Tasks
Pick the job. The calculator opens with example values. Replace them with your values. To pick a calculator by name, use all tools.
Trade
369 tasks
Cables
133Cable Size24
- Size a cable for a shedThe smallest cable that carries the load over the run to a shed.
- Size a cable for an EV chargerThe cable size for a 32 A charger on a 25 m run.
- Size a submain for a tenancyThe smallest three phase submain that passes each check, on AU 3008.1.1:2025.
- Price a cable runA size and a length you can take to a price.
- Size the cable for an ovenThe cable for a 32 A cooking circuit on a 15 m run.
- Size a hot water cylinder circuitThe cable for a 3 kW cylinder on a 20 m run.
- Size a heat pump circuitThe cable for a 20 A heat pump on an 18 m run.
- Size the mains for a houseThe consumer mains for 63 A over 25 m underground.
- Size a three-phase EV charger circuitThe cable for a 22 kW charger on a 30 m run.
- Size an aluminium submainThe smallest aluminium submain for 250 A over 80 m.
- Size a cable in ceiling insulationThe cable for 16 A where insulation surrounds it.
- Size a cable on a hot roofThe cable for 25 A at 50 °C ambient.
- Size a buried cable in dry soilThe cable for 100 A at 2.5 K·m/W and 0.8 m deep.
- Size six circuits on one trayThe cable for 40 A grouped with five other circuits.
- Size parallel cables for 800 ATwo cables per phase for an 800 A feeder.
- Size a cable for a harmonic loadThe cable for 63 A with 35 % third harmonic.
- Size a 22 kW motor cableThe cable for a 41 A motor over 60 m on a 50 A D-curve breaker.
- Size a submain to a sleep-outThe submain for 40 A over 35 m.
- Size a cable with a fault checkThe cable for 32 A that also withstands 6 kA for 0.1 s.
- Size a pool pump circuitThe cable for a 1.5 kW pump on a 30 m run.
- Size a welder outlet circuitThe cable for a 32 A three-phase outlet in a workshop.
- Size a workshop submainThe three-phase submain for 63 A over 45 m.
- Size a supply to a tiny homeThe cable for a 16 A supply over 30 m.
- Size a submain to the 2025 editionA 100 A run of 50 m, read on AS/NZS 3008.1.1:2025 for Australia.
Voltage Drop13
- Check a long run for voltage dropThe voltage drop on the run, against the limit.
- Check a 12 V d.c. run for dropThe voltage drop on a 30 A caravan feed over 6 m, against the 10 % ELV limit.
- Check the drop on a PV array cableThe d.c. drop of a 15 A string at 600 V over 40 m on 4 mm².
- Check the drop on a submainThe voltage drop on a 100 A three-phase submain over 80 m.
- Check the drop on a lighting circuitThe drop on an 8 A lighting circuit over 45 m.
- Check the drop to a rural pumpThe drop on 10 A over a 250 m run.
- Check the drop on aluminium mainsThe drop on 200 A over 60 m of aluminium mains.
- Check a 24 V control circuitThe drop on 2 A at 24 V over 60 m.
- Check a 48 V battery cableThe drop on 100 A over 3 m at 48 V.
- Check the drop with a loaded neutralThe drop on an unbalanced circuit with 20 A in the neutral.
- Check an extension leadThe drop on 10 A through a 30 m lead.
- Estimate a 160 A submain for a tenderThe drop on 160 A over 90 m, three phase.
- Check the drop at a 3 % limitThe drop on 32 A over 40 m against a 3 % limit you set.
Loop Impedance7
- Check disconnection timeThe loop impedance of a 32 A circuit on a 45 m run, against the maximum Zs.
- Check Zs on a socket circuitThe loop impedance of a 20 A circuit on 2.5 mm² over 30 m.
- Check Zs on a lighting circuitThe loop impedance of a 10 A circuit on 1.5 mm² over 40 m.
- Check Zs on a motor circuitThe loop impedance of a 25 A D-curve circuit over 35 m.
- Check Zs on a shed submainThe loop impedance of a 63 A submain on 16 mm² over 60 m.
