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Calculate No of Street Light Poles _ Electrical Notes & Articles

STEEL ROUND POLES - LSI Industries

kornegayengineering wp content uploads 2011 05 Special Research Topic Report on Current Practice in Utility Distribution Poles and Light Poles Adam Crosby Date 5 05 11 1 0 Objective The objective of this report is to present a summary of the current practice of the structural design of

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Structual Design of Utility Distribution Poles and Light Poles

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te No of Street Light Poles _ Electrical Notes & Articles

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Calculate No of Street Light Poles | Electrical Notes & Articles

com/2014/05/04/calculate-no-of-street

Electrical Notes & Articles Sharing Abstracts,Notes on various Electrical Engineering Topics

MAY 4, 2014 24 COMMENTS (HTTPS://ELECTRICALNOTES

WORDPRESS

COM/2014/05/04/CALCULATE‐NO‐OF‐STREET‐ LIGHT‐POLES/#COMMENTS)

Luminaries are properly selected and mounted on a location most feasible and effective with minimum cost

 For a 230 volts system, a voltage drop of 5% is allowed although in extreme cases 15% voltage drop is sometimes tolerated

jpg) Street illumination level in Lux (E)=(Al x (cu x mf)) / (w x d) E = The illumination in Lux w = Width of the roadway d = Distance between luminaries cu = Coefficient of utilization

 Which is dependent on the type of fixture, mounting height, width of roadway and the length of mast arm of outreach

? Al = Average lumens, Al = (E x w x d) / Cu x mf The typical value of Al is 20500 lumens for 400 watts 11500 lumens for 250 watts 5400 lumens for 125 watts The value of Al varies depending upon the type of lamp specified

mf : It is the maintenance factor (Normally 0

8 to 0

Calculate Lamp Lumen for street Light Pole having Road width of 7 meter, distance between two Pole is 50 meter, Maintenance factor is 0

Solution: From Above table Recommended of illumination (E) in Lux is 6

 meter

Average Lumen of Lamp (Al)=(E x w x d) / Cu x mf Al=(6

9)= 8662

83 lumen

 Therefore, a 250 watts lamp is acceptable

Let’s Computing for the actual illumination E for 250 Watt Lamp

Calculate No of Street Light Poles | Electrical Notes & Articles

com/2014/05/04/calculate-no-of-street

Illumination (E)=(Al x (cu x mf)) / (w x d) E= (11500×0

Conclusion: Actual illumination (E) for 250 Watt is 8

Hence 250 watt gives adequately lighting

Calculate Space between Two Pole of Street Light having Fixture Watt is 250W , Lamp output of the Lamp (LL) is 33200 lumens ,

Required Lux Level (E) is 5 lux , Width of the road (W) = 11

5 M),Height of the pole (H) = 26

8 ,Luminaries dirt Depreciation Factor (LDD) = 0

Luminaries Spacing (S) = 75 feet (23 Meters)

The allowed illumination time in hours T = k

Where: k = extension factor t = permissible time in hours at 1000 lux, unfiltered daylight E = luminance (lx)

Extension Factor Lamp

Extension Factor

Incandescent lamps,

7 to 3

Halogen reflector lamps

5 to 3

Halogen capsules

5 to 3

High‐pressure metal‐halide

1 to 2

High‐pressure sodium lamps

Fluorescent lamps

9 to 2

Example: In sunlight (100000 lux) and extension factor 1: The permissible illumination time (T) =1 x 70 x 1000/100 000 = 0

7 hour

In halogen light (200 lux) and extension factor 2

3 x 70 x 1000/200 = 805 hours

In UV‐filtered halogen light (200 lux) and extension factor 3

5 x 70 x 1000/200 = 1225 hours

Once luminaries spacing has been decided It is necessary to check the uniformity of light distribution and compare this value to the selected lighting Uniformity Ratio ( UR) = Eav /Emin

Calculate No of Street Light Poles | Electrical Notes & Articles

com/2014/05/04/calculate-no-of-street

Eav= average maintained horizontal luminance Emin = maintained horizontal luminance at the point of minimum illumination on the pavement

At a simplistic level, the cost of running a light is directly related to the wattage of the globe plus any associated ballast or transformer

 The higher the wattage, the higher the running cost and it is a straightforward calculation to work out the running cost of lamp over its lifetime: Running cost = cost of electricity in $/kWh x wattage of lamp x lifetime in hours

