ST9302-SP 931022~m~,~c .w.0_B. Ss DEPT.
732 DEFOREST RD.
P.O. BOX 478
COPPELL, TEXAS 750].9
FAX .;l' (214) 393-764H
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.'.'.endinq %his fL~.x.
"flIELECTRIC
November 10, 1987
Mr. Steve Goram
City of Coppell
1132 Deforest
Coppell, Tx 75019
Dear Mr. Goram:
You recently requested some clarification of the process by which street
lights are requested in underground developments in Coppell. Below is a
step by step outline of this procedure:
Step 1
The developer provides TU Electric a street layout. TU Electric
designs a street liB'htinZ system in accordance with the City of
Coppell's lighting requirements.
TU Electric prepares Form 1323 {Request for Street Lifhting
Facilities) and forwards 3 copies of this document along with 3
prints showing proposed street ii~ht locations, to the City of
Coppell for review. This document is the City of Coppell's request
£or the new lights.
Step 3
Jpo~ acceptance of khe street light design, the City of Coppell
signs the Form 1323 and returns 1 signed copy to TU Electric. (The
other two copies are for the City's recordsj.
Step
4 Upon recezving the signed Form 1323 from the city, TU Electric
determines the excess cost fo~ underground street lighting
facilities and notifies tile developer of this cost.
Step 5 The developer provides security to TU Electric for the excess cost
for ui]derground facilities.
Step 6 TU Electric installs street l~ghts along with underground service
facilities.
If you have any other questions or ~f we may be of any additional help,
please feel free to call Glenn Fabian at 323-8911.
Sincerely,
Thomas Parsons
Bistrict Manager
TGP: GF: tah
P. O. Box 819061 Farmers Branch. Texas 75381-9061
PRINT $2 - 2 - 250 #att ~KIN~ Street Lights
Located in street tedians on 30 ft.
anodized bronze standards.
alu.inuB
Spacing determined by the formula in the Appendix
Section.
1
COpYRIGHt-/974 'BY
'~ ".; 7-'
-" ': ~A91749~P.~% Box 1275
Telex: 67;0491 C~ble: KIMLTG-- NDUSTRY
Phone; 213~.968-5666
ROADWAY/
AREA LIGHTING
· ..~,MANUAL .
D
ROADWAY LIGHTING CALCULATIONS
Once you know the desired level of illumination (or the
minimum level recommended from Section C), the next
question becomes--How far apart do I put the poles to
get this level of illumination?
Keep in mind that level of illumination values are averaqe
values and that usually calculations are based on maintained
figures with the lamp at its lowest output and luminaire in
its dirtiest condi~tion.
There are also several ways to place poles along a roadway.
Here are some of the more frequently used methods.
ONE SIDE - POLE PLACEMENT STAGGERED - POLE PLACEMENT
Use 1 luminaire in formula Use 1 luminaire in formula
MEDIAN STRIP-POLE PLACEMENT OPPOSITE - POLE PLACEMENT
)m · m !
Use 2 luminalre~ in formula Use 2 luminaires in formula
Illustration ~11
K~m LlghU~g, Inc.
D1
The "spacing between poles" is determined by formula:
Spacing
Between =
Poles
Roadway Liq~tinq - Basic Formula
!
~umber of
Luminaires
In-Line
Across the
Street At
One Point. Initial
See Illus- Horizontal
tration ~11 x Lamp Lumens
Average Maintained
Illumination Desired
in Footcandles
Coefficient
of
x Utilization x
x Width
of
Roadway
Recommended
Light Loss
Factor
The "number of luminaires in-line across the street at one point"
depends on the number of fixtures on each pole and the pole
placement. (See Illustration %11)
The following table will give you values for "Initial Horizontal
Lumens", and Recommended Light Loss Factors" depending on lamp
used. Check the Ecology catalog for the proper coefficient of
utilization.