- Check Zs on a weak rural supplyThe loop impedance of a 20 A circuit with 0.8 Ω at the supply.
- Check Zs in AustraliaThe loop impedance of a 20 A circuit against the Australian tables.
Fault Rating6
- Check a conductor against fault currentWhether a 35 mm² XLPE conductor withstands 10 kA for 0.2 s.
- Check consumer mains against 6 kAWhether 16 mm² mains withstand 6 kA for 0.1 s.
- Check a final circuit against 3 kAWhether 2.5 mm² withstands 3 kA for 0.1 s.
- Check an aluminium feederWhether 95 mm² aluminium withstands 20 kA for 0.3 s.
- Check a one-second withstandWhether 120 mm² withstands 25 kA for 1 s.
- Check a cable with a soldered jointThe lower limit a soldered joint sets on a 25 mm² cable.
Conduit Fill7
- Fill a conduitThe space factor of a 4 mm² single core circuit in a 25 mm conduit.
- Fit a submain in a conduitWhether four 16 mm² singles fit in a 32 mm conduit.
- Fit two flat cables in a conduitWhether two 2.5 mm² twin and earth cables fit in 20 mm.
- Fit PV string cablesWhether six 6 mm² singles fit in a 32 mm conduit.
- Fit a 35 mm² submainWhether four 35 mm² singles fit in a 50 mm conduit.
- Fit a motor circuitWhether four 6 mm² singles fit in a 25 mm conduit.
- Fit cables in an Australian conduitWhether four 4 mm² singles fit in a 25 mm conduit on the Australian sizes.
Voltage Rise6
- Check solar voltage riseThe voltage rise on a 45 m cable from a 5 kW inverter.
- Check rise on a three-phase inverterThe rise on a 10 kW three-phase inverter cable of 30 m.
- Check rise on a long rural runThe rise on 5 kW over 80 m.
- Check rise against a 2 % limitThe rise on a 3 kW inverter in Australia against 2 %.
- Check rise on a battery inverterThe rise on a 5 kW battery inverter over 15 m.
- Check rise on a 30 kW arrayThe rise on a 30 kW commercial inverter over 40 m.
Underground Cable7
- Bury a cable out to a shedThe depth of cover for a sheathed cable in heavy duty conduit.
- Bury a cable under a drivewayThe depth of cover under 75 mm of concrete.
- Bury a cable directThe category and depth for an armoured cable buried direct.
- Cross a water pipeThe separation from a water pipe of DN65 or less.
- Run a cable beside a gas pipeThe separation from a gas service.
- Bury a cable near an earth electrodeThe separation a conductive enclosure needs from the electrode.
- Run a conduit under a slabThe cover a conduit needs within a building.
Segregation and Separation6
- Separate power from signalThe separation the two circuits need on the route.
- Run data beside power in a wallThe separation between a power cable and a data cable.
- Put extra-low voltage in a switchboardWhat may share the enclosure at a switchboard.
- Share a conduit between two tenanciesWhether circuits of two occupancies may share a wiring system.
- Run a cable near a gas pipeThe separation from a gas pipe above ground.
- Separate fire alarm cable from powerThe separation a fire alarm circuit needs from low voltage.
Maximum Circuit Length6
- Find the longest run for a lighting circuitThe longest route a 1.5 mm² lighting circuit on a 10 A breaker can take.
- Find the longest socket circuitThe longest run for a 20 A circuit on 2.5 mm².
- Find the longest oven circuitThe longest run for a 32 A circuit on 6 mm², by voltage drop.
- Find the longest motor circuitThe longest three-phase run on a 16 A D-curve breaker.
- Find the longest run at 3 %The longest run when the drop limit is 3 %.
- Find the longest heat pump runThe longest run for a 16 A C-curve circuit on 2.5 mm².
Simplified Selector6
- Match a breaker to a 2.5 mm² cableThe largest breaker for a 2.5 mm² cable partly in ceiling insulation over 30 m.
- Match a breaker to lighting cableThe largest breaker for 1.5 mm² over 35 m.
