I have been doing some mock inspections on a few houses and these are some questions I have come up with.
Question 1: Main panel on the exterior of the house sub on the interior. Ground comes out of the main panel and is cut about 6" under and never makes it to ground rod. I know this is a fault and will be called out for fix my question lies in the other ways the system is grounded. Since the primary ground is cut the ground wire goes from the main panel to the black iron gas pipe then to the water pipe with a continuous wire that now makes the gas pipe the primary ground right? That is incorrect from what I have read but I am still fuzzy on all the ways to ground the system. If I am not mistaken the gas should have an independent ground from the electrical system and this setup should also be called out. Home is a 2005
Question 2: I know you can double tap ground wires but can you double tap a neutral and ground under the same lug in the main panel? Also what would be a good narrative for a ground wire that is not grounded within 5’ of the main water entrance into the house for grounding a service to copper pipe? Home is a 1988
Question 3: A Zinsco sub panel don’t know the manufacture year but it is a older one all of the neutrals and grounds share a bus bar and there are numerous double taps. I was wondering if there are any exceptions where this is acceptable. This house has recently gone under another home inspection within the last year and was okay’d by an FHA inspector a regular home inspector and 2 different electricians and they where specifically asked about the panel and said all was good. Home is late 1950 early 1960
Question 4: Is it ok to make a GFCI outlet work by just running a ground for that outlet to a copper pipe. I would tend to think not because it really seems like an easy way out and those usually are not the best idea and would you have a good narrative for a non grounded house with 2 prong outlets?
If I didn’t explain anything well just let me know and I will try to clarify for you.