Re: another electricution - metal street pole-baltimore!
This message is addressed specifically to, First, Charlie Tuna, and Second to don_resqcapt 19
I have been waiting for someone to respond to Charlie Tuna's Thread, where he stated, " we should be enforcing the installing of ground rods at the light poles".And then don replies with his thread that this will not solve the issue. The only way is to have an EGC to go from the light pole back to the source.And Don's thread is the correct way.The NEC states in Section 250.56 to have a resistance to ground of 25 ohms or less.
Now we need to put Ohms Law to work I= E/R,
I=120/25 = 4.8 Amps. Now Charlie, how is a ampere reading of 4.8 amps going to trip out a 15 amp fuse or breaker. Bottom line, it will not.
But, if you have a good EGC going back to the source, now you will trip out the fuse or breaker.
For example: A # 10 AWG copper wire has a resistance of 1.21 ohms per 1000 feet.
I=E/R I=120/1.2 = 100 amperes, Now Charlie, do you see what I am describing, the 100 amps will now trip out the 15 amp breaker.
You can still have a ground rod at the light pole, but it would only be for lightning protection, and/or high voltage surges.