Locally - here... One could get some grief about opening a seal and pulling a meter - in the form of a light tongue lashing with bad attitude - but more often than not just a hairy eyeball. That said if you blew something up - after you got out of the hospital - there may be some other things in store for you - not known anyone to get that far.
Back to the OP - start over on the service.... But lets examine the service call too.
I had a service call at a residence with an old 100 amp service. Both the POCO and CATV company were there prior to me getting there and left the service as is and told the HO to have her service upgraded.
Was the main off - or on? Important - if it were on, and turned on by the HO or you - that takes the POCO out of liability completely.
Upon my arrival I noticed that the service drop for the CATV had melted. The HO was told that their phones and internet would not work because the amperage on the ground at the CATV drop was greater than 1 amp (I've discussed this some time ago in a previous post).
Lets stop here for a moment - if you know that there is current on the neutral by this damage to the CATV and phones, then it can be assumed to be a lost or intermittent neutral connection. If I had the slightest hint of this on the phone from the get go - I would have asked if the breaker is off, and if not - tell the person to shut it off until I get there. If they felt the slightest discomfort in shutting it off themselves I would tell them to UNPLUG EVERYTHING THEY CAN - FAST!
When I clipped on my amp probe there was actually almost 5 amps on the ground wire. I ran a temporary new ground wire and bonded it to the ground bar at the breaker panel. At the moment it seemed to reduce the amperage at the CATV D-mark by about 2 amps. Suddenly, the freezer in the basement kicked on and all the lights went dim. A few seconds later they got real bright. I got out my meter and measured the voltage at the breaker panel. There was about 78 volts on one hot leg and about 186 volts on the other. At that point I shut the main breaker but I was too late. The over-voltage burnt up the computer, CATV box and melted the CATV wire at the D-mark.
Since you knew, or should have known it was a 'HIGH/LOW EVENT' - you should have done your best to remove all loads, if not all voltage sensitive or expensive loads from being energized - and not have attempted any temporary bypass. A bypass to what I am not sure?
"temporary new ground wire (from where?) and bonded it to the ground bar at the breaker panel"
Before doing ANYTHING - I would have walked through with the HO and taken note and made sure certain items were unplugged - then informed them of the possibilities of damage to things that did not get unplugged or disconnected.
Did you check voltages before doing this jumper? If so - where, and under what condition - loaded or unloaded?
When the POCO originally came out to the house the HO said they checked their connections at the mid-span and at the point of attachment to the house. They never cut the tag on the meter enclosure or opened it to check inside. Their position is that the equipment attached to the house is the responsibility of the HO. As far as I'm concerned, by not inspecting the inside of the meter enclosure and leaving the customer with a obvious and potentially dangerous situation is irresponsible on their part. If you look at the attached photo you can clearly see that the service drop neutral is detached from the neutral in the meter enclosure. I think the HO should fight this and try to get compensated from the POCO. Any thoughts ?
The HO owns the service conductors and meter base most likely from the point of attachment to the house. Since most POCO guys are known primadonnas - it can be assumed they don't do what they should ethically, but only what they have to do legally. It sounds as if they did just that. The extra step would be to cut the seal or remove the lock on the meter for you - but that in of itself presents liability for them giving you the idea they may have already checked it. A note from them would amount to the same....
My thoughts would be to chalk it up to a lesson learned, and some changes in how you approach service calls of this type to also reduce your own liability....
That said, I think the damage was done to the destroyed appliances before you got there. These were damaged by the HO's equipment failure. But that is not to say that your actions with the jumper were not the straw that broke the camels back.... Difficult to know or for that matter prove??? (Anyone?)