Earthing and bonding calculator
I-size ang earthing, main earth at bonding conductors.
Reads AS/NZS 3000:2018. Tables checked 27 Sept 2026.
Subukan ang isang job 6
Nilalagyan ng halimbawang value ang bawat job. Palitan ang mga ito ng sarili mong value.
- Size the earth for a shed submainThe protective earth for a 6 mm² copper submain to a shed.
- Size the main earth for large mainsThe main earthing conductor for 95 mm² consumer mains.
- Size the earth for an aluminium submainThe protective earth for a 120 mm² aluminium submain.
- Check an earth by the adiabatic equationThe earth conductor for a 6 kA fault cleared in 0.4 s, by calculation.
- Size the bond at a telecom terminalThe bonding conductor at a telecommunications earth.
- Size a bare copper earthThe earth with the k value of bare copper.
Mga input
Worked example gamit ang mga default na input.
- Materyal ng aktibong konduktor
- Tanso
- Pinakamalaking active conductor
- 16 mm²
- Active conductor ng consumer mains
- 16 mm²
- Bonding case
- General equipotential bonding
- Suriin sa pamamagitan ng kuwenta
- Hindi
Protective earthing conductor
6mm²
- Mula sa table
- 6mm²
- Main earthing conductor
- 6mm²
- Bonding conductor
- 4mm²
Design aid lang ang resultang ito. I-verify ito laban sa kasalukuyang standard.
Mga hakbang ng kalkulasyon
- Protective earthing conductor mula sa table6mm²
AS/NZS 3000:2018 Table 5.1
- Main earthing conductor6mm²
AS/NZS 3000:2018 Cl 5.3.3.2
- Bonding conductor4mm²
AS/NZS 3000:2018 Cl 5.6.3.2
- Napiling protective earthing conductorResulta6mm²
AS/NZS 3000:2018 Table 5.1
Tungkol sa calculator na ito
How this is calculated
The tool sizes the protective earthing conductor, the main earthing conductor and the bonding conductor. It reads AS/NZS 3000:2018. It starts from the size of the active conductor.
- Protective earthing conductor. You enter the active size and the conductor material. The tool reads the earth size from Table 5.1.
- Main earthing conductor. The tool reads Cl 5.3.3.2. It sizes the conductor from the consumer mains size you enter.
- Bonding conductor. You pick the bonding case. The tool reads the bonding conductor size from Cl 5.6.3.2.
- Adiabatic check. If you turn it on, you enter the fault current and clearing time. The tool then checks the selected conductor against the adiabatic equation. A larger size replaces the table size if it fails.
| Step | Table or clause | What it decides |
|---|---|---|
| Protective earth | AS/NZS 3000:2018 Table 5.1 | The earth size for the active size |
| Main earth | Cl 5.3.3.2 | The main earthing conductor size |
| Bonding | Cl 5.6.3.2 | The bonding conductor size |
Worked example
- 16 mm² copper active conductors. Consumer mains are also 16 mm², with the general bonding case. The protective earthing conductor is 6 mm². The main earthing conductor is 6 mm². The bonding conductor is 4 mm².
Limits
The table sizes cover the usual installation. The tool does not cover a special case. A long earth route can need a larger conductor for loop impedance. Use the loop impedance tool for that.
The tool does not choose the earth electrode or the earthing system. It does not check the conduit or cable support. The adiabatic check is off until you turn it on.
See also: The MEN system, Short-circuit withstand and the k factor and the fault rating tool.
Mga tanong
Design aid ang resulta. I-verify ito laban sa kasalukuyang standard.
Ano ang ginagawa ng earthing tool?
Binabasa ng tool ang laki ng protective earthing conductor para sa pinakamalaking active conductor. Binabasa nito ang laki ng main earthing conductor mula sa consumer mains. Ina-apply nito ang 4 mm² minimum at 120 mm² maximum, at iniuulat ang bonding size. Puwede rin nitong suriin ang laki sa pamamagitan ng kalkulasyon.
Aling table ang nagbibigay ng laki ng earthing conductor?
AS/NZS 3000:2018 Table 5.1. Binabasa ng tool ang copper active column o ang aluminium active column. Galing sa Clause 5.3.3.2 ang rule ng main earthing conductor. Galing sa Clause 5.6.3.2 ang bonding sizes.
Paano gumagana ang option ng kalkulasyon?
Ina-apply nito ang Equation 5.1 ng Clause 5.3.3.1.3. Sinisquare ng tool ang fault current at pinaparami sa disconnection time. Kinukuha ang square root nito at hinahati sa K para makuha ang area. Nire-round up ng resulta sa susunod na standard size. Nalalapat ang equation mula 0.1 s hanggang 5 s.
Aling K value ang dapat kong gamitin?
Ang Note 1 ng Clause 5.3.3.1.3 ay nagbibigay ng 170 para sa bare copper. Nagbibigay ito ng 136 para sa PVC insulated copper na hindi nakaayos sa cable kasama ng ibang conductor. Ang earthing conductor ay maaaring core na nakaayos sa cable kasama ng iba. Para sa kasong iyon, gamitin na lang ang k factor mula sa AS/NZS 3008.1.2 Table 52.
Anong laki ang MEN connection?
Sinusukat ng tool ang main earthing conductor batay sa laki ng consumer mains active. Sa copper, hindi bababa sa 4 mm² ito, at hindi ito kailanman kailangang lumampas sa 120 mm². Hindi nakalista sa table ang aluminium active conductor na mas mababa sa 16 mm².
Mga worked example
Background
- Earthing an outbuilding: earth or its own MENWhen a shed or sleep-out takes an earth with its submain and when it may have its own MEN link and electrode, the PEN size, and the electrode depths to use.
- Earthing conductor size: table or calculationHow the protective earthing conductor, the main earthing conductor and the bonding conductor are sized, worked on a 25 mm² active with a 3 kA fault.
Mga clause at table na binabasa ng tool na ito
- AS/NZS 3000:2018 Cl 5.3.3Earthing conductor size
- AS/NZS 3000:2018 Cl 5.3.3.2Main earthing conductor size
- AS/NZS 3000:2018 Cl 5.6.3.2Bonding conductor size
- AS/NZS 3000:2018 Table 5.1Minimum earthing conductor size by active conductor size
- AS/NZS 3000:2018 Table 5.1Minimum copper earthing conductor size for aluminium active conductors
- Cl 5.3.3.1.3 Note 1K values for the protective earthing conductor adiabatic equation
Bawat clause at table, kasama kung paano ito na-verify
Huling na-check ang mga table noong 27 Sept 2026.
Mga kaugnay na tool
- Cable size calculatorFind the smallest cable size that passes each check.AS/NZS 3008.1.2AS/NZS 3008.1.1AS/NZS 3000
- Outbuilding earthingEarth a shed: earth with the submain, or its own MEN.AS/NZS 3000
- Cable fault rating calculatorCheck that a conductor can withstand the fault current.AS/NZS 3008.1.2AS/NZS 3008.1.1AS/NZS 3000
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