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Earthing should form part of the companies Electrical Installations Code of Practice. There are numerous types of earthing standards which must be conformed to. The Company must establish to which Standard it must conform and make it a non negotiable standard. There are low voltage earthing and high voltage earthing standards. IEC60364-1 International Standard deals with this. Earthing is a highly explosive or flammable (mining, petrochemical) environments are very important. Reference can be made to the International Standards when determining the type of earthing to be used and to determine conformity.
Few topics generate as much controversy and argument as that of grounding or earthing and the associated topics of lightning and surge protection of electrical and electronic systems.
A correct understanding of the basic principles involved will help to avoid mistakes in grounding system design, mistakes that could lead to expensive failures and long downtime
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Proper grounding of decoder systems is part of the installation that requires consideration. Properly grounded decoder systems perform very well even in high-lightning regions. Poor grounding often results in unnecessary equipment losses and irrigation down time.
Earth grounding rules for the I-Core decoder controllers are the same as for the conventional I-Core controllers. A large ground lug is provided for connection of bare copper wire to earth grounding hardware.
Hunter DUAL-S surge arrestors must be used on all DUAL two-wire systems. The DUAL-S surge arrestor attaches directly to the two-wire path to minimize the damage from lightning strikes. The amount of surge protection needed depends on how exposed the area is to lightning and on how well the installation needs to be protected. In addition to grounding the controller, the minimum recommended level of protection is one DUAL-S grounded at the end of each two-wire path and one DUAL-S grounded every1000 ft/300 m or12th decoder. For higher levels of protection, attach surge arrestors more often.
Earthing should form part of the companies Electrical Installations Code of Practice. There are numerous types of earthing standards which must be conformed to. The Company must establish to which Standard it must conform and make it a non negotiable standard. There are low voltage earthing and high voltage earthing standards.
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