How to distribute electricity in the area - country magazine
How to distribute electricity around the site kolyaseg wrote on June 7th, 2012
When planning the distribution of electricity on the site, a lot of questions arose:
Is this where to put the pole, or do you need to lead the wire straight from the poles to the change house?
What should be the post (height, wood/metal)?
Can the wires be led underground in general, or is it necessary on top?
What distance should be between the supports for the power cable (between the pole and the house)?
Now we have the main question, . Maybe some other way to arrange everything initially?
Here is a planchik we drew on the forum "City of Masters". Power line poles - this is perhaps the only constant at the moment in this equation.
For questions:
How high should the pole be?
The branch wires must be at a height of:
- not less than 2.75 m above the ground
- above footpaths at a height of at least 3.5 m,
- above driveways - not less than 6 m.
The distance between the supports or between the support and the building - no more than 25 m
If the building is low and it is impossible to provide the required height of the wires above the ground, they are entered using a pipe rack, called the “gander” by fitters.
It is installed on the roof or on the wall. In the first case, the wires should be at a height of 2.5 m above the roof. The column usually consists of a piece of wood on a concrete stepson. By the way, by the link, instructions for installing poles.
If you run cables underground?
In the ground - much more aesthetic, but somewhat more expensive. Before descending underground, it is necessary to install a disconnector on a support (you can use a simple switch in a box)
Also under the road - only in an asbestos-concrete pipe with an exit beyond the road by 2 m in each direction. In this case, the cable should be armored type VBbShv or AVBbShv. If you use the VBbShvng cable, then it can also go inside the room directly to the inlet shield. Cable 0.7 m from the surface is standard. If there are beds above the cable, then the cable must be buried for 1 m. Deeper - it makes no sense, smaller - not supposed to. Under the road - any cable in an asbestos-cement pipe. Armor - against mice, a pipe - against crushing and breaking the cable in the ground by heavy vehicles. If the pipe is made up of segments, then the use of a coupling is mandatory. In the ground - the cable is desirable only in armor. In steel pipes - prohibited. A typical solution for serious projects, where the customer does not try to save on his own peace of mind, is VBbShv in a double-walled HDPE / HDPE in a trench with a seeded sand cushion, with a signal tape.
UPDATE: We talked to an electrician. The electrician said that the main thing is to keep 5 meters above the passage and the distance between the supports is a maximum of 30, then he agreed to 40 meters.