Did the engineer concur with your measurement... and are they a qualified engineer?
Watching my building on StreetView, he pointed me the fact the cable was in contact with the gutter, which I confirmed after eye-checking. So on this remark, I had the curiosity to point an E.B meter at the gutter. And renewed it multiple times under a weekly frame.
If you actually had an E-field of 350V/m, this would be comparable to standing next to an operational television transmitter.
I've ordered a Trifield TF2 to compare those figures, made with a "Mustool MT525". It's the low cost reader okay. It seems correct while pointing it at all devices sucking E in the home.
You would suffer generally serious side effects, far beyond some quality of sleep issues. I suspect your meter is faulty or you are misreading it.
Concerning body troubles I wanted to stay kinda silent on it, not liking to complain like cub and my view on the topic being a technical seek.. but let's go with what I experienced growing throughout months:
By instance, when sitting at my Desktop to work, I feel micro deformation of the position of the skeleton due to some constant feeling of stress. I switched for a new chair without change. Once this feeling of displacement in place in my skeleton, I have to do some karate stretching to get it back on track. Ok wrong position and body misplacement is a normal topic.. But I never had such experience, and got a fluid body because of karate practice.
Acoustic problems like tinnitus that vanish after like 4/5 hours away in the countryside.
High concentration problems to produce code or write an article without chopping words when earlier I was switching between C, C#, Java, Unix Administration in all directions without a pain.
Last but not least, neck pain both sides, cerebellar pain on left side. Cables are left of me while sitting at desk. I should swap rooms, but swapping bathroom and lab room is heh..
I will have a question, having not enough knowledge concerning RF levels and power levels involved to be harmful for the human. Can this 400V 3 phase cable that overlays G3 alliance PLC signal, harmonics, and all kind of noise from multiple neighbors be harmful in terms of EMI emissions ? Shorter question, where can I find information, warnings, scientific datas about emission levels and recommendations on VLF/LF/MF antennas ?
I plugged a KiwiSDR with a 5kHz-30mHz antenna in the living room, distant from this cable by about 8 meters and the spectrum is totally jammed on the 5-500kHz. (
https://imgur.com/a/RIXIAng )
Like with the "Mustool vs TriField", I'm in the process of ordering a quality-certified antenna.. buying cheap is buying twice...
Not many connect objects such as gutters and roof (might be different legislation in different countries also), but it is beneficial that every metal object is grounded. If it's done as a lightning conductor, roof and gutters should have copper cable into the ground in each corner of the house, that is then connected to a common ring around the house. If it's for grounding in general, they should be connected to the common point where the house otherwise has it's main incoming electrical panel and ground rod. This way there will be no induced electrical fields in the metal objects.
I will follow your wise advise concerning the grounding. Cablemonkey tasks in list... On that point, in November I went rappelling on my roof to install Starlink, and I had the same weird stress growing, while sitting peaceful the instant before. The roof is a 5% angle top made of following layers: wood structure, zinc, tar.