SpanGuard EHV
115KV+ Markers
Developed for installation on higher voltage lines (up to 500KV), our EHV markers have a special coating and other design features to reduce corona effects that can lead to burning or melting with standard markers.
Our markers are routinely installed on by helicopter, as shown in this video. As with all SpanGuard markers, our EHV markers use spiral wire preforms for secure attachment and are made of durable ABS with superior color retention. Available in 24” and 36” diameters.
SpanGuard Brochure (PDF)
SpanGuard EHV Applications
For over 50 years, SpanGuard markers have been saving lives and protecting valuable power lines by making them visible to low flying aircraft. Because of their durable construction, easy installation, and "line friendly" performance, SpanGuard markers have been chosen by over 2000 utilities, and all are repeat customers. See the SpanGuard User List.
The FAA advises that 36" markers be used on high transmission lines and hazardous river crossings. Smaller 20" markers are permitted on less extensive power lines or on lines in approaches to airports below 50 feet. Each marker should be a solid color—international orange, white, or yellow--and the FAA suggests that alternating colors be used on critical lines to optimize visibility in all seasons. (Orange alone may be difficult to see against fall foliage). See the FAA Advisory for Markers.
SpanGuard EHV markers are designed with a special coating and other features for installation on power lines up to 500KV. While non-EHV markers can be successfully installed on lines as high as 135–150KV, corona effects can burn or melt them if they are damaged (bird nests, hunters’ bullets, rain contaminants, etc.). For this reason, P&R Technologies recommends that EHV markers be installed on energized lines above 115KV.
SpanGuard User List
Alabama Power Co.Algonquin Gas Co.
Anoka Electric Coerative
Appalachian Power Company
Arkansas Aeronautics Commission
Arkansas Power & Light Co.
Bancroft Mun. Light
Bandera Electric Co
Bangor Hydro-Electric Co.
Bethlehem Steel Co.
Big Bend Electric Co. Inc.
Bonneville Power Administration
Border States Electric
Braund, Inc., Anchorage, Alaska
Brown & Root, Inc., Evadale, Texas
California Pacific Utilities
Carlton County Co-Operative Power Assn.
Carroll Electric Coerative Inc.
Cedar Falls Utilities
Central Illinois Light Company
Central Louisiana Electric Co.
Central Louisiana Power & Light Co.
Central Power & Light Co.
Central Rural Electric
Central Texas Electric Co.
Charles T. Parker Construction
Cherokee County Electric Co.
Chesapeake & Potomac Tel. Co. Of Md.
Chugach Electric Assn., Inc.
Cincinnati Gas & Electric Co.
Citizens Utilities, Kingman, Ariz.
City Of Bonners Ferry Light Dept.
City Of Cadillac, Michigan
City Of Clarksdale, Miss.
City Of Jacksonville, Fla.
City Of Merrill, Wisconsin
City Of Riverside, Calif.
City Of Tacoma, Washington
City Public Service Board, Texas
Coast E.P.A., Bay St. Louis
Comision Ejecutiva Hidroelectrica
Commonwealth Electric Co.
Community Electric Coerative
Community Public Service Co.
Connecticut Light & Power Co.
Consumer Power Co.
Copper Valley Electric Assn., Inc.
Corps Of Engineers, Walla Walla, Wn.
Crawford Electric Co.
Cummins Supply Co.
Dairyland Power Co.
Deaf Smith Co. Electric Co., Inc.
Delmarva Power & Light Co. Of Maryland
Department Of Army, Maryland
Detroit Edison Company
Dolden Electric Ltd.
Douglas Electric Co.
Dunkirk & Fredonia Telephone Co.
Eastern Iowa Light & Power Co
Eastern Shore Service Co. .
Easton Aerial Spraying
Elec-Tel Supply Co.
Electric Supply Co. Of Galveston, Tex.
Elmendorf Air Force Base
Empire Electric Co.
Erie Mining Co.
Farmers Electric Co., Inc. Of N. Mexic
Federal Aviation Administration
Fitchburg Power & Light Co.
Florida Power & Light Co.
Florida Power Corp.
Fort Hood, Texas
Fort Riley, Kansas
Four-County.Electric Power Assoc.
Georgic`. Power Co.
Glacier Electric Co.
Golden Valley Electric
Golden West Telephone Co.
