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Is there any rules about distances of Aerial mains from trees?

From what I can see 3000 only mentions "structures" and I don't think a tree is a structure.

And NZECP34 1.1.4 says the code does not apply to hazards from trees so that's as far as I got.

Any input much appreciated.

Correct a tree is not a structure
While "3000" doesn't set specific required clearances from vegetation; it does require all external influences that can be reasonable expected to be considered when installing wiring systems, including "flora" (vegetation) [3.1.2 & 3.3.2.9].
Which means the installer has to consider the size existing plants may grow to; but can't be expected to allow for plants that might arrive later.


There are requirements for landowners to keep trees clear of lines (works), depending on voltage.
Google will find them.
It would be reasonable to also apply those clearances to aerial conductors of installations; at least for individual conductors.
Neutral screen is far less of a problem.
For lines, work on trees is restricted by network rules; eg within 4 m only qualified arborists who have been approved by the network.
Similar should apply WRT private conductors, as the risks are similar.
Not a good idea to have amateur tree-trimmers near live wiring systems.

The longer-term problem is not so much risk of shock, as risk of loss of supply due to tree(s) damaging conductors.
If adequate clearance isn't maintained, who suffers? Generally the person who should have done the (tree) maintenance.

AS/NZS 4836 provides (some) guidance on working near overhead wiring

Thanks much appreciated.

Have a read of the Electricity (Hazards from Trees) Regulations 2003 Schedule Growth limit zones for some more information

https://www.legislation.govt.nz/regulat ... 33405.html
https://www.worksafe.govt.nz/laws-and-r ... h%2C%20and

Sparkznz wrote: ↑

Thu Sep 23, 2021 1:53 pm

Have a read of the Electricity (Hazards from Trees) Regulations 2003 Schedule Growth limit zones for some more information

https://www.legislation.govt.nz/regulat ... 33405.html
https://www.worksafe.govt.nz/laws-and-r ... h%2C%20and

This is the correct way to compliance, the network rules are invented by them with no legal standing. Tree regs, esr, and ecp 34.

They can all be applied to a customer owned line.

If a network ever physically disconnects your line ask them if they received permission from the line owner (you) to touch that line! The distances in ecp 34 related to the point of supply create some interesting situations.

Thanks for the info much appreciated

Most networks will provide a service fuse isolation free of charge for any work needing done near your open service lines ie. Painting, facade repairs and tree trimming. Would be best to give them a call and see if that applies in your area.