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Rotorua, Bay of Plenty

Electricians in RotoruaWhere the air itself is hard on wiring.

Looking for an electrician in Rotorua? Tell us what's going on and we'll match the job with one licence-checked local electrician who handles that kind of work. For a power cut, Unison says Rotorua households should go to their electricity retailer first.

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The Tudor-style Rotorua Museum building behind the lawns and paths of Government Gardens.
Photo: Szilas, Wikimedia Commons

Why Rotorua is hard on electrical fittings

Rotorua sits on a geothermal field, and the gas from its steam vents is hydrogen sulphide. Unison, the lines company here, says that gas is very corrosive to many of its own assets. BRANZ tested metals around the city and found copper the most vulnerable, corroding heavily even where hydrogen sulphide levels were low.

Your wiring and switchboard connections are copper, and so is the pipework on a heat pump's outdoor unit. When copper corrodes at a connection, the result can be blackened terminals, intermittent faults or a fitting that fails early. How bad it gets depends on the street: BRANZ found airborne hydrogen sulphide near Sulphur Bay averaged around 500 times the lowest reading in the far west of the city.

Rotorua's lines, weather and ground

Lines company: Unison

Unison runs the network in Rotorua and handles every connection, from a single house to a new subdivision. For fallen lines, Unison asks you to call 111 first, then 0800 2 UNISON (0800 2 86476).

Retailer first in a power cut

In Rotorua and Taupō, Unison says your electricity retailer is the first point of contact when the power or the hot water is out. Check your own switchboard for a tripped switch first.

Thunder and twisters

NIWA says Rotorua records the most thunder in the Bay of Plenty, 12 days a year. A tornado on 1 June 2005 cut electricity to 1,000 homes, and storms in late April 2018 led to a state of emergency.

Ground that moves

Unison says geothermal activity around Rotorua and Taupō can cause ground subsidence (tomos) that affects both underground and overhead network assets.

Lines down after a Rotorua storm

Unison warns that electricity can travel through soil, water, metal or even people up to 8 to 10 metres from a fallen line. Keep everyone and every pet well clear, call 111, then Unison. If a line lands on your car, stay inside and don't touch the metal.

The jobs that come up most in Rotorua

Fault finding. Corroded connections can cause flickering lights, dead power points and breakers that trip for no obvious reason. A sparky who knows geothermal homes checks the terminals, not just the fitting.

Switchboard work. An old board with blackened connections, rewireable fuses or no RCDs is usually worth replacing rather than patching. RCDs are the switches with a test button that cut the power when current leaks.

Rentals. At the 2023 Census, 35.47% of households in Rotorua District didn't own their home or hold it in a family trust. Healthy homes heating and extractor fans, plus smoke alarms, make up much of the landlord work, and landlords can't do any of it themselves unless they're licensed.

Heat pumps. Outdoor units here live in the same air as everything else, so it's worth asking the installer how they protect the connections.

Worth asking a Rotorua electrician

  • How often do you work on geothermal-affected wiring?
  • What do you look for in the switchboard terminals?
  • Will this job need a Certificate of Compliance, or just an Electrical Safety Certificate?
  • Can I see your licence ID before you start?

Where we'd start

If lights flicker or power points die on and off in a Rotorua house, we'd book an electrician who works on geothermal homes to check the switchboard connections before replacing fittings one by one. A blackened board is the clue. And if the whole street is dark, ring your retailer, not a sparky.

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Questions

Straight answers.

Does geothermal gas really damage wiring in Rotorua?

It damages copper. BRANZ found copper corroded heavily in Rotorua's air, even in low hydrogen sulphide areas, and Unison says the gas is very corrosive to its network equipment. Exposed connections and terminals are where it shows.

Who do I report a Rotorua power cut to?

Your electricity retailer first, Unison says. For a fallen line, call 111 and then Unison on 0800 2 UNISON.

My landlord won't fix a dead power point. Can I do it?

No. Tenants and landlords can't do electrical work in a rental unless they're registered and hold a current practising licence. Tell the landlord in writing, and they'll need a licensed electrician.

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Related help

Helpful next

Electricians in the Bay of PlentyPowerco, Unison and Horizon contacts, geothermal corrosion, storms and growth across the Bay of Plenty.Electrical repairs and fault findingDead power points, tripping and flickering: what to check safely, and what a repair should come with.Switchboard upgradesOld fuses, no RCDs or no room for a charger: when to upgrade, and the certificates and inspection to expect.Flickering lightsWhat a flicker in one light, one room or the whole house usually means, and who to call for each.Extractor fans and heating for healthy homesFan sizes, fixed heating and the records landlords keep: the electrical side of the healthy homes standards.Electricians in TaupōHoliday homes, Unison's outage advice, geothermal corrosion and the jobs Taupō owners ask a sparky for.

Where this information comes from

Rules change, so check with the EWRB, WorkSafe or Tenancy Services if something matters to your job. How we write and check these pages.

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