What Naim have advised the OP to do, makes no sense to me…
I have always understood that a Naim PS - either Supercap or HiCap - can only power 1 item.
With a Supercap, its complicated by it having a multi-way Burndy output AND two SNAIC DIN5 style outputs. My understanding is that either the Burndy output is used OR the two DIN5’s are used. But never both.
Can anyone explain what Naim have advised the OP to do - @Richard.Dane - ??
Naim seem to be getting cavalier with their grounding these days, first the new classics drop taking the signal to the ps between pre and power and now they suggest doing the same with classic series.
Be interesting to compare this to Supercapped superline and hicapped 282 with the more usual signal routing but my 282/hicap/250 are about 40 miles from my superline/supercap at the moment.
Having a Supercap power two items is not advisable. At the very least it likely has created an earth loop. And feeding the NAP250 straight from the NAC282 is a definite no-no. It’ll all work but it’s not ideal…