- Match a breaker to 4 mm²The largest breaker for 4 mm² over 25 m.
- Match a breaker to oven cableThe largest breaker for 6 mm² over 15 m.
- Check a three-phase 10 mm² circuitThe largest breaker for 10 mm², three phase, over 40 m.
- Match a breaker in full insulationThe largest breaker for 2.5 mm² fully in insulation.
Minimum Conductor Size5
- Find the smallest control conductor allowedThe minimum copper size for a signal and relay control circuit.
- Find the smallest aerial conductorThe minimum aluminium size for an aerial run.
- Find the smallest flexible cordThe minimum size for a flexible cord.
- Find the smallest bare conductorThe minimum size for a bare conductor.
- Find the smallest parallel conductorThe minimum size a conductor in parallel may be.
Comms Cable Selector8
- Add an instrument loopA cable for the signal over a 150 m route.
- Select a comms cableA PROFINET cable for a 60 m run through a drag chain.
- Check an RS-485 runWhether 400 m at 115.2 kbps is in the limit.
- Check a long Modbus trunkWhether 1200 m at 9.6 kbps is in the limit.
- Check an Ethernet run past 90 mWhether a 110 m Ethernet run is in the limit.
- Pick a 24 V field supply cableA cable for a 24 V d.c. supply over 80 m.
- Pick a screened cable beside a driveA screened signal cable for a noisy area.
- Pick an outdoor Ethernet cableAn Ethernet cable for an outdoor run.
Site Cord Length5
- Check the length of a site leadWhether a 50 m, 15 A lead of 2.5 mm² is in the limit on site.
- Check a light-duty site leadWhether a 25 m, 10 A lead of 1.0 mm² is in the limit.
- Check two leads joinedWhether two joined leads stay in the limit.
- Check a coiled leadWhat a coiled lead does to the limit.
- Check a lead from a socket assemblyA lead that runs from a portable socket-outlet assembly.
Loop Power Budget6
- Check a 4-20 mA loop's power budgetThe supply, the series resistance and the cable give the voltage left at the transmitter.
- Check a loop with a HART resistorThe voltage left with a 250 Ω HART resistor in the loop.
- Check a loop through a barrierThe voltage left with 300 Ω of barrier in series.
- Check a 2 km loopThe voltage left on 1 mm² cable over 2000 m.
- Check a loop on a 12 V supplyWhether a 12 V supply drives the loop.
- Check a loop at fault currentThe voltage left at 22 mA.
DC Cable Size8
- Size a battery cableThe d.c. cable size for a 3 m, 48 V battery run at 100 A.
- Size a PV string cableThe d.c. cable for 14 A at 600 V over 30 m.
- Size a 12 V run in a camperThe cable for 8 A at 12 V over 6 m at 3 %.
- Size a 24 V control supplyThe cable for 10 A at 24 V over 40 m.
- Size an array cable on a hot roofThe cable for 28 A at 1000 V and 60 °C.
- Size a battery inverter cableThe cable for 250 A at 48 V over 2 m.
- Size a buried array cableThe cable to a ground-mount array, buried 0.6 m.
- Size a 48 V telecom feedThe cable for 60 A at 48 V over 15 m.
Correction Factors7
- Find the correction factors in a hot ceilingThe factor for four circuits in a 50 °C ceiling space, and the rating the cable needs.
- Find the correction factors for a buried cableThe soil, depth and grouping factors for two buried three-phase circuits.
- Find the factor for nine circuitsThe grouping factor for nine circuits on a tray.
- Find the factor on a 50 °C roofThe ambient factor at 50 °C.
- Find the factors in poor soilThe soil and depth factors at 2.5 K·m/W and 1 m.
- Find the factor for a harmonic loadThe factor for 40 % third harmonic in a four-core cable.
- Compare the factors in AustraliaThe same conditions on the Australian tables.
Protection
34IDMT Protection6
- Grade two relaysThe operating times of a feeder and an incomer relay at 4 kA.
- Grade a very inverse pairThe operating times of two very inverse relays at 6 kA.
