Recurring issue - Burnt Coax Cable

In the image of my OP you can see the outer casing of the Coax wire is deformed/bubbled up.  Additionally there was a burning smell that emanated from the box.  Also the plastic casing, housing the connection had burn marks within it as well.

My browser doesn't like Imgur.

I'm concerned about these "technicians."  What were they doing all along?  Just snipping off the end of the cable and replacing it?  No concern why the cable was overheating?  This is a fire hazard for you and your family.  These technicians should lose their certification and license.

If all 4 techs were following policy to ignore any potential electrical hazard, you may have a case with your State BBB.

I called with the Electrician whose down the street from me.  He stated that this is a bad ground, he said he had the same issue with them. 

He stated that Cox should have the means to properly ground their equipment.  He offered to take a look if they don't resolve this. 

He stated that this is a bad ground, he said he had the same issue with them.

My takeaway:  it's either unintentional or intentional.  I find it hard to believe your 4 techs and your neighbor's tech(s) missed a faulty grounding wire.  Cox must be hiring techs at our Southern border.

On the other hand, Cox may be engineering faulty grounds into their install to maintain a healthy revenue from tech visits.  How long have you had service with Cox?

My parents lived in this house prior to me, they had Cox telephone, cable TV, and internet with no issues.    I've been here since September '20 and I have had service with Cox with the same issues ever since.

The difference between my parents and I is, I didn't rent my modem from Cox and only have internet service.  I'm under the impression this is part of a wider home electrical issue for other reasons. 

Did your parents have electrical problems?

I was under the impression you sent your image to an electrician neighbor and he confirmed the ground within the image...at your Network Interface Device (box)...is faulty.

The technician found that when the cable modem is connected and powered on voltage is being sent out through the coax cable.  I will need to work with the landlord, my father, on.  I may have to assume the cost given his nature towards anything deemed expensive...

All that aside thanks everyone for your input. The issue is electrical and I'll try to update someday in the future when I'm back online *fingers crossed*.

0.04 volts wouldn't fry RG-6.  Did you measure amps as well?

To clarify, the faulty modem was an Arris SB6190.  When connected to the coax and powered on, it sent Appx 12V upstream through the coax cable.  The spare modem is another arris brand, but older.  The older modem was the device that sent .04V upstream.

Currently I have a Cox panoramic wifi modem plugged in that is doing fine, with no readings going upstream from the device through the cable.

Considering Power-over-Coax and satellite receivers, 12v still wouldn't.  The SB6190 must have been kicking out lots of amps.  I don't know...10+ amps.

I see what you're saying now.  I don't have the SB6190 anymore as I finally got Arris to process a warranty return. 

I'll test the amps for the new one when it arrives.

I appreciate the updates because your problem was interesting.  Who doesn't like troubleshooting burnt coax in the morning?  You may also have correctly isolated to faulty components within the modem.  Maybe something in your NID couldn't handle the "kicking out."

Amps on the bus go nom, nom, nom.