Spacing between multiple overhead lines
Spacing between multiple overhead lines
(OP)
Hello,
I am working on a project where we need multiple overhead circuits running in parallel. On each pole there will be 2 circuits (one on either side of the pole). Further to this we need 4 powerlines running in parallel for approx 800m.
I have searched everywhere for rules and standards or engineering advice on what the separation between poles should be but cannot find anything. I have the separation between pole and vegetation, house, personell etc etc.
But I do not know if there is some guidelines of ditance between parallel powerline poles.
Thanks UKgrad
I am working on a project where we need multiple overhead circuits running in parallel. On each pole there will be 2 circuits (one on either side of the pole). Further to this we need 4 powerlines running in parallel for approx 800m.
I have searched everywhere for rules and standards or engineering advice on what the separation between poles should be but cannot find anything. I have the separation between pole and vegetation, house, personell etc etc.
But I do not know if there is some guidelines of ditance between parallel powerline poles.
Thanks UKgrad






RE: Spacing between multiple overhead lines
Utilities should have standards for that. Ask colleagues.
RE: Spacing between multiple overhead lines
RE: Spacing between multiple overhead lines
RE: Spacing between multiple overhead lines
There is nobody at my workplace that can help on this. I have read NESC standard and its talking in mm. As Desrod 22 said I would have thought you need space for a boom truck. I was thinking of allowing 10m between powerlines, but I am not sure if this is reasonable?
Does anyone have any documents or experience based on utilities or other designs?
Is not inductive coupling an issue? Probably not for such a short distance <1km.
Thanks
RE: Spacing between multiple overhead lines
RE: Spacing between multiple overhead lines
my rule of thumb is on say 13 metre pole 2metre in the ground 11metre above so clearance of adjacent line 11 metre.
Regards
RE: Spacing between multiple overhead lines
In my utility, we consider things such as:
- allow conductors of one tower to swing towards conductors of an adjacent line (which for conservatism, is assumed at rest). Ensure you have switching surge and/or power frequency clearance between the lines.
- consider maintenance requirements. Do you need space for a boom struck, crane, helicopter, etc? Do you require helicopter landing pads? Is there space for stringing equipment to work, or will you pay compensation to landowners for damages?
- if guyed structures, ensure you have sufficient clearance to the guys. Also, ensure guys will not be too close together - or you may affect the bearing capacity of the soil.
- Do you need to consider fall-over of one tower, into the other lines? Reliability requirements may require this, many may not.
Hope that gives you a few ideas of what to consider!