- Grade three relays in seriesThe margins between three relays at 5 kA.
- Find a relay's time at ten times pick-upThe operating time of one relay at 2 kA.
- Check an instantaneous settingWhether a 4 kA instantaneous element clears an 8 kA fault.
- Grade an extremely inverse feederAn extremely inverse relay under a standard inverse incomer.
RCD Selection8
- Choose the RCD for an EV chargerThe RCD a 32 A home EV charger circuit needs in NZ.
- Check the RCD for house lightingThe RCD a lighting circuit needs in Australia.
- Check the RCD for a classroomThe RCD rule for socket-outlets in a school.
- Check the RCD for a child-care centreThe 10 mA rule where young children are.
- Check a measured RCD trip timeWhether 28 ms at rated current and 12 ms at five times pass.
- Choose the RCD for a patient areaThe residual current and times for a patient-protection RCD.
- Choose the RCD for a fixed machineWhether a fixed appliance in a workshop needs an RCD.
- Choose the RCD for a vending machineThe RCD rule for a ride or a vending machine.
Switchboard Form5
- Check the access to a main switchboardThe access clearances and separation rules for an 800 A main switchboard.
- Check access to a house switchboardThe clear space a domestic switchboard needs.
- Check a long board for two exitsWhether a 3.6 m board needs two exits.
- Check a board in a cupboardThe access for a 400 A board that is not in a room.
- Check the impulse clearancesThe clearance for a 6 kV impulse withstand.
Circuit Check7
- Check the breaker on a 4 mm² circuitWhether a 32 A breaker suits 4 mm² cable, and the largest breaker the cable allows.
- Check an existing three-phase submainWhether 16 mm² on a 63 A breaker over 80 m passes the cable, drop and Zs checks.
- Check a 20 A breaker on 2.5 mm²Whether a 20 A breaker suits a 2.5 mm² circuit.
- Check a 32 A breaker on 6 mm²Whether a 32 A breaker suits a 6 mm² circuit.
- Check a 16 A breaker on 1.5 mm²Whether a 16 A breaker suits a 1.5 mm² circuit.
- Check a 63 A breaker on 16 mm²Whether a 63 A breaker suits 16 mm² mains.
- Check a 10 A breaker on 1 mm²Whether a 10 A breaker suits a 1 mm² lighting circuit.
Fault Level at a Board8
- Find the fault level at a sub-boardThe fault current at a board 45 m from a 300 kVA transformer, against 6 kA breakers.
- Check breakers beside a 1000 kVA transformerWhether 25 kA breakers suit a main board 20 m from a 1000 kVA transformer.
- Find the fault level at a house boardThe fault current at the end of 20 m of 16 mm² mains.
- Find the fault level at a shedThe fault current 60 m down a 16 mm² submain.
- Find the fault level at an MCCThe fault current 30 m from a 500 kVA transformer.
- Check 6 kA breakers at a tenancy boardWhether 6 kA devices suit the fault level at the board.
- Find the fault level on parallel feedersThe fault current with two cables per phase.
- Find fault level from a 10 kA serviceThe fault current at a board in Australia.
Loads
62Maximum Demand8
- Size a house mainThe maximum demand of a house with a heat pump, from Table C1.
- Work out commercial maximum demandThe maximum demand of a tenancy from Table C2.
- Work out demand for a block of unitsThe demand of twelve units, four on each phase.
- Work out demand with spa and floor heatingThe demand of a house with heating and a spa pool.
- Work out demand for a caféThe demand of a café with cooking and refrigeration.
- Work out demand for a small factoryThe demand of a workshop with lighting, sockets and motors.
- Work out demand for a three-phase houseThe demand per phase of a large house.
- Work out demand for an office floorThe demand of a 400 m² office with air-conditioning.
Full Load Current6
- Find a 22 kW motor's full load currentThe line current a 22 kW three phase motor takes at 400 V.
- Find the current of a 7.2 kW chargerThe current of a single-phase 7.2 kW load.
- Find the current of 100 kVAThe line current of a 100 kVA load at 400 V.
