where can I find information on the max. distance between power poles?? Where can I get spec's on high voltage cables??

Do you mean Utility Distribution power poles, low voltage temporary power poles [eg. 120/240 1 ph. 3 wire], or the power poles used in Offices [Receptacles and LAN Data / Comm outlets]?

For Medium and High Voltage Cable / Conductor data, check out one of the many Electrical Engineering manuals or standard handbooks which are available at your local Library [or tech bookstores].

Scott. SET

Article 225 gives some guidelines, but you would most likely find the "National Electrical Safety Code" a much better reference. There is a lot of material in the "American Electricians Handbook" as well as the "Lineman and Cablemens Handbook" all usually available from Amazon.com or Borders, same place now days. The NESC is the code reference BTW

Uli,
If this is in relation to an installation in Ontario, Canada follow Section 75 for related info.

75-244 Pole Spans and Framing

(1) Poles used in secondary lines shall be placed not more than 40 m apart.

(2) Subject to Subrule (3), poles used in primary lines shall be placed not more than 90 m apart.

(3) Poles used in primary lines shall be framed as per following specifications:

Specification 9 - Primary, 1Ø, 2.4 to 8 kV, Maximum span 90 m.

Specification 10 - Primary, 1Ø, 2.4 to 16 kV, Maximum span 90 m.

Specification 11 - Primary, 3Ø, 2.4/4.16 to 8.0/13.8 kV.

Specification 12 - Primary, 3Ø, 2.4/4.16 to 16/27.6 kV.

Specification 13 - Primary, 3Ø, Line Angles 4°-90°, 2.4/4.16 to 16/27.6 kV.

Specification 14 - Primary, 3Ø, Crossarm, 2.4/4.16 to 16/27.6 kV.

Specification 15 - Primary, 3Ø, Underbuilt, 2.4/4.16 to 16/27.6 kV.

Specification 16 - Primary, 3Ø, 44kV.

Specification 17 - Primary, 3Ø, Line Angles 4°-90°, 44 kV.

Specification 18 - Primary, 3Ø, Crossarm, 44 kV.


Tony Moscioni
Electrical Inspector
© Electrical Safety Authority