text: <s>[INST] Powerflex 70 electrical noise I am having a problem with electrical noise from the output of a pf70 that is affecting a metal detector in a food production line. The noise is being picked up on the coil of the detector and has been confirmed with an O'scope, it is preventing the detector from doing it's job. We have confided it's coming from the drive by wiring the motor directly to 480, 3 ph, 60 hz and the noise disappears. The pf70 is in the MCC about 250 ft away from the motor which is a Franklin Hydro Duty, 2.0 hp, 2.8 fla. the output wires are bundled with several others out of the MCC run through conduit, then branched off to the motor. The wires are not shielded. Thank you [/INST] I suggest (unless already done) to take a look to the following publication: Wiring and Grounding Guidelines I think it could be very useful to you for this issue... it contains: Wire and cable typesPower Distribution GuidanceGrounding InformationCable Routing InformationRefective wave description and effects of.Electromagnetic InterferenceBearing CurrentsMotor Cable Length Restrictions Tables Hope this helps... - fuzzy logic \\n </s>