- Find the current of a 3 kW heaterThe current of a 3 kW heater at 230 V.
- Find the current of a chillerThe current of a 45 kW chiller at 0.85 power factor.
- Find the current of a commercial ovenThe current of a 15 kW three-phase oven.
Motor6
- Size a motor circuitThe full load current of an 11 kW motor at 400 V.
- Find starting current of a 55 kW motorThe direct-on-line starting current at 400 V.
- Find the speed of a six-pole motorThe shaft speed of a six-pole motor at 3 % slip.
- Find the torque of a 7.5 kW motorThe full load torque of a four-pole 7.5 kW motor.
- Check a single-phase pump motorThe current of a 2.2 kW single-phase motor.
- Find the speed of a two-pole motorThe speed of a 4 kW two-pole motor at 50 Hz.
Battery6
- Size a battery bankThe bank capacity the loads need for the autonomy days.
- Size a 12 V battery for a camperThe Ah for a fridge and lights for one day.
- Size a 24 V PLC panel backupThe Ah to hold a 120 W panel for four hours.
- Size a bank for three winter daysThe Ah for three days of autonomy.
- Size a lithium bankThe Ah at 90 % depth of discharge.
- Size a bank for a cold siteThe Ah with a cold-temperature factor.
Circuit Loading6
- Load a control panelThe load on each circuit in the panel.
- Count sockets on a house circuitThe loading of twelve 10 A socket-outlets on a 20 A circuit.
- Count lights on a circuitThe loading of thirty lighting points on a 10 A circuit.
- Load a kitchen circuit with a hobThe demand of a 7.2 kW hob on its circuit.
- Load an office socket circuitThe loading of eight 10 A socket-outlets on a 20 A office circuit.
- Apply diversity upstreamThe loading of a submain that feeds six circuits.
Max Demand by Phase4
- Balance a house demand across three phasesThe maximum demand on each phase of a three phase house, from Table C1.
- Balance an office fit-outThe demand on each phase of an office, from Table C2.
- Balance a block of unitsThe demand on each phase of nine units.
- Balance a workshop with a welderThe imbalance a single-phase 32 A welder outlet makes.
Lighting Lumen Method11
- Light a kitchen by the lumen methodHow many downlights a kitchen needs for its target lux, in a grid.
- Light a garage with battensHow many LED battens a garage needs, laid out in rows.
- Light an office to 320 lxHow many panels an office needs to AS/NZS 1680.1 Table 3.1, with the spacing check.
- Light a warehouse with high baysHow many 20 000 lm high bays a 30 by 20 m bay needs.
- Light a corridorHow many downlights a 12 by 1.5 m corridor needs.
- Light a bathroomHow many downlights a 3 by 2.4 m bathroom needs.
- Light a living roomHow many downlights a 6 by 4.5 m living room needs.
- Light a bedroomHow many downlights a 3.6 by 3.2 m bedroom needs.
- Light a switchroomHow many battens a 5 by 3 m switchroom needs.
- Light a classroom to 320 lxHow many panels a 9 by 7 m classroom needs at a target you set.
- Light a dusty workshopThe count with a maintenance factor from Table 14.4.
EV Charger Circuit9
- Charge an EV from a home socket-outletThe circuit a mode 2 charging lead needs on a home socket-outlet.
- Check spare capacity for an EV chargerWhether a 7 kW charger fits a 63 A board that already carries 40 A.
- Add EV chargers to an Australian car parkWhether four 22 kW chargers fit a 400 A board, with and without load management.
- Add a 22 kW charger to a houseThe cable, RCD and headroom for a three-phase charger.
- Add a charger with load managementThe headroom when the charger is limited to 16 A.
- Add a second charger to a houseThe headroom with two 32 A chargers.
- Choose a charger RCD without d.c. detectionThe RCD type when the station has no 6 mA d.c. detection.
- Size a long charger runThe cable for a 32 A charger 40 m from the board.
- Add six chargers to an apartment car parkThe demand and supply for six chargers in New Zealand.