Graybar Electric Co., Inc.
Gulf Oil Corporation
Gulf Power Co.
Gulf States Utilities Co.
Hancock-Wood Electric Co. Inc.
Hawaiian Electric Co.
Hill Co. Elec. Co
Home Light & Power Co., Greeley, Colo.
Homer Electric Assn., Inc.
Honolulu International Airport
Hydro-Electric Power Comm. Of Ontario
Inland Power & Light Co.
Interstate Power Co.
Iowa Electric Light & Power Co.
Iowa Public Service Co.
Iowa-Illinois Gas & Electric Co.
Irby Construction Co.
Israil Electric Corp., Ltd.
Jack Pruzan Co.
Jamaica Public Service Co.
James Valley Electric Co, Inc.
Jefferson Davis Electric Co., Inc.
Jersey Central Power & Light Co.
Kandiyohi Co Electric Assn.
Kansas Power And Light Co.
Kenai City Light, Alaska
Kimble Electric Co
Korea
Lake Region Electric Co Assn.
Lane County Electric Co., Oregon
Laredo Air Force Base
Long Island Lighting Co.
Louisiana Electrical Wholesalers, Inc.
Louisiana Power And Light Co.
Lower Valley Power And Light, Inc.
Lowry Air Force Base
Lts Electro System
Ludington Pumped Storage Project
Maine Electric Power Co.
Matanuska Electric Assn., Inc., Alaska
Maui Electric Co., Ltd., Hawaii
Maydwell Hartzell
Mc Leod Co Power Assn.
Mille Lacs Electric Co., Minn.
Minnesota Microwave Co.
Minnesota Power & Light
Minnesota Telephone Co.
Minnkota Power Coerative
Mississippi Power & Light Co.
Missouri Power And Light
Montana-Dakota Utilities
Moon Lake Electric Assn.
Municipal Utilities Of Cedar Falls
Natin Village Of Tyonek, Alaska
Naval Ordinance Test Station
Naval Underseas Warfare Center
Nebraska Public Power System
New Mexico Institute Of Mining & Technology
New Orleans Public Service
New York State Electric & Gas Corp.
Niagara Mohawk Power Corporation
Nigerian Gulf Oil Co. Tri-Town Video, Inc.
North Arkansas Electric Co., Inc.
North Pine Electric
Northern Electric Co.
Northern Lights Inc., Sandpoint, Idaho
Northern Minn. Power Assoc.
Northern Neck Electric Co., Warsaw, Va.
Northern States Power Co.
Omaha Public Power District
Orange & Rockland Utilities, Inc.
Oregon State Board Of Aeronautics
P. U. D. #1 Of Ferry County, Wn.
P.U.D. #1 Of Okanogan County, Wn.
Pacific Gas And Electric Co.
Pacific Power & Light Co.
Pacific Utility District #2
Path Products, Inc.
Pennsylvania Electric 00.
Philadelphia Electric Company
Plumas Sierra Rural Electric Co.
Potomac Edison Co.
Power City Electric Co.
Power Line Erectors
Priester-Mell Co., Inc.
Procurement Division - U. S. Army
Public Service 00. Of Tulsa
Public Service Co. Of Oklahoma
Public Service Electric & Gas
Public Service Od. Of Colorado
Puget Sound Power & Light 00.
R.S.R. Electric Co.
Raft River Electric Co., Malta, I
Renville Sibley Co.
Reynolds Elec. Eng. Co.
Rio Grande Electric Co., Marfa, Tex.
Riverside Industries
Rochester Gas & Electric Corp.
Rural Co Power Association
Salt River Project
San Bernard Elec. Co-Op
San Diego Gas And Electric Co.
Sandia Base, Albuquerque, N.M.
Shelby Electric Co, Inc.
Sheyenne Valley Electric
Sioux Valley Empire Electric Co.
Southeastern Electric Co
Southern Colorado Power Div.
Southwestern Electric Service 00.
Southwestern Public Service Co.
St. Croix County Electric Coerative
Sulphur Springs Valley Electric Co., Inc,
Sutton Spray (M., Inc.
Tampa Electric Co.
Texas Electric Service Co.
Texas Highway Department
Texas Power & Light 00.
Toledo Edison Co.
Tri-County Electric Assoc.
Tristate Electrical Supply Co.
