If the teflon interferes with any electrical power flow so will almost anything else you can use, except something that has metal in it like KW Copper-Coat. Myself, never had an issue ever and a hundred gauge installs done. The factory Ford sealer coated on many sensors is teflon based. Wrap the teflon tape one thread short of going off the end of threads holding fitting in your left hand and wrapping AWAY from your body with the left. How to make tape run in correct direction to tighten it rather than ball it up while pulling it backwards to loosen. 3 wraps max, more seals worse not better, the big wad then pulls loose in a lump to expose bare thread. Thinner will roll/impress into the rest of threads. How I did it setting up testing fixtures on up to six inch diameter pipe fittings on 30 foot long heat exchangers and tested to 4500 psi.
Really good quality thread cutting on NPT does not need sealant but better to do it, the quality is always suspect when they shuck those millions of fittings out and probably Chinese made. The thread cutting dies get dull and the dragging roughens up the cut to make for leaking. Using sealer also allows you to greatly lower the torque needed and can save fixing like aluminum intake that cracked from overtightening plug or fitting trying to stop leaking. The lower torque makes it easier to pull parts apart years later too. I have been known to not use sealer on vacuum but always on liquids/fluids.