Questions about: grounding - страница 2

If you're talking about the equipment grounding conductor, and not the grounded (neutral) conductor, then they may not have to "share" the same equipment grounding conductor. This answer contains all the code references, if you want to give it a read
Well, it's not prohibited to drop another ground rod. It's a good idea. Can't hurt, might help
I will have to look tonight to be 100% sure, but I am almost positive that it is only the three large black wires going from the main panel to the sub panel. So, if I am understanding correctly and if I do in fact only have three wires. Then I can ad
It's not going to trip, because the contact resistance between the rod and the ground is too high, therefore the current will be low (Ohm's law). Despite what people may think, electricity is trying to find a way back to the source, not to the ground
Well it is the National Electrical Code that requires 25 Ohms or less. Notice the exception after #5. 250
I am renovating an old home(90 years) that my wife and I just purchased. The electrical system in the house is outdated - some of the outlets appear to be knob and tube but most are the brass and silver; forgive me if this is incorrect info, I honest
Most lamps have a two-prong plug. All the lamps in my house, even the ones with metal casings, have two-prong plugs. I don't think you have a safety problem
Tester101 nailed the question, so I'll cover another option. Depending on your situation, it is often possible to retrofit ground. Normally, wires in a circuit must be kept together for good reason
in a three prong 120V standard household outlet you have 3 prongs a flat prong on the left, (HOT or 120v relative to earth ground) typically wired with black blue or red in color a narrower flat prong on the right (NEUTRAL 0v relative to earth ground