Foundation level
Ang mga ideyang kailangan ng mambabasa bago ang unang kalkulasyon: current, voltage drop at ang MEN system.
- 4 min basahinConduit fill and installation methodsHow the conduit space factor works, what the fill percent means against the 40 percent limit, and how the install method names on site map to the 3008 columns.
- 5 min basahinCurrent-carrying capacity and deratingWhy one cable size has many ratings. Install method, ambient, grouping, soil and depth, with a 25 A circuit that needs 10 mm² once the factors apply.
- 3 min basahinDownlights and insulation: IC-4, CA90 and Non‑ICThe six recessed luminaire classes, what insulation may do around each, which a NZ or AU home may have, the default clearances, and the roof space warning sign.
- 3 min basahinHome batteries and AS/NZS 5139How a home solar battery is sized in kWh, what usable, nominal, depth of discharge and round-trip efficiency mean, and where AS/NZS 5139 lets one go.
- 4 min basahinHome battery location and clearancesWhere AS/NZS 5139 lets an all-in-one home battery go. Restricted places, 600 and 900 mm zones, the habitable room barrier, ceiling, IP codes and working space.
- 3 min basahinHow many circuits can go on one RCDThe AS/NZS 3000 Cl 2.6.2.4 arrangement rules in plain words, which circuits need a 30 mA RCD in NZ and AU homes, how RCBOs count, and why the rules exist.
- 3 min basahinIP ratings explained: each digit and letterWhat the two numerals of an IP code mean, what X, the letters A to D and H, M, S, W add, why IP67 is not better than IP65 for jets, and where 3000 sets a code.
- 4 min basahinMEN system: multiple earthed neutral explainedMEN means multiple earthed neutral. In NZ, earth and neutral join at the main switchboard. A fault on a 32 A C curve circuit then draws 343.8 A and clears.
- 6 min basahinOhm's law and power on d.c. and a.c.Ohm's law and the power formulas on d.c., single-phase and three-phase a.c.: how power factor and impedance change them, and how any two values give the rest.
- 3 min basahinPower points near a cooktop, gas bottle and sinkThe AS/NZS 3000 zones that keep power points, switches and lights away from cooktops, gas cylinders, gas vents and regulators, and where sinks are checked.
- 2 min basahinSwitchboard labels and circuit chartsWhat AS/NZS 3000 asks a switchboard to carry: a chart tying each device to what it supplies, MAIN SWITCH, MAIN SWITCHBOARD, solar labels and marked neutrals.
- 3 min basahinThe 5 % voltage drop limit from supply to loadWhat AS/NZS 3000 Cl 3.6.2 limits, how the drop of the mains, submains and final subcircuits adds by percent, the four exceptions and why any split is yours.
- 2 min basahinThe order of verification testsWhy AS/NZS 3017 tests earth continuity before insulation and loop impedance before RCDs, which circuits take which test, and where each limit comes from.
- 4 min basahinVoltage drop basicsOhm's law on a cable, the mV/A·m shortcut, the percent limit and the maximum length, worked on a 25 A run over 35 m of 4 mm² copper.
- 4 min basahinWho may do electrical work in NZThe regulations that govern prescribed electrical work and its certification in New Zealand, named by number, with the paperwork abbreviations explained.
- 2 min basahinWire colours in NZ and Australia, old and newThe active, neutral and earth colours of AS/NZS 3000 Table 3.4, the NZ black neutral, older yellow and green conductors, and flexible cord colours.
Mga calculator na ginagamit ng mga guide na ito
- Conduit fill calculatorTingnan kung kasya ang cable bundle sa conduit.
- Cable size calculatorHanapin ang pinakamaliit na cable size na pumapasa sa bawat check.
- Downlight clearance checkIC, CA90 o Non‑IC: puwede bang dumikit ang insulation sa ilaw?
- Correction factor calculatorBasahin ang bawat correction factor at ang rating na kailangan ng cable.
- Solar battery calculatorI-size ang home battery para sa solar evening load.
- Battery bank calculatorKalkulahin ang capacity at autonomy ng battery bank para sa isang load.
- DC cable size calculatorI-size ang d.c. cable hanggang 1500 V para sa current at voltage drop.
- Battery location checkerTingnan kung saan puwedeng ilagay ang home battery ayon sa AS/NZS 5139.
- RCD arrangement checkTingnan ang mga circuit kada RCD at ang lighting split.
- RCD Selection calculatorTingnan kung kailangan ng RCD at subukan ang trip time.
- IP rating chart at decoderI-decode ang IP code at hanapin ang pinakamababang kailangan para sa lokasyon.
- Wet area zones checkerHanapin ang Section 6 zone, IP at RCD malapit sa tubig.
- Earth fault loop impedance calculatorTingnan ang earth fault loop impedance laban sa maximum Zs.
- Cable fault rating calculatorTingnan kung kayang tiisin ng conductor ang fault current.
- Ohm's law at powerAnumang dalawa sa V, I, R at P ay magbibigay ng iba pang dalawa.
- Three phase power calculatorI-convert sa pagitan ng power, current, voltage at power factor.
- Full load current calculatorKalkulahin ang full load current mula sa power, voltage at phase.
- Power point location checkPower point malapit sa cooktop, gas cylinder, vent o lababo.
- Switchboard circuit chartGumawa ng board circuit chart at ang mga label na kailangan nito.
- Switchboard form checkerTingnan ang separation, access at clearances ng switchboard.
- Total voltage drop calculatorIdagdag ang drop ng mains, submain at final laban sa 5 %.
- Voltage drop calculatorKalkulahin ang voltage drop sa cable run at tingnan ang limit.
- Test schedule para sa switchboardI-print ang board test sheet kasama ang limit ng bawat test.
- Test results checkerTingnan ang nasukat na test results laban sa Section 8 limits.
- Voltage Rise calculatorKalkulahin ang voltage rise para sa embedded generation o PV.
- Pathway ng electrical certificationHanapin ang mga papeles para sa trabaho sa NZ o Australia.
- Maximum demand calculatorI-estimate ang maximum demand para sa domestic o non‑domestic loads.
- Gabay sa kulay ng electrical wireHanapin ang kulay ng wire para sa fixed wiring at cord, luma at bago.
- Test and tag intervalsMga retest interval at pass limit para sa portable gear.