Power Factor Correction6
- Correct a factory power factorThe kvar and bank steps to lift a 250 kW load from 0.78 to 0.95.
- Free supply capacity with power factor correctionThe kVA a 400 kVA site gets back when its power factor rises to 0.98.
- Correct a motor boardThe kvar to lift a 75 kW motor load from 0.82 to 0.95.
- Choose the capacitor stepsThe bank in 25 kvar steps for a 300 kVA load.
- Check a bank for resonanceThe bank against the fault level and 20 % harmonic load.
- Correct a single-phase loadThe kvar for a 15 kW single-phase load at 0.7.
Power
15Three Phase Power5
- Convert amps to three phase powerThe kW and kVA of a 63 A three phase load at 400 V.
- Find kW from a clamp readingThe kW of 100 A at 0.8 power factor.
- Find the kVA of a single-phase loadThe kVA of 40 A at 230 V.
- Find the reactive power of a loadThe kvar of 50 A at 0.7 power factor.
- Turn a meter reading into kWThe kW from a metered current and power factor.
Transformer5
- Check a transformer secondaryThe secondary current and the fault level of a 1000 kVA unit.
- Find the currents of a 500 kVA transformerThe primary and secondary currents of a 500 kVA unit.
- Find fault level of a 300 kVA unitThe secondary fault current at 4 % impedance.
- Check an isolating transformerThe currents of a 5 kVA single-phase unit.
- Check a 22 kV transformerThe primary current of a 1500 kVA, 22 kV unit.
Generator5
- Check a 60 kVA standby generatorThe full load current and the fault current of a 60 kVA set at 400 V.
- Check a 200 kVA generatorThe full load current of a 200 kVA set at 400 V.
- Check a portable generatorThe current of a 10 kVA single-phase set.
- Find a generator's fault currentThe fault current of a 500 kVA set at 15 % reactance.
- Check a holiday park backup setThe current and fault level of a 150 kVA set.
Solar
14PV String Sizing8
- Size solar strings for a 600 V inverterThe modules per string for 49.5 V modules on a 600 V inverter at −5 °C.
- Check string fuses on three parallel stringsWhether three parallel strings of 13.9 A modules call for string fuses, and their rating.
- Size strings for a 1000 V inverterThe modules per string for a commercial inverter.
- Size strings for a cold inland siteThe modules per string at a record low of −8 °C, on a 600 V inverter.
- Check a string on a hot roofWhether the hot voltage stays above the tracker's minimum.
- Check two strings need no fuseWhether two strings in parallel need string fuses.
- Check the array current at the inverterThe array's short-circuit current against the inverter input.
- Size strings for a house trackerThe modules per string for a 450 V window.
Home Battery6
- Size a solar battery for a family homeThe kWh a 25 kWh a day home needs to run its evenings on an 8 kW array.
- Check where a home battery can goThe AS/NZS 5139 rules for a battery on a garage wall backing onto a bedroom.
- Size a battery for the evening peakThe kWh to carry 60 % of 22 kWh a day into the evening.
- Size a battery for 6.6 kW of solarThe battery for a 6.6 kW array and a home using 18 kWh a day.
- Size a battery for a day of backupThe battery for one day of backup with a 5 kW peak.
- Size a battery in 5 kWh modulesThe number of 5 kWh modules a home using 24 kWh a day needs.
Safety
38Arc Flash7
- Estimate arc flash energy at an MCCThe incident energy at 455 mm from a 25 kA MCC, cleared in 0.15 s.
- Estimate arc flash at a main switchboardThe incident energy at 40 kA cleared in 0.3 s.
- Estimate arc flash at a distribution boardThe incident energy at 10 kA cleared in 0.1 s.
- Estimate arc flash in open airThe incident energy with no enclosure.
- Estimate arc flash at 11 kV switchgearThe incident energy at 11 kV and 12 kA.
- Find the boundary at a longer reachThe incident energy and arc flash boundary at a 600 mm working distance.
- Compare a faster clearing timeThe incident energy of a 25 kA fault cleared in 0.05 s.
