These are extremely well shielded. The EF reading dropped from my previous cables from ~100-200 V/m down to ~1-2 V/m. These should be standard! Toss the old cables in the garbage.
Eliminate Unwanted AC Electric Fields from Electronic Devices and Appliances - Shielded AC Power Cords 120 Volt - Available in 12 Foot and 6 Foot lengths
CAUTION: All modifications to the power cord or appliances should be completed by a certified electrician and comply with local electrical codes.
Detect, Protect and Verify: Three Steps to Achieving Peace of Mind
(12 Foot / 3.7 meters) or (6 Foot / 1.82 Meters) Shielded AC Power Cord: Qty=1