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	Subject - Service Ground David Hyatt I started my first commercial job today that I have ever done own my own. It went well but, I have a question. There are three offices feed by one feeder from the utility to a gutter box. Office one meter is already made up and working. I added a meter beside it and feed my panel, feed from the gutter to meter as well for power company to hook to. My question is: there is one ground rod hooked to the gutter with a single lug, then feeding the meter. I took a wire from my meter to the same lug, is this legal? Is one ground rod legal? Should I have added another lug? I will be taking a #4 bare to the building steel from my panel as well. Do I need to ground to the metal underground water pipe also? lctrc789 David are you saying that you have one gutter with many conductors feeding a group of meters from a service location? The feeders are the same as a feed from one service I think that is what you are saying? With a splice or tap to each meter, If so that is one service group and all you are adding is a meter. I think I am right by saying yes one ground rod, two seperate clamps for that, and yes definitley,Use your building steel and water pipe for grounding. The more grounds the better. If I am understanding you right you have a new meter, new panel and thats that, Off of one set of feeders used for mutiple offices. Article 250-50 may help you as well as aricle 250 -58 on common grounding electrode. David Hyatt Yes, the gutter will feed three meters to three offices. One ground wire run to one ground rod. I spliced my ground from the second meter to a lug inside the gutter. Didn't run new wire to rod itself. This is the way it was done on the other group of offices. Thats OK, right? As far as the water pipe can I run a #4 copper from the panel through a mechanical lug bolted to the building steel then to the water pipe, or just run two grounds from the panel, one to the structure and one to the water pipe? lctrc789 David, I would run both grounds to steel and to water both. We use as many type of grounds as we can see nothing wrong with what you are doing. The ground in the gutter is ok here in this county with the lug ground. Good luck relbas When you connect multiple grounds, is this a parallel circuit for the ground pat?