Construction Site Supply6
- Supply a building site from a generatorThe RCD protection for tools on a construction site generator.
- Supply a site from the house boardThe rules when the permanent switchboard feeds the site.
- Supply site wiring from an inverterThe rules for an RCD-protected inverter supply.
- Supply a welder from a generating setThe rule for an arc welder built into a generating set.
- Use hire equipment on a siteThe inspection and RCD rules for hired equipment.
- Supply a site in AustraliaThe same pole against the Australian rules.
Show and Carnival Wiring6
- Supply a show ring from a generatorThe RCD and wiring rules for 32 A circuits at a show on a generator.
- Supply a food stallThe RCD rules for a 16 A stall circuit from the network.
- Check a buried cable at a fair groundWhether 0.5 m of cover is enough where pegs are driven.
- Check an aerial over a walkwayWhether a 3 m aerial height passes.
- Supply an amusement rideThe rules for a 63 A circuit that feeds a ride.
- Supply a market in AustraliaThe show rules in Australia for a 20 A circuit.
Wet Area Zones12
- Check a downlight over a showerWhether an IP20 downlight 0.5 m from a 2.4 m ceiling rose passes.
- Put a socket-outlet by a basinThe zone and the conditions for a socket-outlet 0.1 m from a basin.
- Light a spa poolThe zone and IP rating for a light 1 m from a 1500 L spa.
- Put a socket-outlet beside a bathThe zone and the conditions 0.4 m from a bath.
- Put a switch in a bathroomThe zone for a light switch 0.7 m from a shower.
- Put a socket-outlet by a kitchen sinkThe zone and the conditions 0.2 m from a sink.
- Light a swimming pool surroundThe zone and IP rating for a light 2 m from a pool.
- Put a socket-outlet near a poolWhether a socket-outlet 3 m from a pool passes.
- Fit a light in a saunaThe zone for a luminaire above a sauna heater.
- Light a fountainThe zone and IP rating for a light in a fountain.
- Check a communal shower roomThe IP rating a communal shower asks for.
- Check a bathroom in AustraliaThe same shower against the Australian printing.
Obtrusive Light7
- Check a car-park floodlight at a boundaryWhether a 20 000 lm floodlight 15 m from an upstairs window passes after the curfew.
- Check a bollard path at a boundaryWhether a 500 lm bollard 5 m from a neighbour’s window passes in zone A3.
- Check a tennis court floodlightWhether a 40 000 lm floodlight 20 m from a window passes.
- Check a security light on a houseWhether a 2000 lm wall light 8 m from a neighbour passes.
- Check a light in a rural zoneThe same light in zone A1.
- Check a loading dock before the curfewA dock floodlight against the pre-curfew limit.
- Check the upward light of an uplightThe upward light ratio of a façade uplight.
Earthing
11Earthing and Bonding6
- 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.
Screen and Drain Earthing5
- Earth a cable screenWhere to earth the screen and the drain wire.
- Earth an armoured cableWhere the armour of a power cable is earthed.
- Earth a drive cable's screenWhere the braid of a motor cable is earthed for EMC.
- Earth an instrument screen at one endHow a foil screen avoids a hum loop.
- Earth a drain wireWhere the drain wire of a signal cable is earthed.
Testing
13Test Results6
- Check the test results of a new circuitWhether the insulation, earth, Zs and RCD readings pass on a 16 A circuit.
- Check a low insulation readingWhether 0.5 MΩ passes on a final subcircuit.
- Check Zs on a 32 A circuitWhether 0.6 Ω passes on a 32 A C-curve circuit.
- Check a slow RCDWhether a 30 mA RCD that trips in 45 ms passes.
- Check a five-second circuitThe Zs limit for a submain with a 5 s disconnection time.
- Check earth continuity on a lighting circuitWhether 0.9 Ω passes on 1.5 mm².
Test and Tag7
- Tag a workshop angle grinderThe retest interval and the pass marks for a Class I tool in a workshop.
- Tag a kettle in an officeThe retest interval for a Class I appliance in an office kitchen.