Lumens ~iliz~lon
175 Watt Mercury Vapor - Deluxe White 7,750 0.74
250 Watt Mercury Vapor - Deluxe White 11,500 0.74
400 Watt Mercury Vapor - Deluxe White 21.500 ~ 0.71
4Q0 Watt Metallic Halide - Clear 30.000 ~ ~ 0.70
~50 Watt Hiqh Pressure S6dium~ 25,506" ~ ~ 0.80
400 Watt Hiqh Pressure Sodium 47,.000 ~
1000 Watt Mercury Vapor - Clear 54,500 0.76
1000. Watt"Mercury Vapor ~' Dei~xe White '- "60,000 . .. ...'... 0 66
10Q0 watt Metallic Halide - Clear 95,000 0.78
1000 Watt Hiqh Pressure Sodium 130~000 0.83
EXAMPLE:
"One Side" pole placement
One luminaire on each pole
Mounting Height 30'
Width of Roadway - 50'
400 Watt metallic halide lamp -
30,000 lumens (Table Pg. D-2)
Average maintained illumination
desired - 2.0 footcandles
Spacing
Between = 1 x 30,000 x 0.41' x 0.70 = 86'
Poles 2.0 x 50
* To determine the coefficient of utilization, follow steps 1 and 2.
House I Street
Side ~ Side
Mounting
Height
30'
STEP
Read
0.41 -
C.U.
And
Use
In
Formula
Width of Roadway
50'
~ ! IIII Eli I I I
~ ~ q IIIIIIlil
0 I 2 3 4
wld~ofarealnunitl~mO~tlnghelghtl
T
Width of Roadway in units of 1.67 MH
STEPQ Mounting Height equals 50' ]
divided by 30' or 1.67 MH.
When lighting a roadway from the center median strip also determine
the house side coefficient of utilization in the same manner. Add
this value to the street side value and use the total value in the
formula.
Klm Lighting, Inc,
D3
Form 1323: Request for Street Lighting Facilities
This is a standard form by which cities request the installation or
removal of various types of street lights.
This form is typically filled out by the city and forwarded to Texas Power
& Light Company so that our Accounting Department can set up new lights or
remove lights from the city's account.
REQuEb, FOR STREET LIGHTING FACILI, .:S
AT "[~iE SLrb~vl~R' P~ACE ADD'N
Coppell
Texas
I9 R6
Texas Power and Light Company
Gentlemen: ~ '
Th~s is to request that you install and/or remove street lighting Caci ties w~th lamps of the size and at the
Io:ation as shown below in the city of ¢'n~r~l 1
Cont. Ins ~aLlation Cont. Removal
No. No. T~pe Size ~Sch. ~M/F No. ~o. ~e ~ze ~ Location
1 ~S 10~ F ~ P~ 8 ~y ~e
1 ~S 10~ F ~ Pla~ Dr.
1 ~S ~10~ F ~r Pla~ ~.
1 ~S 10~ F ~ Pla~ Dr.
1 ~S 10~ F ~ Pla~ ~ ~i~e ~
1 ~S 10~ F ~ ~-
1 ~S 10~ F ~ ~-
1 ~S 10~ F r~i~ ~.
1 ~S 10~, F r~ ~.
Metered, F -
A, B, O, D, etc. schedules
~pecie.]. Co~Lt~io~s ~ Dev~lo~e~ ~o pa~ DIC
Electric Serv!ce for the operation of the above facilities is to.be supplied and billed under terms and
conditions of Agreement Number . between the City of
and Texas Power and Light Company'.
W. A. No. //g~ Proj. 19-3629
Form 618 No. -3o°~"_~0
Completion Date , 19
By ~/~ ) ;l~l~'a~ /~-''''~-t'- ~- ,-
Title
Form 1323--Rev.
REQUEST FOR STREET LIGHTING FACILITIES
, Texas
, 19
Texas Power and Light Company
, Texas
Gentlemen:
This is to request that you install and/or remove street lighting facilities with lamps of the size and at the
location as shown below in the city of
Cont. TnstAl~ation 3ont. Removal
No. No. TypeI Size ~Sch. ~t/F No. No. ~Ty~e S~ze ~M/F Location
~{ = Netered, F = Flat
· * = A, B, C~ D, etc. schedules under Rate SI.3
Special Co~tions:
Electric Service for the operation of the above facilities is to be supplied and billed under terms and
conditions of Agreement Number
and Texas Power and Light Company.
W. A. No.. Proj.
Form 618 No.
Completion Date
, between the City of
. 19
Yours very truly.
City of ,
By
Title
DATE
10/22
TIME
10:51
MESSAGE
TX-TIME DISTANT STATION ID
06'5?' 819 ~55070
CONF I RMAT I ON
DATE:10722/9~ TIME:lO:58
ID:
MODE PAGES RESULT
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