Philip wrote:I would choose a better wire than THNN. That covering on THNN likes to crack and break if it sees much vibration. Seen it many times in different types industry's I have worked in.
Switch to a automotive type wire. The insulation is designed for vibration.
Padilen wrote:I used an extension cord AC and ran it with my DC wiring in PVC. What is induced interference and what is an indicator that you have a problem?
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Bob Hammond wrote:Hi, after reading threads here and elsewhere about running AC & DC in the conduit, I decided that the principal concerns were 1) adequate insulation, and 2) parasitic induction of AC interference in the DC wires. I decided to do it since it's a single short run of ~14 ft. All wires are 14ga THNN weith 600V insulation, using Blk/Wh/Gr for the 120VAC, and R/Blu for the 12VDC, with all running through a 1/2" PVC conduit.
I expect that I will be using either DC or AC but not both simultaneously, and my theory is that if no AC current is flowing then there should be no induced interference in the DC wiring. Is that logical? Also, suppose I were to place ferrite chokes on either end of the DC wires; would that suppress any induced AC interference? I was thinking about getting the ferrites from defunct computer monitors.
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