Tucson Gas & Electric
U.S. Bureau Of Indian Affairs
U.S. Bureau Of Reclamation, Arizona
U.S. Department Of Agriculture
U.S. Geological Survey
U.S.A.F. Academy, Colorado
Umatilla Electric Co.
Union Electric Co.
United Power Association
United Telephone Company Of N.W.
Utah Power & Light Company
Victoria County Electric Co., Texas
Washington Water Power Co.
Wright-Hennepin Co. Electric Assn.
Yazoo Valley E.P.A.
Yuma Proving Grounds
ABS vs Fiberglass
Our SpanGuard ABS and EHV markers are constructed of K-10 ABS, a material that has 15 times the weatherability and color retention of fiberglass. It is also much more durable. Unlike fibreglass markers, our ABS markers will not crack if struck by gunshots. See photos of failed fibreglass markers to the left. Click on the images to enlarge.
Spiral Preform Attachment
All SpanGuard markers are securely attached to the conductor or shield wire with spiral formed armor rods. These spiral preforms extend outward from the marker and actually reinforce and protect the conductor at the point of attachment. They are completely slip-proof. To our knowledge, none have ever come off the line. The preforms are matched at time of order to the specific size, type, and diameter of line.
SpanBrite Reflective Tape (Day Shot)
SpanBrite Reflective Tape (Night Shot)
SpanBrite Nighttime Option
SpanBrite reflective tape is an option available with all SpanGuard markers, making them more visible at night for helicopters and small planes. The flashing lights of the aircraft reflect off the SpanBrite. Helicopter landing lights make SpanBrite visible up to 2500 feet away at night (750 feet with a small flashlight). SpanBrite is superior to phosphor paints, which are slow to react.
SpanGuard Assembly
SpanGuard Helicopter Installation
SpanGuard EHV
Assembly & Installation
SpanGuard markers are easy to install on the ground or from a bucket, and they are ideally suited to installation by helicopter. This makes it possible to install markers on otherwise inaccessible line across rivers or deep canyons, or where it is not feasible to take the line out of service.
Two helicopters can install over 100 SpanGuard markers in a single 8-hour shift, including refueling time. The markers can be largely assembled on the ground in a "clamshell" configuration with the spiral preform in place. In the air, the preform is ready to wrap around the line and only the three bolts closest to the installer need to be installed. P&R Tech partners with Haverfield Aviation and other helicopter services to coordinate the ordering and installation of markers.
See the SpanGuard Assembly & Installation data sheet (PDF) and Helicopter Installation video.
Helicopter Installation Video
1-minute video of a SpanGuard marker being installed from a helicopter.
SpanGuard EHV Ordering
Utilities may stock SpanGuard markers and spiral preforms in various sizes (the marker halves nest to save space). Otherwise, all markers are made-to-order, and utilities should order 4–6 weeks in advance of installation, or longer during the peak summer season.
Ordering Instructions
SpanLite markers are made-to-order, and utilities should order 8–12 weeks in advance of installation, or longer during the peak summer season or for special orders.
Ordering Instructions
1. Give Model Number and Color of markers. See suggested specification text.
2. Give type and size of line, diameter of line, copper or aluminum.
3. Terms are Net 30.
4.
FOB Roseburg, Oregon.
SpanGuard EHV Marker Models
| Model | Diameter | Weight (w/o rods) |
|---|---|---|
| EHV24 | 24" | 13 lbs. |
| EHV36 | 36" | 20 lbs. |
SpanGuard EHV Ordering
Utilities may stock SpanGuard markers and spiral preforms in various sizes (the marker halves nest to save space). Otherwise, all markers are made-to-order, and utilities should order 4–6 weeks in advance of installation, or longer during the peak summer season.
Ordering Instructions
SpanLite markers are made-to-order, and utilities should order 8–12 weeks in advance of installation, or longer during the peak summer season or for special orders.
Ordering Instructions
1. Give Model Number and Color of markers. See suggested specification text.
2. Give type and size of line, diameter of line, copper or aluminum.
3. Terms are Net 30.
4.
FOB Roseburg, Oregon.
SpanGuard EHV Marker Models
| Model | Diameter | Weight (w/o rods) |
|---|---|---|
| EHV24 | 24" | 13 lbs. |
| EHV36 | 36" | 20 lbs. |