Street Lights Poles

with separate cables

For 35m height of lighting fixtures Mast is used. Refer AN Wallis for detail of lightning spike. Spike is connected by a seperate cable to dedicated earth pit.

Do the same rules apply for the 'States?

Is there any way to use the mast and the dedicated earth pit to charge very large batteries? With an efficient system a company might be able to power an office building or a string of stores with batteries?

Of course, the real problem is not harvesting the 'waste' electricity but making sure that the Electric companies make enough of a profit, no matter who starves in the process. And we call this progress?

Orpheuse (The Fool)

Mr Orpheuse,

Mankind is yet to develop technology on storing impulse energy. Utilising the same and profit making by electricity co etc etc, is too oooo far away.

If you have any innovative idea of storing lightning energy, your name will appear next to Mr Ben.F

Mr. Biswanath.das,

Thank you for your reply. As you can see I'm rather new to this forum and to engineering in general. I am here to learn and you folks are my teachers.

I'm sorry if my questions rankle but I don't know any other way to learn aside from asking questions.

Thank you for your patience and guidance,

Orpheuse

I could not find a complete detials of construction and connection of arristors/spiks can some one help

First, have the earth pit prepared. Earth resistance must be less than or equal to 0.5 ohms. There exist a number of methods for achieving an earth pit, so must be done by a professional.

Secondly, Bond the spike to the electric pole or mast.

Connect commensurate length of 25mm (or above) pvc insullated copper cable to the arrestor spike.

The copper cable must be crimped to a cable log and bolted to the spike.

For neatnes, sleeve the cable with flexible pipe (white colour preferably) and run down through the pole trunk and holding firmly with rungs of cable ties.

Finally, connect opposite end of the cable to the earth terminal as done for the spike.

Alternatively, length of copper tape can be used in place of the pvc copper cable.

I hope this helps you.

Cheers,

ethobil

Couldn't have said it better myself.

Thanks for your kind compliment.

Dear Mr. Ethobil

I think I was not very clear, what you explained is all nice an d good, its valid if you are doing that for one pole, our highway road project is 65km long, the lighting pole are runing al the way, we already having earthing pits in several distances, where our PE (power Earth) are connecterd.

Running a seconed cable for the lighting arristors all the way from the top of the pole till the ground and re-connecting them back to the main PE will cost us several thousand of dollers, that is way I was asking i dont think its logical to do it that way.

There must be anther way (example of power tower, only one top wire is running on all of them).

Dear Riadsaad,

The technique I explained is valid for any number of poles involved. Sure not cheap, considering the cost of materials but this gives the desired protection.

For the project you are handling, I understand your point with respect to height of poles and the distance involved.

You need something like a single point protection capable of covering some distance, in effect protecting more than one pole (indeed, the more the better)

Here, more sensitive Air terminals are recommended. I'm not certain about the cost implication. Look up here http://www.erico.com/products/s3000_1.asp and http://www.erico.com/public/library/fep/s3000manual.pdf for more information.

I hope this meets your needs.

Cheers,

ethobil

I know this is a little off topic but I am surprised that anyone has street lights 35 meters or higher off the ground. That seems like a waste of light. That is as tall as a nine story building. I have never seen a street light that high from the ground. Wouldn't poles this long be made of metal and not need anything beyond a connection from the base to an earth ground?

Dear silvCrow: You & I see alike(with the lamps a bit closer to us -pun intended)

I was likening these heights to the Micro-Wave Towers,(100 to 400 ft) That I Have climbed with a megger test set up so we would see where we were getting/or loosing the best Ground which included the connections to the Lightening Arrestor/& or Rod.

When we found any measurable deteriation, we would disconnect the cable clamps & or Grounding Lugs/bolt to cable Type & CadWeld these disconnected cable to Rod/Tower Base, etc. After which the Resistance was not measurable with the Megger. Carl (Retired Micro-Wave Power Plant Tech. ) (International System Canada Wide.)