3 electrical installations should be access to and control of the following documents.

--- Electrical equipment layout plan; and

--- Concealed cabling road map; and

--- Distribution system one-line diagram; and

--- Indicate the junction point of the equipotential bonding Fig.

705.52 electrical equipment selection and installation of wiring systems ---

Selecting and installing 705.522 and external influences associated cabling system

Supplemented as follows.

Livestock and can be installed closer to their place of captivity, cabling system wiring should be made inaccessible to livestock, or with appropriate protective machine

Mechanical damage of protective measures.

Overhead lines should be insulated.

In the area of agricultural facilities, motor vehicles and mobile agricultural machinery occasion, should adopt the following installation methods.

--- Cable buried in the ground to a depth of at least 0.6m; with the additional mechanical protection;

Note 1. The raceway is used as additional protection where they should withstand 450N pressure level of protection, and, in accordance with IEC 61386-24

Provisions of the collision can provide the required level of protection.

--- Of arable farming land or buried cable depth of at least 1m;

--- Self-supporting suspension cables erected height of at least 6m.

Note 2. The cable buried in the ground is the preferred installation method.

705.522.6.3 the supply side of the electrical device to the main power distribution panel wiring system, if there is no RCD protection, should also be protected against mechanical

Damage protection, for example, buried in the soil, or mounted in separate closed cable tray or conduit system.

This requirement should also apply to homes and other premises belonging to the agricultural or horticultural facilities.

705.522.10 should pay special attention is the presence of different species of animals, such as mice and rats.

705.522.16 ducts, pipes and tank cartridge system

Livestock premises, outside influence is classified as AF4 level. In accordance with IEC 61386-21, the catheter used indoors it

Corrosion has at least grade 2 (moderate) degree of protection role, and for outdoors, for the Level 4 (advanced protection)

The wiring system may be due to motor vehicles and agricultural machinery and other movable and subjected to mechanical impact extrusion, for this place, outside

The impact should be classified as AG3 level.

--- In accordance with IEC 61386-21, the catheter extrusion having at least four (severe) degree of protection;

--- In accordance with IEC 61386-21, the cable tray and conduit systems for stamping should provide serious type of protection.

705.53 Selection and erection of electrical equipment --- isolation, on-off and control

Only a running visual indication of the location of the electrical heater can be used.

705.536 isolation and Continuity

705.536.2 isolation

In accordance with the requirements of GB 16895.22-2004 of each building or part of a building's electrical system, you should use a separate, isolated

Device isolation.

Circuit occasional use (for example, during the harvest period), including all live conductors, including the neutral conductor should adopt quarantine measures.

Isolating device shall be marked out which part belongs to the electrical device.

Where livestock is possible to reach places, or there may have been impeded in any position of livestock, are not isolated and should be installed off the device,

As well as an emergency stop or emergency operating device.

Wherever possible to make livestock panic events are to be considered.

--- Selection and installation of electrical equipment grounding 705.54 configuration, protective conductors and protective bonding conductors

705.544 Protective bonding conductor (equipotential bonding conductor)

705.544.2 auxiliary protective bonding conductors

Protection (equipotential) bonding conductor should be protected against mechanical damage and corrosion measures, and should be used to avoid the effects of electrolytic conductor.

Such as the choice of the following conductors.

--- Size of at least 30mm × 3mm hot galvanized flat steel; or

--- Diameter of at least 8mm of hot galvanized steel bar; or

--- Minimum cross-sectional area of 4mm2 copper conductor.

You can also use other suitable materials.

705.55 Selection and erection of electrical equipment --- other devices

705.55.1 socket

Outlets for agricultural and horticultural facility shall comply with IEC 60309-1 or IEC 60309-2 (when present exchange requirements) and rated current

Over the relevant provisions of 20A socket.

705.556 safe power supply

705.556.8 high density livestock automated life support system

High-density livestock, animal issue as a life support system operation to be considered as follows.

a) a power failure and can not be guaranteed food, water, air and/or place for livestock supply lighting should be used for safety power supply

As an alternative or backup power (see also GB/T 16895.18 in 551). To supply ventilation and lighting devices should be

Set up a separate terminal loop. Such a circuit should only supply to the ventilation and lighting work as necessary for electrical equipment.

b) to the main circuit power ventilation shall be guaranteed under any circumstances over current and/or shorted to ...