- Tag a double-insulated drillThe interval and insulation limit for a Class II tool.
- Tag a hire extension leadThe interval for hire equipment.
- Test a portable RCDWhether a portable RCD that trips in 25 ms passes.
- Tag cleaning equipmentThe interval for commercial cleaning equipment.
- Check a leakage readingWhether 3 mA of leakage passes on a Class I heater.
Fire
21Sounder Level6
- Set the sounder level in a plant roomThe alarm level a sounder must reach over 78 dB of plant noise.
- Set the sounder level in a bedroomThe level at the bedhead in sleeping accommodation.
- Set the level where ear protection is wornWhether a visual device is needed with ear protection.
- Set the level for a voice systemThe level over ambient for a voice alarm.
- Set the level on a balconyThe level a sounder must reach on a balcony.
- Set the level in a quiet officeThe level a sounder must reach over 45 dB of ambient sound.
Fire Alarm Cabling4
- Choose the cable for a sounder circuitThe minimum conductor size for a fire alarm alerting device circuit.
- Choose the cable for a detector circuitThe minimum conductor for a four-core detector circuit.
- Choose the cable for a transmission pathThe fire rating a transmission path needs.
- Choose the cable for staged evacuationThe cable for a staged evacuation circuit.
Fire Alarm Battery5
- Size a fire panel batteryThe battery capacity for 0.35 A on standby and 2.5 A in alarm.
- Size a battery for an unmonitored panelThe capacity for 72 hours of standby.
- Size a battery with ageingThe capacity with ageing and temperature factors.
- Size a small panel batteryThe capacity for 0.1 A standby and 0.8 A alarm.
- Size a 24-cell panel batteryThe capacity of a 48 V panel.
Detector Spacing6
- Space smoke detectors in an officeThe number of point smoke detectors for a 24 by 15 m office.
- Space heat detectors in a kitchenThe number of point heat detectors for a 6 by 5 m kitchen.
- Space smoke detectors in a corridorThe detectors for a 30 by 1.8 m corridor.
- Space detectors under deep beamsThe count with 400 mm beams at 1.2 m centres.
- Space beam detectors in a warehouseThe beam smoke detectors for a 60 by 30 m warehouse.
- Space line heat detection in a car parkThe runs of line heat detection for a 40 by 16 m bay.
Regulatory
17Regulatory Pathway8
- Find the paperwork for a home solar jobThe work category and the certificates a home PV alteration needs in NZ.
- Find the paperwork for a new houseThe certificates a new domestic installation needs.
- Find the paperwork for a like-for-like repairThe category of a replacement in an existing installation.
- Find what a homeowner may doThe limits on a homeowner's own wiring work.
- Find the paperwork for mains workThe inspection mains work needs.
- Find the paperwork for a hazardous areaThe category and inspection for a hazardous area job.
- Find the paperwork for a medical fit-outThe category and inspection for a patient area.
- Find the paperwork for a generator connectionThe category for mains-parallel generation.
Assessment Intervals6
- Find the inspection interval for a marinaHow often a marina installation must have an assessment in NZ.
- Find the interval for a construction siteThe verification intervals for a construction site.
- Find the interval for a carnivalHow often show wiring must have an assessment.
- Find the interval for a hazardous areaThe inspection standard for a hazardous area.
- Find the interval for a medical areaThe assessment a medical installation must have.
- Find the fire alarm test intervalsThe monthly and annual checks NZS 4512 lists.
Builders and guides
11Builders7
- Plan a house layoutRooms and points become circuits, cable sizes and a maximum demand.
- Draw a plan of the jobRooms and devices on a plan become points, circuits and a schedule.
- Lay out fire detectors in a roomThe spacing calculator sets the grid, and the plan places the detectors.
- Lay out luminaires for a target luxA stated lumen estimate places a grid of luminaires in a room.
- Draw an instrument loop with tagsInstruments, runs and a controller become a loop with a cable check.
- Build an asset listAssets, their interfaces and the cables that link them, each checked by a calculator.
- Size the submains of a siteBoards and their loads become submains sized from each board's demand.