Generally, it's a loose term for poor grounds, where sometimes some voltage that should terminate at one device "floats" along a poor ground to another branch, where it finally finds a route to ground. That's the theory. I guess he's saying that poor grounds in the house, not his wiring, are causing those lines. It could just as well be his wiring, or by installing things too close to motors, microwaves, and things that cause emissions. You could get a real electrician to check out your house, and if he gives it a clean bill of health, then go after the cctv installer. But be warned, you're looking right into a can of worms!
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Marty and Martha
2015 Z-1 211RD
2012 Nissan Titan
Dalzell SC
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