More examples & information related to Aerial Electrical can be found here:
Aerial Electrical Cables
Two Phase Electrical Service
Underground Electrical Power
Cables running behind multi-level properties at a height between the
floors are called "Mid-Span". These cables are normally a combination of
unmetered utility power and utility communication. They are meant to service
each property and are easy to make changes for changes in tenants.
These are privately owned utility poles which may have multiple power supply
distribution circuits and at different voltages. The highest voltage on the pole
is always at the top. Tensioning these cables requires specialized equipment and
know-how. The creosote treated poles start out a very dark brown or near black
but eventually fade to a regular brown color, or a lighter brown. It is one of
the most common wood preservatives used in the United States. Creosote is made
from a wide range of chemicals and is divided into two types. The first type is
wood creosote which is created through the heating of beechwood or creosote
bush. The more common type of creosote is created when coal is heated to produce
coke (a cleaner burning form of coal) or natural gas. This process produces coal
tar creosote, coal tar, and coal tar pitch, which are all mixtures of similar
compounds and are referred to here simply as creosote.
Guy-Wires are used to counter aerial cable tensioning. Cable weight is obviously
increased with the distance of it's span. The guy-wires are needed to keep the
pole from leaning over time. Guy-wires require specialized equipment, hardware
This is a CCA treated pole, Chromate Copper Arsenate, which
is a wood preservative that has been used for timber treatment since the
mid-1930s. It is a mix of chromium, copper and arsenic (as Copper(II) arsenate)
formulated as oxides or salts, and is recognizable for the greenish tint it
imparts to timber. CCA is known by many trade names and is the world's most
widely used wood preservative. It is manufactured to national and international
standards. New poles start out with a yellowish olive green color and do not
fade much. The wood patterns also show up more on the CCA treated poles as the
New installations must be performed with an auger boom. A pole is buried
according to this formula: 10% of the poles height
+ 2 Feet. eg. For a 45' Pole, the pole would be buried in a hole 6'6" deep.
Aerial Cables -
Metering Equipment. These are "Mid-Span" utility cables which require mast
brackets in order to raise them above the low roof line. These are three-phase
cables with a combination of old services and a newly upgraded electrical
service. This photo shows the ability to upgrade the incoming service or
disconnect an old service which is the advantage of mid span cables.
Aerial Cables - to
Parking Lot Light Pole.
Multi-purpose utility poles require plenty of initial planning and design for
the aerial cables and guy wires being attached.
Aerial cable temporary power connection using tri-plex and a service mast due to break in underground power.