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AmpSize

Surge protection check

Is a surge protective device required or recommended here?

AS/NZS 3000Data under review

Reads AS/NZS 3000:2018.

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Each job fills in example values. Replace them with your values.

Inputs

A worked example with the default inputs.

Country
New Zealand
New installation
Yes
Overhead supply
No
Human life: safety services, medical care
No
Public services or cultural heritage
No
Commercial or industrial activity
No
A large number of co-located people
No

Surge protective device

Recommended

Clause
AS/NZS 3000:2018 Cl 2.7.3
Basis
AS/NZS 3000:2018 Section 2.7.3, applied in New Zealand as a recommendation unless the Electricity (Safety) Regulations 2010 call for it
Standing
Derived, not read from the printed standard

This result is a design aid. Verify it against the current standard.

Calculation steps

  1. InstallationNew installation

    AS/NZS 3000:2018 Cl 2.7.3 (derived)

  2. Consequences of an overvoltageNone of the listed consequences

    AS/NZS 3000:2018 Cl 2.7.3 (derived)

  3. Surge protective deviceResultRecommended

    AS/NZS 3000:2018 Cl 2.7.3 (derived)

  4. BasisAS/NZS 3000:2018 Section 2.7.3, applied in New Zealand as a recommendation unless the Electricity (Safety) Regulations 2010 call for it

    AS/NZS 3000:2018 Cl 2.7.3 (derived)

Questions

The result is a design aid. Verify against the current standard.

Does a house need a surge protective device?

In New Zealand, AS/NZS 3000 Section 2.7.3 is applied as a recommendation unless the Electricity (Safety) Regulations 2010 call for one. In Australia a new house takes a recommendation too, unless an overvoltage there would affect human life, public services, commerce or many people. AmpSize states this as derived.

When is a surge protective device mandatory in Australia?

Amendment 2 to AS/NZS 3000:2018 made it mandatory for a new installation where the consequences of an overvoltage affect human life, public services or cultural heritage, commercial or industrial activity, or a large number of co-located people. The tool reads those four cases.

Why does the tool say derived?

AmpSize has not read Section 2.7.3 from the printed standard, and Amendment 2 is not on hand. The table states the rule as it is commonly reported, and the result carries that mark until the pages are read.

Does an overhead supply change the answer?

Not in the clause the tool reads. An overhead supply is more exposed to lightning surges, so the tool notes it and points to a risk assessment to AS/NZS 1768, which can show the need for a device.

Clauses and tables this tool reads

Every clause and table, with how each was verified

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