AS NZS 1768 PDF

For many decades, the principals and senior management of LPI have been providing specialist lightning protection advice to customers in some of the most. Visit our website and learn more about AS/NZS standards. You may require this Standard if you are an electricity network operator or electrical contractor and intend to: design; construct; commission.

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AS / NZS 1768 Lightning Protection – Australian Government

A decision to provide lightning protection may be taken regardless of the outcome of any risk assessment, for example, ns there is a desire that there be no avoidable risk.

The recommendations specifically cover the following applications: This process is also known as risk management. There is a significant risk of side-flash for people in small, public structures such as picnic shelters, particularly those with unearthed metallic roofs. The object of this Section is to give a procedure for evaluation of the risk to a structure, people and installations or equipment in, on or connected to the structure.

Each year a number of persons are struck by lightning, particularly when outdoors in open space such as an exposed location on a golf course, or when out on the water. The structure may encompass a building and its associated outbuildings or equipment supports. This Standard is intended nss provide authoritative guidance on the principles and practices of lightning protection for a wide range of structures and systems.

Do not stand on or under bridges or other elevated structures. A small generation unit 176 a device that generates small amounts of electricity from hydro, wind or solar energy sources. A code of practice is a set of rules which details how people in a certain industry should behave.

It should also be noted that the usual neurological criteria for death may be unreliable in this situation. On the front page, the required inputs are subdivided into various categories with input cells highlighted with a border. Other areas of vulnerability, in decreasing order, are— d the exposed edges of horizontal roofs, and the slanting and horizontal edge of gable roofs.

These may include— a measures limiting step and touch voltages; b measures limiting fire propagation; c measures to mitigate the effects of lightning-induced overvoltages e. It consists of both external and internal LPSs and is 178 as a set of construction rules, based on corresponding protection zns.

In the case of hospitals and of structures with risk of explosion. This Standard was issued in draft form for comment as DR Avoid driving the car as a strike to the car may blow out the tyres. Hence, lightning strikes to the ground anywhere on this metallic network may cause shocks elsewhere.

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Section 8 gives advice on precautions to be taken during installation, inspecting, testing, and maintaining lightning nzz systems. A receding local thunderstorm is no longer a threat when more than 30 min have elapsed after the last thunder 1786 heard. These design rules may not apply to some small structures. If unavoidable, keep it brief and try not to touch electrical appliances, personal computers, metal pipes, stoves, sinks, and any other metallic objects at the same time.

For telecommunication overvoltages, AS Isolated buoys and pylons should be a. An example of this might be a communications installation at the top of an office building. Where headsets are used for a large percentage of the time, or where operators may be unaware of local lightning storms, the risk of injury from lightning can be dramatically reduced by the use of wireless headsets.

Risks less than 10 —5 per year i. This evaluation considers mechanical damage of the structure and contents, damage and failure of equipment, potential differences causing deaths of people and livestock from step nnzs touch voltages, and fire damage that may result from the lightning discharge.

In relation to human fatalities, various societal risk guidelines zs criteria have been proposed.

Standards Catalogue

Once a decision is made that lightning protection is necessary, Section 4 provides details on interception lightning protection for the building or structure. Review the risk components and follow the Risk Management procedure detailed in Clause 2. Incoming conductive electrical service lines add to the lightning collection area as they can conduct lightning current into the building. In the first aid treatment of a patient injured by lightning, it is essential that breathing be restored by artificial nsz and blood circulation be restored by external cardiac massage, if appropriate.

AS / NZS Lightning Protection

Many human activities imply a judgement that the benefits outweigh the related risks. Lightning strike victims are sometimes thrown violently against an object, or are hit by flying fragments of a shattered tree, so first aid treatment may have to include treatment for traumatic injury.

Conventional fabric tents offer no protection; small sheds offer uncertain protection. Where doubt exists as to the need for lightning protection, further advice should be sought from a lightning protection designer or installer. Before any decision is made not to install lightning protection to a structure, consideration should be given to the factors outlined in other sections of this Standard. This involves a choice from a range of protection level efficiencies for protection against direct d strikes to the structure and decisions about the extent of other measures for protecting low-voltage and electronic equipment against indirect i lightning stresses incident from nearby strikes.

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Please help us to share our service with your friends. This figure has been derived from ground flash density data obtained from the Lightning Detection Network of New Zealand for the period January 1, through February 9, A number of completed spreadsheet examples are provided for information in Appendix A.

What legislation specifies this requirement? There may be significant loss of revenue economic loss associated with damage to computer centres and communication nodes. The total risk, R, is made up of the sum of a number of risk components associated with the four possible sources of damage according to the point of strike as listed below: Please consult the Contact Officer for more information and to ascertain the level of compliance if any that may be required.

The effects of lightning include burns to the skin, which are usually superficial, damage to nzd bodily organs and systems, unconsciousness and, most dangerously, cessation of breathing and cessation of heart beat. Alternatively, both organizations publish an annual printed Catalogue with full details of all current Standards. Persons within a substantial structure are normally protected from direct strikes, but may be exposed to a hazard from conductive electrical services entering the structure or from conductive objects within 1678 structure that may attain different potentials.

For example, in theatres ad halls there can be a significant risk of 178 if a lightning strike causes loss of electricity supply or other mechanical or fire-related damage.

The TP for incoming services includes the use of isolation devices, the shielding of cables and the installation nze coordination of SPDs. For most input cells, the input option is selected from a pull-down menu of key words that are defined in the associated comment box. You may require this Standard if you are an electricity network operator or electrical contractor and intend to: Nzzs term refers exclusively to the danger arising from ignition.