The Average Lux Level of Street Light is measured by 9 point method

 Make two equal quadrants between two Street light poles

on the lane of light poles( one side pole to road)

We have 3 points P1,P2 and P3 under the light pole then P4 & P7 are points opposite pole 1 or Point P3 same is applicable for P6 and P9 for Pole 2

The average lux = [(P1+P3+P7+P9)/16]+[(P2+P6+P8+P4)/8]+[P5/4]

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Calculate No of Street Light Poles | Electrical Notes & Articles

com/2014/05/04/calculate-no-of-street

goutam says: May 4, 2014 at 12:00 pm Plz dehumidifier calculation sheet make and sent me

Reply Jignesh

Parmar says: May 4, 2014 at 4:13 pm Yes sir, But what is Dehumidifier 

? Reply Atta Khan says: May 5, 2014 at 6:34 am seen thanks Ak Reply Ashish Lotake says: May 8, 2014 at 6:39 am Thanks for forwarded notes

 also forwarded the 33kv line deatils like conductor size,materials list and etc……

Reply darwin says: May 9, 2014 at 3:49 am sir i couldn’t see the table of Recommended Illuminations like what you have said in your example

 May you send it to me

Reply darwin says: May 9, 2014 at 3:53 am Example on Calculate Lamp Watt for Street light Pole sir

Reply Jignesh

Parmar says: May 10, 2014 at 5:06 pm Dear Darwin,

It is already explain in Post… amrendra kumar says: May 13, 2014 at 11:59 am very interesting…

))) Reply uday raj maurya says: July 29, 2014 at 7:48 am Required all power & control cable current calculation chart

Reply sahal vhora says: August 20, 2015 at 12:54 pm same here Reply mohamed says: October 14, 2014 at 12:25 pm please i want to know more about 9‐points method and other methods like 12‐points method and more Reply levanluong says: October 18, 2014 at 1:33 am very interesting

 thanks sr

! Reply Rushil says: November 2, 2014 at 3:49 pm i am a student and i do not understand the need for an outreach in a lamp post can you explain Reply pramod kumar chaturvedi says: December 26, 2014 at 9:57 am Required out door street light lux calculations chart (1) pole mounting height 7

Calculate No of Street Light Poles | Electrical Notes & Articles

com/2014/05/04/calculate-no-of-street

mtr (4) boom angle 1o dig (5) arrangement double row with offset (6) luminaire wattage 172 w (7) luminous flux (lamps) 17000 lm (8) Road width 7 mtr (9) Required Lux Level mim 20 lux (10) light loss factor 0

CAN U PLEASE GUIDE ME TO CALCULATE LUX LEVEL OF A FOOT BALL STADIUM Reply eric says: May 13, 2015 at 4:26 pm good day sir i have a problem to calculate the luminous flux of a lamp wattage of 250watts,height of pole 7

5 please can u help me out Reply SAJIN says: May 25, 2015 at 6:59 am Dear Sir,\ Thanks for the details and is very helpful, My doubt is why this calculation vales not related to pole height

? How we can determine pole height for a out door lighting project

? How we can determine wattage for a fixture which is placed at high level area

Please reply Reply Kailas Watekar says: June 2, 2015 at 3:06 pm To find the distance between two street light pole of 9 meter height having fitting of 250 watt high pressure mercury vapour Reply Varad Enterprises says: July 18, 2015 at 9:29 pm Hello Jignesh Sir,

Can you please guide me how to calculate the voltage drop in designing the street lighting

 Want to determine the size of the cable to be used for the highway road where 120W LED Street lighting is to be used

 Span between the pole is assumed to be 20‐25 m and the lighting poles are in the middle of the 100 m road Reply Vineeth Kumar C G says: July 28, 2015 at 9:27 am simple but u didn’t considered pole mounting height

? what is the standard street light height

? Reply sansereyvathna says: October 16, 2015 at 8:17 am where is table Recommended of illumination

? I can’t see it

Reply sandeep ji says: December 30, 2015 at 2:18 pm dear sir / madam this is good but practical data is not mach , utilization and multiplication factor how to decide , any one can give me right solution for street light pole , wattage , lux any formula please explain me ,

sandeep kumar m:‐09914421455 [email protected] Reply getnet says: February 3, 2016 at 11:27 am pleace notify standards for home installation via my e mail

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